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BYD SOLAR BATTERY BRISBANE

Solar Battery Prices

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“The Solar Battery market is an absolute minefield. After a tonne of research, it’s clear that the Fronius & BYD battery combination just does Solar Batteries better.”

Mark Cavanagh,

MC Electrical.

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5.1kWh Solar Battery Package

BYD Solar Battery Brisbane - First Home Buyer

GET STARTED WITH A BYD SOLAR BATTERY –  BRISBANE

BYD’S ENTRY LEVEL OPTION – THE CHEAPEST WAY TO GET SOLAR BATTERIES. (Upgradeable to 7.7kWh per stack)

  • BYD – 5.1kWh HVS Upgradeable Solar Battery

  • Fronius Gen24+ Inverter

  • Q Cells 390W Solar Panels

BYD Solar Battery Brisbane 5.1

Is a 5.1kWh solar battery big enough? Read about this easily upgradable Battery in Mark’s 5kWh BYD miniBLOG

5.1kWh BYD Solar Battery Brisbane

Perfect if you already have an existing Gen24 Solar System

5.1 kWh BYD Solar Battery

10 Year Warranty

from $7900 *

Including Black-Out Protection

Green Loans  available from $24 / week with no deposit

5.1kWh BYD Battery + 6.6kW Solar - Solar Battery Brisbane Package

5.1kWh BYD Solar Battery – 10 Year Warranty

5kW Fronius Gen24 PLUS  – 10 Year Warranty

17 x Q Cells Q.Maxx – 15 Year Warranty

from $16900 *

Including Black-Out Protection

Green Loans  available from $47 / week with no deposit

* Indicative prices based on a standard installation

* Prices are with STC Rebate applied (AKA: Govt Rebate)

Did You Know?

BYD do not use Cobalt or Nickel in their home storage batteries. A more sustainable and ethical home storage solution. 

11kWh Solar Battery Package

BYD Solar Battery Brisbane - Professional Couple Package

BYD’S MOST UPGRADEABLE SOLAR BATTERY

SCALE UP YOUR BATTERIES AS YOUR ENERGY NEEDS GROW! (Upgradeable to 22kWh)

  • BYD – 11kWh HVM Upgradeable Solar Battery

  • Fronius Gen24+ Inverter

  • Q Cells 390W Solar Panels

BYD Solar Battery Brisbane 11

Discover how easily this battery can be upgraded, and which homes would best suit an 11kWh BYD battery. Read Mark’s 11kwh BYD miniBLOG

11kWh BYD Solar Battery Brisbane

Perfect if you already have an existing Gen24 Solar System

11 kWh BYD Solar Battery

10 Year Warranty

from $11900 *

Including Black-Out Protection

Green Loans  available from $29 / week with no deposit

11kWh BYD Battery + 7.8kW Solar - Solar Battery Brisbane Package

11kWh BYD Solar Battery – 10 Year Warranty

6kW Fronius Gen24 PLUS  – 10 Year Warranty

20 x Q Cells Q.Maxx – 15 Year Warranty

from $20900 *

Including Black-Out Protection

Green Loans  available from $51 / week with no deposit

* Indicative prices based on a standard solar installation

* Prices are with STC Rebate applied (AKA: Govt Rebate)

Did You Know?

BYD uses a safer battery chemistry than most other home storage solutions. LifePo (Lithium, Iron, Phosphate) is safer than NMC (Lithium, Nickel, Manganese, Cobalt). 

13.8kWh Solar Battery Package

BYD Solar Battery Brisbane - Three Kids and a Pool Package

There’s a BYD Solar Battery for all situations.

BYD’S UPGRADEABLE 13.8kWh BATTERY – SCALE UP YOUR BATTERIES AS YOUR ENERGY NEEDS GROW! (Upgradeable to 22kWh)

  • BYD – 13.8kWh HVM Upgradeable Solar Battery

  • Fronius Gen24+ SYMO Inverter

  • Q Cells 390W Solar Panels

BYD solar battery brisbane 13.8

Mark explains the advantages 3⏀ Fronius and BYD in a blackout. Read Mark’s 13.8kWh BYD miniBLOG

13.8kWh BYD Solar Battery Brisbane

Perfect if you already have an existing Gen24 Solar System

13.8 kWh BYD Solar Battery

10 Year Warranty

from $13200 *

Including Black-Out Protection

Green Loans  available from $34 / week with no deposit

13.8kWh BYD Battery + 13.26kW Solar - Solar Battery Brisbane Package

13.8kWh BYD Solar Battery – 10 Year Warranty

10kW Fronius SYMO Gen24 PLUS  – 10 Year Warranty

34 x Q Cells Q.Maxx – 15 Year Warranty

from $27900 *

Including Black-Out Protection

Green Loans  available from $66 / week + $2790 deposit

* Indicative prices based on a standard solar installation

* Prices are with STC Rebate applied (AKA: Govt Rebate)

The most custom fit home storage solution.

byd-solar-battery-stacks-illustration-by-Elliot-Moss

5.1 to 57.9kWh

22.1kWh Solar Battery Package

BYD Solar Battery Brisbane - Large Family + Office Package

The maxed out BYD Solar Battery Stack

BYD’S 22.1kWh BATTERY – This stack is maxed out! But Don’t Worry, if this still isn’t enough you can have up to 3 x 19.3kWh Stacks! (57.9kWh)

  • BYD – 22.1kWh HVM Maxed Out Solar Battery Stack

  • Fronius Gen24+ SYMO Inverter

  • Q Cells 390W Solar Panels

byd solar battery brisbane 22.1

Who needs a 22.1kWh battery? How well does it work, and can I go bigger? Read Mark’s 22kWh BYD miniBLOG↓

22.1kWh BYD Solar Battery Brisbane

Perfect if you already have an existing LARGE Gen24 Solar System

22.1 kWh BYD Battery

10 Year Warranty

from $18900 *

Including Black-Out Protection

Green Loans  available from $52 / week with no deposit

22.1kWh BYD Battery + 19.5kW Solar - Solar Battery Brisbane Package

22.1kWh BYD Solar Battery – 10 Year Warranty

10kW Fronius SYMO Gen24 PLUS  + 5kW Fronius Snap Inverter – 10 Year Warranty

50 x Q Cells Q.Maxx – 15 Year Warranty

$ POA *

* Indicative prices based on a standard solar installation

* Prices are with STC Rebate applied (AKA: Govt Rebate)

Which BYD package is right for you?

⇓⇓  KEEP SCROLLING  ⇓ ⇓

QUOTE FORM

Everyone knows Fronius is the best solar inverter …

Discover why we are one of only TEN “Fronius Solution Partners Plus” in Australia – and how that benefits you!

Fronius Solution Partners Plus

GOOGLE REVIEWS

210 Reviews
Very professional team that understands the personal touch when dealing with clients. Terrific communications. Great workmanship for the installers. If you are thinking about solar think no further than MC Electrical.read more
Fred Cairns
Fred Cairns
23:43 24 Apr 20
What can I say but fantastic from start to finish. Speaking to people who know solar rather than just trying to sell solar makes a big difference. Had several quotes before a mate recommended MC electrical and all were about the same but MC actually took time to listen before suggesting what we might need rather than just telling me what I needed. After sales have been brilliant each person I’ve spoken to has been able to help with even my daft questions. Highly recommendread more
Tim Harries
Tim Harries
06:28 13 Mar 20
Can not recommend MC Electrical highly enough, they are absolutely first class in everything they do!From the highly knowledgeable sales person (Trent) who quoted on the system, to the exceptionally polite and professional installation team (David) and the wonderful post installation/after sales service (Cristy) who followed up to make sure we were happy with everything and there were no issues. These guys aren’t just about getting you to sign up they about providing service throughout. Our internet was down which meant that out Inverter was offline in terms of keeping track of our input/output (there was no issue with the system) and Cristy followed up to make sure there wasn’t an issue. Can not thank the MC Electrical team enough and would 100% recommend them!read more
Stephanie McPherson
Stephanie McPherson
04:18 05 Mar 20
MC Electrical was great to work with. At every step (sales, order, installation, after sales support) their employees were professional, friendly and communicative. All the people we dealt with went out of their way to ensure that we bought the system that would provide most benefit to us. Their systems may not be the cheapest, but taking into account the service we got and the quality of the products, it was money well spend. Mark's blog is honest and informative. You won't go wrong by following his advice.read more
Manda Meiring
Manda Meiring
00:47 29 Feb 20
System is far outperforming my expectations. Clearly identified my needs and advised on a really optimal solution. Salesperson, installation team and Mark excellent to deal with. Went over and above assisting me with extra electrical work I requested for an electric car charger at a fraction of the cost other installers had quoted. Would recommend to anyone.read more
Nathan Sullivan
Nathan Sullivan
04:39 21 Jan 20
The installation of our solar system was only bested by the professionalism of the staff from MC Electrical. From the initial consultation all the way through to the final connection of our solar system, MC Electrical were incredibly responsive and informative with all aspects of our system. I could not recommend them highly enough. If you're looking for a company who is professional, timely and informed by the latest industry standards, MC Electrical is the pick.read more
Scott Baker
Scott Baker
01:16 16 Dec 19
From start to finish of this process, MC Electrical has listened to my ideas, and provided information and advise around the best and most cost effective solution for my townhouse. The installation had some extra challenges, which were overcome efficiently and safely. I highly recommend MC Electrical for all your solar installation, upgrade and maintenance needs.read more
Alex Hassett
Alex Hassett
09:12 15 Dec 19
I've had a very positive experience with MC Solar & Electrical. The sales team were very thorough, reviewing my energy bills and house to design the perfect system. The installation was seamless and the installers were super considerate of keeping noise levels to a minimum when my noise-sensitive son was home during the morning. The after-sales service was also amazing, checking in with me immediately after the install to make sure I was happy with the service. All in all I would highly recommend MC Solar & Electrical. They truly are a premium installer and you absolutely get what you pay for.read more
Tim Dougall
Tim Dougall
10:30 09 Dec 19
WOW! Couldn't believe how great they are to deal with. Ben did a great job with a couple of options for me and explained it all very well. Communication and emails were excellent and I was kept well informed. Was recommended by a family member and I have since recommended them to a few people who are actually get there's installed soon ! They look great too !!read more
Vanda Silman
Vanda Silman
04:38 04 Dec 19
The team are great! They have been very informative and prompt from the get go.They are there when they say they will be. The after install updates have kept me up to date with step by step instructions. Would highly recommend.read more
Kay-T Halse
Kay-T Halse
22:33 19 Nov 19
We are very pleased with our new solar system. The team were a pleasure to have on site, and were willing to go any extra mile. We appreciated the good advice MCElectrical gave us, and their helpful manner throughout each process. We would thoroughly recommend this company - their work ethics are above reproach.read more
Janet Skerman
Janet Skerman
23:14 15 Nov 19
Highly recommend this company. A big thank you to Ben for his planning and design layout, to the installers, Craig, Dane and their team. Your professionalism and friendly manner within your team made this an enjoyable and positive experience. Thank you one and all.read more
Kerin Kelly
Kerin Kelly
02:37 13 Nov 19
Straight up, no nonsense. Nicole was bloody awesome and not pushy. basically, if you want them buy them, if not move on... Waited, got a few quotes and went back to MC Solar. 4 yrs now. 21 trouble free panels. 5.5kw of free electricity!read more
Jeremy Knight
Jeremy Knight
13:14 21 Oct 19
I did a lot of reviews and got a few quotes for systems. Throughout the sales processes, MC Electrical was honest and realistic about the system I needed and offered me clear insight into their thinking and my household circumstances. I ended up going with them for the following reasons:Mark's Blog -  he really understands solar and offers honest advice, Their longevity  in the marketplace - They only do solar and have done it for a long timeTheir warranty - they cover what they sell wellStaff - Everyone I spoke too and eventually worked with has truly being amazing to work with and all seem to love their company.The install too was faultless with a full team of around 6 working effectively to place the panels in the morning. I also required a meter box upgrade and they looked after everything to the highest of standards.I've had the system installed for 8 months now and could not be happier. MC Electrical have a great after sales team who even dealt with my questions mainly around understand and using the software and meter reading so I could better understand how to get the most from the system. Very patience and knowledge.I've just got my second quarter bill from my system and it's gone for $860 same time last year to $27read more
Paul Judge
Paul Judge
06:13 09 Oct 19
Excellent service and communication. We found the big difference between MC Electrical was that, unlike most solar providers who would try to dictate what you need without considering your circumstances, MC Electrical will listen to your needs and offer a system that will align to those needs. Another major plus is the aftermarket service. MC Electrical are available to ensure your system is running smoothly and answer any pay sales questions you may have. We speed around apt and found these guys are the best and we couldn't more highly recommend them.read more
Pat Moran
Pat Moran
22:52 03 Oct 19
Has been an excellent experience from quoting to completion. I highly recommend this solar installer.
Steve M
Steve M
01:09 02 Oct 19
Very happy with MC electrical. Sales was very professional, suppling lots of info and options to help find the right solution for a difficult roof at a competitive price. The installers had pride in their work and it showed in their attitude and work ethic. Coming from the service / installation industry I have high expectations in regards to quality and service, I was impressed with the install and highly recommend this supplier.read more
Tayla Jackson
Tayla Jackson
09:34 27 Sep 19
After getting numerous quotes amongst the haze of Solar options I settled on MC Electrical. From the start MC Electrical have been down to earth, honest, professional and so far, their after install service and support has been excellent. No upsell, clear in what I needed and willing to listen. Not the cheapest but definitely good value for money. I would recommend having a chat with the team for your Solar project.read more
Greg Price
Greg Price
23:27 29 Aug 19
From the consultation to installation and after service, MC Solar & Electrical has been professional and without any hassles at all. I am very happy with the whole team every step of the way. Excellent communication and follow up. They are very thorough and explained everything clearly to me and even showed some examples poor workmanship ( we spotted our neighbor had one example they explained!)You might find a lower quote with another retail/installers, but I highly recommend the peace of mind that comes with premium quality products and services with them because solar is a long term investment and over the course of 10-20+ years it is just not worth the uncertainty and hassle to save a few dollars. Arrange a meeting with them and you'll see first hand!read more
Barney Chen
Barney Chen
22:00 29 Aug 19
Fantastic, This team were only ones to actually come out and provide an extensive free written quote. They explained everything, booked us in arrived on time, cleaned up after themselves and didn't break any tiles on the roof during install and offerred post installation support. Very friendly service that ran like a well oiled machine with no issues wahtsoever. This is the way dealing with businesses should be. Very highly recomended. Thanks to the team.read more
Russell Sky
Russell Sky
21:07 11 Jul 19
From the initial contact, MC Electrical were professional and supportive. They provided information and guidance on a system that would meet our Solar objectives and budget. They were not pushy or making assumptions that they knew better what we needed.They listened to our requirements and objectives and worked with us to install a high quality solution. They also coordinated installation of the panel railings with a roof restoration, well before the panels were ready for installation. This helped to ensure the integrity of our roof paint membrane and reduced potential damage to tiles. The follow-up service to keep us informed of every step, and coordinating with our electricity provider has been great. I highly recommend MC Electrical for their service, knowledge and professionalism.read more
Lowie & Mark Forwood
Lowie & Mark Forwood
22:50 24 Apr 19
high quality products, incredible customer service and support. They came to our house to inspect the site and have a chat to understand our energy needs to make a tailor made quote. Their presentation was extremely detailed and we felt confident in their support from day one. One month after installation and the support is still there in helping choosing the provider with the best deal on the market. Worth every cent. Thank you Mc Electrical!read more
gavino beddu
gavino beddu
08:58 03 Apr 19
Terrific service. Not the cheapest but by far the most proficient and complete and professional service of the companies I engaged. Trent particularly managed the process well and I am very pleased with the performance of my system 1 year on. Finally a company that does value and practice after sales engagement and service.read more
Shannon Hobbs
Shannon Hobbs
20:27 19 Mar 19
Recently had solar installed by these guys. After alot of research I decided on MC Electrical. Not the cheapest but I had most confidence in them from the start. Smooth process from sales through install and after sales support. Their install staff were exceptional working in very hot conditions and just getting on with it. Cannot recommend highly enough. In a market where there are plenty of cowboys they have delivered.read more
Owen Davies
Owen Davies
10:12 01 Mar 19
Very happy with MC Electrical. They provided a quality system at a really good price. Loved the amount of information that have on their website and the obvious passion and knowledge displayed by the owner and staff. There is a lot of information on the internet about solar and it is very difficult for a consumer to interpret what is there and apply that to what they need. Jaime from MC Electrical spent a lot of time with us to help match us with the right combination of products to come up with a system that we could afford and that would meet our needs. I feel confident that we will have a great system, that will last us for many years, that will significantly reduce our energy costs and that will be backed up by great support. Thanks Jaime and MC Electrical.read more
Alessandra Liussi
Alessandra Liussi
06:46 13 Feb 19

Marks BYD Solar Battery Mini Blog

The First Home Buyer Package

5.1kW BYD Solar Battery Brisbane Price: from $7900

Load profile: 8kWh/day, 8Kwh/ night
$450 power bill 

Proposed System
5.1kWh Upgradable BYD Battery Box
5kW Fronius Primo Gen24 inverter
6.6kW Solar Panels 

This is a small battery suited to a customer that just wants a bit of backup power in case of a blackout, or a customer who is conservative with evening power usage and wants to avoid the peak demand tariff. 5kWh is the smallest battery BYD offers. Anything smaller would be a token toy. This battery is a good entry level size from the Electric Vehicle company that started out as a battery maker in 1995. The battery can easily be upgraded when you have data from your Fronius monitoring, and a bit more cash in the bank.  

Ballpark Average Solar Production
30kW Summer, 18kW winter 

To future proof a little, you could easily install a 6kW inverter & 7.9kW of panels to add 20 percent more production. 

Battery capacity
Usable storage = 5.1 kWh
Fastest charge rate = 4.49kW.
Continuous discharge = 4.49kW (plenty for a smaller battery) 

If you use a conservative amount of power during the daytime (8kWH) you will still be able to fully charge this battery on a mid-winter’s day. Even for humble households, the battery will fully discharge most nights. That’s getting great use out of your solar battery and it will not affect your warranty. 

Savings
The 5.1kWh BYD Battery Box is warranted for 15410kWh of usage, or almost one cycle a day for 10 years. If you calculated your savings on a traditional Brisbane tariff this system would save you a maximum of $2200 in its warranty period. However, in 2022, Queensland is rapidly changing to “Demand tariffs” where you are penalised for using power between 4pm and 9pm. Using your stored solar power during that time could save you significantly more. More importantly, your first home will be closer to being independent of coal fired electricity and your lights and power will work in a blackout. 

Blackout
You’ll want to decide if you are going to set a “reserve” limit on the battery. If you set a 2kW reserve, then you will be guaranteed of at least 2kW in a blackout. However, then your solar battery will only have 3.1kWh to charge and discharge each day. 

Max discharge during a blackout is a huge 4.49kW. However, to prevent the solar battery from discharging too quickly during a blackout, it may be wise to have just one light circuit and the kitchen power points only. 

Upgradeable Battery
At any time, you can easily add one more battery module to make your BYD solar battery 7.7kWh. This can be done now, or later. 

You can then add a second or third stack of batteries to give you 15.4kWh or 23.1kW of storage. Each stack will require its own battery management unit. If you plan on upgrading to more than 7.7kWh of solar storage, you may be better off starting out with our next package, the more easily expandable 11kWh battery. 

The Professional Couple Package

11kWh BYD Solar Battery Brisbane Price: from $11900

Load profile: 6kWh/day 14kWh/night
$600 power bill 

 

Proposed System
11kWh Upgradable BYD Battery Box
6kW Fronius Primo
7.8kW Solar Panels

The 11kWh BYD battery uses a lower battery module voltage than the 5kWh battery, allowing you to stack more modules in one stack. This package is a large storage system on a smaller solar system. It would be great for the couple who is at work by day and runs the air conditioner by night. If you are uncertain about your energy consumption patterns, we’d recommend installing solar first, and using the Fronius monitoring tool, so we do not unnecessarily oversize your battery. It is fine to undersize with BYD, as it can be retrospectively upgraded in 2.5kWh increments. If you happen to oversize the battery, you can just set your blackout “reserve limit” higher.  

BYD is a company that Warren Buffet bet big on in 2008. It hasn’t let him down. 

 

Ballpark Average Solar Production
36kW summer, 22kWh Winter 

Battery capacity
Usable energy = 11kWh
Fastest charge rate = 4.49kW
Continuous discharge = 4.49kW (just a tad less than a Tesla Powerwall) 

Savings
It is warranted for 34150 kWh of usage. If you calculated savings on Brisbane’s historical tariffs the 11kWh BYD battery would save you a maximum of around $4800 in its warranty period. However, Queensland is rapidly changing to “Demand Tariffs”, where you are penalised for drawing power in the evening. A correctly sized battery will protect you from these demand tariffs and potentially save you a lot more. 

If you chose a 6kW inverter, you are much less likely to waste energy by “export limiting”. More of your solar can be harvested, saving you a little bit more money. But solar batteries are less about savings & more about energy independence – and electricity stability.
 

Blackout
If your main aim is to have solar storage for a blackout, you may want us to set your battery to discharge to no more than 2kWh in normal operation.  While this will ensure you always have some reserve power in a blackout, it will naturally limit the normal nighttime battery capacity. It’s a tradeoff. The chances are – your battery will not be completely flat when a blackout occurs anyway. 

Max discharge rate is a healthy 4.49kW total, and a max of 3.68kW per phase. A conservative Brisbane couple could potentially back up their whole house with this – including your hot water. You may just want to manually turn off your hot water and air conditioning during a blackout if your battery charge gets too low. 
 

Upgradeable
This solar storage battery can easily be upgraded to 13.8kWh, 16.6kWh, 19.3kWh or even 22.1 kWh. You could also install a second stack of solar batteries, but that wouldn’t make much sense with a smaller solar system. Maybe you should plan ahead for a baby. 

Three Phase and a Baby Package

10.2kW BYD Solar Battery Brisbane Price: from $11500

Load profile: 12kWh day, 10kWh night
$650 power bill 

Proposed System
10.2 kWh BYD battery
6kW Fronius Symo Gen24
7.9kW Solar Panels 

This BYD solar battery Brisbane system allows for a healthy 7.9kW solar system and a decent sized battery. With a three-phase home, you will want the Fronius & BYD option over any other for the reasons explained below. If you have a small family household with some daytime usage, a 7.9kW solar system should be able to charge a 10.2 kWh battery most of the year-round. It may be wise to install solar before the battery, so we can use your Fronius data to ensure we don’t oversize the battery. 

 

Ballpark Average Solar Production
36kW summer, 22kWh Winter 

 

BYD Battery Statistics
Usable energy = 10.2kWh
Fastest charging rate = 6kW
Continuous discharge = 6kW or 3.68kW/phase 

Savings
The BYD Battery Box is warranted for 30820 kWh of usage which in the past would have worked out as a maximum saving of $4300 in its warranty period. However, with Queensland’s new “Demand Tariffs,” you are charged a higher rate for using power in the evenings. If you eliminate your evening load with a battery, your saving could be significantly more than they would be otherwise. Nevertheless, batteries are still mainly about protecting yourself from future energy hikes, being mostly independent of the grid, and having power in a blackout.
 

Blackout
The advantage of Fronius & BYD on three-phase is a no brainer. If you have a blackout during the day, your solar panels will keep charging the battery. You would think you can take this for granted – but it does not work that way with the majority of 3 phase battery solutions.  

Additionally, during a blackout you will be able to supply a three-phase load such as an air conditioner. That would work just fine during a hot summer’s day while your solar is continually topping up your battery for nighttime use. 

If you are concerned about having power in a blackout on a stormy day, you may want us to set your battery to discharge no further than 2kWh. This will ensure you always have some reserve power in a blackout, but it will limit your discharge capability during normal operation. 

Maximum discharge in a blackout is 6 kW over 3 phases. However, each phase is limited to 3.68kW. While this won’t affect your savings while connected to the grid, you won’t be able to go crazy with hot water and air-conditioning on the same phase. It may be safer to leave your hot water off backup. 

 

Upgradeable
To upgrade this battery, you would need to buy another battery charging module (BMS). You could upgrade to 15.3kWh (by splitting the first stack) or to 20.2kWh (by adding a completely new stack.)  

However, if you wanted the option of upgrading, you may be better off starting with the 11kWh battery. And if roof space permits, you might want to consider a second or third kid. 

Three Kids and a Pool Package

13.8kW BYD Solar Battery Brisbane Price: from $13200

Load profile: 16kWh day, 20kWh night
$800 power bill
 

Proposed System
13.8 kWh BYD battery
10kW Fronius Symo
13.3kW Solar Panels 

This BYD solar battery Brisbane system allows for a three-phase family sized solar system and a battery that will cover most of your nighttime load. With your pool running during the day, and kids home at 3pm and school holidays, you will use a significant amount of solar during the day. The larger 13.3kW solar system may be needed to ensure your battery gets charged each day.  

As I’ll explain below, the three phase Gen24 / BYD combo has significant advantages over most other battery systems.
 

Ballpark Average Solar Production
60kW summer, 36kWh Winter
 

Battery Capability
Usable energy = 13.8 kWh (bigger than the Tesla Powerwall)
Fastest charging rate = 5.63kW (faster than the Tesla Powerwall)
Continuous discharge = 5.63kW (higher than the Tesla Powerwall). 

Savings
It is warranted for 42690kWh of usage. If you worked out your savings on the old Brisbane and surrounds tariff structure this battery would save you around $6000 in its warranty period. However, South East Qld is changing to a demand tariff structure where you are penalised for using grid power in the evening. Depending on the energy plan you choose, and your usage patterns, a battery can save you significantly more when you cook dinner for the kids using your stored solar power. More importantly, you can say goodbye to future blackouts. 

 

Blackout
The advantage of the Symo Gen24 is your panels will keep charging the solar battery in a blackout. Most other 3 phase inverter + battery solutions (e.g: Tesla Powerwall) will inconveniently disengage the solar panels when you have lost grid power. 

Max discharge in a blackout is a healthy 5.63kW over three phases and 3.68kW maximum per phase. Assuming you are sensible in a blackout, you could potentially back up your whole house. You may just need to downsize any large 3.6kW hot water elements. Whole house backup is not recommended with other inverters (eg Sungrow), because you could overload the inverter while connected to the grid. 

The Fronius Gen24 inverter can also uniquely supply 3-phase power in a blackout – but with a 13.8kWh battery, and the limited 5.63kW discharge rate, you wouldn’t want to run your ducted air-conditioning for extended periods. – unless it was a sunny Brisbane day.

If you are concerned about being self-sufficient in a blackout during stormy weather, you can always upgrade to another solar storage module down the track and set a minimum reserve capacity for blackouts. 

Upgradeable
This BYD solar battery is easily upgradable to 13.8, 16.6, 19.3 or 22.1kWh by simply adding extra battery modules. This will also significantly increase your discharge rate. You can go even higher by adding a second or third stack of batteries, but if you do that, you’d probably want more solar too. 

The Large Family with Home Office Package

22.1kW BYD Solar Battery Brisbane Price: from $18900

Load profile: 40kwh a day, 30kWh at Night
$1600 power bill

Proposed System
22.1 kWh BYD solar battery
10kW Fronius Gen24 + 5kW Fronius Snapinverter
19.9kW Solar Panels 

This BYD solar battery Brisbane system is for a three-phase large family solar system with a battery that won’t quite cover an average summer’s night. The Solar is maxed out, and depending on seasonal household consumption, it may still struggle to fully charge your solar storage battery regularly in wintertime. Any load profile is hard to guestimate. Instead of installing a 22.1kWh BYD battery on the same day as your solar, I’d suggest you install an 11kWh battery, and wait 12 months for your Fronius monitoring data.
 

Ballpark Average Solar Production
90kW Summer, 54kW winter
 

Battery Capability
Usable energy = 22.1 kWh
Fastest charging rate I = 9kW
Continuous discharge = 9kW (3.68kW/phase) 

Savings
The 22.1kWh BYD Battery box is warranted for 68310 kWh of usage. If you worked out your savings on the old Brisbane tariff structure this battery would save you around $9500 in its warranty period. However, depending on the new Demand energy plan you choose, a battery can save you significantly more because you won’t need to rely on the grid at peak times. More importantly, you’ll be less affected by blackouts. 

 

BYD in a Blackout
One reason I recommend the Fronius Symo Gen24 is because your panels will keep charging the solar battery in a blackout. Believe it or not, most other 3 phase inverter + battery solutions are useless for an extended blackout, because they can’t keep charging your battery from your solar panels when grid power is lost. (e.g: Tesla Powerwall) 

The maximum discharge with this system in a blackout is a healthy 9kW over three phases and 3.68kW maximum per phase. Unlike the Sungrow RT Hybrid inverter, this Fronius/BYD combo could backup a large house. We would just need to be careful of balancing large hot water systems for off grid mode, and you’d need to use common sense about the solar storage battery charge levels. 

The Fronius Gen24 inverter can also supply 3 phase power such as ducted aircon in a blackout – and with a 21kWh battery, and a 9kW discharge rate, you could get away with it if you were not running other heavy loads at the same time. 

Upgradeable
To upgrade this solar battery, you would need to add another BMU (battery management unit) but you could increase the solar storage in 5.5kwh increments by adding old batteries with the new stack. This would also increase your charge and discharge rate to 10kW. But why not go the whole hog – and be prepared for the worst! 

Armageddon Prepper Package

57.9kWh BYD Solar Battery Brisbane Price: $POA

Load profile: 20kWh a day, 30kWh a night
$1100 power bill 

Proposed System
57.9 kWh BYD solar battery (3 stacks of 19.3 kWh)
10kW Fronius Gen24 + 5kW Fronius Snapinverter
19.9kW solar panels 

If you are a serious prepper, you would not purchase such a large battery system without 6 to 12 months of monitoring with solar installed. When installed, you would still want to keep around 20 kWh of this battery in reserve for a blackout or WWIII. Not fully discharging your battery would also make it much more likely to charge your battery back to a healthy state on an overcast day. 

If you are the energy-guzzling family; you may not always have enough energy to fully charge this solar battery. If the solar storage is not fully charging at least once a week, we’d suggest increasing the reserve power limit, so your battery does not degrade too quickly. 

As a prepper, you will want proven reliability. BYD makes the world’s largest electric buses. They’ll work just fine powering your home.
 

Ballpark Average Solar Production
90kW Summer, 54kW winter 

 

Battery Capability
Usable energy = 57.9 kWh
Fastest charging rate = 10kW
Continuous discharge = 10kW (3.68kW/phase) 

 

Savings
It is warranted for 179310 kWh of usage. If you calculated savings on a traditional 8-cent feed-in tariff this solar battery alone would save you around $25 000 in its warranty period. However, all Brisbane homes will soon be on a “Demand Tariff,” where you are penalised more for using power between 4pm and 9pm. This is when a battery can offer significantly higher savings while minimising your impact on the grid’s peak demand. More importantly, your family will be ready for the zombie apocalypse. 

 

Blackout
If you want a guarantee of power when that day comes, you will want to set a reserve power limit on your solar battery. However, assuming you have some sunshine, a battery and solar system this size should be able to keep you comfortable for many weeks without grid power. 

Max discharge rate in a blackout is a huge 10kW, or 3.68 kW per phase. The Fronius Gen24 inverter can supply 3 phase power in a blackout – so you will even be able to run three phase loads in a blackout – such as a bunker air filtration system. 

Unlike most 3 phase solar battery storage systems, your Gen24 inverter will keep charging the BYD battery in a blackout. Almost every other 3 phase battery solution cannot keep a 3-phase solar inverter online – so you wouldn’t last without grid power for more than a day. 

Upgradeable
Congratulations. At 57.9kW kW, you have realistically maxed out your BYD solar battery capacity.

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