3 Phase Battery Backup for your existing Solar System “With Victron Transformer”




If you’ve already got a 3 phase Solar system on your roof but your sick of increasing power outages or the feed in tariff’s receiving another cut then a great way to combat this is by adding batteries to your existing Solar system. We do this by using 3 x off grid Multiplus II 5kVA inverter chargers for maximum power and performance when the power goes out paired with the safest and best performing BYD lithium batteries. This system comes with 5kWh of battery storage per phase, 15kWh of storage all up. If you have any questions at all please don’t hesitate to get in touch and we’ll be happy to assist you.

The difference between quality and cheap battery backup systems

When you’re adding batteries to your existing Solar system there are many ways to skin a cat, it is imperative to know the vast differences in types of lithium batteries and inverters that are available. It can look like you’re comparing apples with apples – as how hard can it be adding batteries to an existing Solar system. The reality is you can be comparing a Rolls Royce with a Great Wall and that will make a big difference to how your household reacts when the power goes out.

A true backup & energy storage system will have your house working exactly as it would when the power is off as what it would be when the power is on.

With a true ‘off grid inverter’ with the relevant grid approvals – that is how it works: in this case you have a fully off grid capable system that is normally connected to the grid. Using a Victron MultiPlus-II inverter charger, we transform our customer’s current Solar systems into fully independent off grid systems that are still connected to the grid, which can also still export power back into the grid for feed-in tariffs and use some grid power at times of low battery and sun.

With a ‘battery ready system’ most on offer include an inverter that can only give you half the available power of their usual capacity when the grid is down, and have no real surge capacity to start medium sized electric motors which means when the power goes out on a 45 degree day you can’t run your air conditioner or pump. The reason they have less power is because they don’t have an inbuilt transformer like an off grid Multiplus II inverter, this is where the real power comes from. If you just want to keep your fridge running and a few lights then it will be fine, if you want to be able to run your air conditioner, water pump or other power drawing items then an off grid capable system is the only way to achieve that.

There are two main distinctions amongst lithium batteries that you can use for your energy storage – grid-ready batteries and off grid batteries. Grid-ready lithium batteries such as LG, Samsung and Delta to name a couple have a different lithium battery chemistry which is a lot less stable and has a reduced longevity hence the price difference. These batteries have a chemistry of lithium cobalt or lithium nickel-cobalt-manganese. A less stable battery is far less safe when physically damaged or exposed to an electrical fault. On the other hand, lithium iron phosphate batteries are truly capable off grid batteries (such as BYD, GenZ and Powerplus), have been extensively tested with physical damage and electrical fault exposure to prove their safety, and also have far superior longevity or cycle life.

We hope that by providing more information on the different inverters and batteries that are available, you’ll be able to make an informed decision on what is best for your requirements and budget.

Package Includes:

  • Victron Multiplus II 5kVA inverter charger x 3
  • BYD 48v Lithium Batteries (3 x 5kWh of BYD batteries, total of 15kWh)
  • 2 x Battery cabinets to suit, cabinets can fit up to 4 batteries
  • Victron Venus GX system monitor
  • Victron Energy metre
  • DC cabling and fuses to suit
  • Safety label kit
  • Pre-wired and programmed board
  • Finance available – we have a fantastic finance guy that we work with regularly.

We can offer Subsidized freight with insurance to have the kits delivered on site or to a nearby freight depot. Installation solutions available in most areas.

Please note this listing does not include installation. Installations exceeding 500VA should be done by a qualified electrician, in accordance with electrical safety requirements of your state or territory.

Finance available for purchases over $5,000


Warranty Information

  • All Victron components have a 5 year full warranty
  • BYD Lithium batteries come with a 10 year warranty
  • All other items come with a minimum 12 month warranty

You are welcome to send any faulty goods back and our factory trained staff will either carry out or arrange the repair for you free of charge within the warranty period. Shipping is cost of buyer. Consumables, cables, leads, etc.. are not covered by warranty, negligence or misuse is a warranty exclusion. Commodore is not responsible for any direct or indirect expenses or losses related to warranty or non warranty.

Please note this listing does not include installation. Installations exceeding 500VA should be done by a qualified electrician, in accordance to electrical safety requirements of your state or territory.

Registered Responsible supplier with ERAC & Alternative Technology Association of Australia.

Additional information

Weight400 kg
Dimensions165 × 113 × 100 cm
Backup System with Batteries

7.5kWh BYD Battery Bank, 10kWh BYD Battery Bank

Victron Colour Control GX panel brochure

Victron 5kVA MultiPlus Inverter Charger brochure

Victron SmartSolar MPPT Solar controller brochure

Victron BlueSolar MPPT Solar charge controller (without internal Bluetooth)

Click here to download the Victron BMV-702 brochure.

Click here to download the Trina Honey Solar Panel brochure

Battery Warranty

Commodore Lead Carbon batteries come with a 3  year full replacement warranty.

For battery warranties click here


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  • 5 star review  We purchased a 15kw off grid system from Commodore shepparton and found the service second to none. Big shout out to Justin and Matt for their advice and... read more

    thumb Scott Middleton
    September 7, 2021

    5 star review  We purchased a Getaway Off Grid system with an additional battery pack lifting storage to 10.6 kWh. There were some initial difficulties with delivery because we are way off the... read more

    thumb Rob Edwards
    September 6, 2021

    5 star review  We purchased a 15kw off grid system from Commodore shepparton and found the service second to none. Big shout out to Justin and Matt for their advice and... read more

    thumb Scott Middleton
    August 24, 2021

    5 star review  Commodore Australia were recommended to us by someone in the area. The off grid system they have designed for us, we couldn’t be happier with. Living off grid is not... read more

    thumb Frank Ttt
    August 15, 2021
  • 5 star review  Thanks to all concerned.had off grid system install.everthing went smooth system is great easy to use.From start to finish was easy great information before going ahead.Web site has all the... read more

    thumb Graham Harvey
    August 4, 2021

    5 star review  I purchased a solar/240v hybrid bore pump and had a couple of issues getting the system up and running. I received great service and support from the whole team at... read more

    thumb Darren Gephart
    July 21, 2021

    5 star review  I was hesitant buying an off grid system from interstate as to whether any problems could be resolved over distance.I came across Commodore Australia and made the step to purchase... read more

    thumb Leo Berechree
    May 16, 2021

    5 star review  I've been dealing with Justin regarding an off-grid solar bore. The ease of communication, follow up and competitive pricing has been excellent. I have just ordered my recommended system from... read more

    thumb Jack
    December 15, 2020
  • 5 star review  I was impressed by how much I am saving with a solar pump from commodore solar compared to my diesel pump, it’s running as well as any pump I’ve had... read more

    thumb Thomas PHILLIPS
    October 19, 2020

    5 star review  Commodore Solar thank you very much for your professional advice and your on going support you guys have been Awesome. I would recommend this company 100% To anyone thinking about getting solar They are... read more

    thumb John Lukic
    October 15, 2020

    5 star review  Very good to experience great customer service in this day and age. I did have an initial issue previously that was addressed by Matt and am happy to recommend Commodore... read more

    thumb Paul Barry
    August 24, 2020