Call for a free quote 1300 669 256 | Drought affected? We are trying to help. (Click here to find out how)

Save up to $193,620.00!

Retrofit Battery Storage Kit for existing Solar PV Systems



Retrofit Battery Storage Kit for existing Solar Systems

At Commodore Australia we’re proud to offer the very latest and safest in lithium battery technology from BYD with the new B-Box / SolarBatt Kratos modular lithium battery system. Paired with the time proven Victron Inverter Charger hardware, this package brings the best modern renewable energy technologies together for a fully expandable ‘grid hybrid’ solar power energy storage solution – which is also completely suited for off grid use.

Increase the effectiveness of your existing solar PV system using this energy storage system add-on or retro-fit kit. Designed for existing ‘grid tied’ solar PV systems, this kit will enable energy storage from your existing solar system for use at night time and in times of peak demand. Energy from your solar panels will power your household loads as first priority, and any excess energy is stored in the battery. Once the battery is full, any excess power from the solar panels can still be exported back to the grid for feed-in tariffs.

Based on the rated performance and upfront cost, the BYD / Kratos Lithium batteries deliver an exceptional cost of ownership of approximately 15 cents per kWh. This compares favorably to the typical and rising cost of mains power of around 28 cents per kWh.

The BYD / Kratos battery bank is made of a specially designed cabinet fitted with up to 4x 2.56kWh battery modules, which are rated to 6000 cycles to 96% Depth Of Discharge (otherwise called DoD). The battery bank can be expanded up to 80kWh total capacity (32x modules in 8 cabinets). These modules can be added at any time to expand the capacity of the system. They have a constant power rating equal to their capacity – 2.5kW each – making them very suitable for off grid and high demand applications. Many lithium battery types are limited to much lower constant power ratings.

Detailed solar, battery & system information is displayed on the Victron Colour Control GX system display panel. Once connected to the internet, this info call also be viewed on on your smartphone or PC. Please check the ‘More Information and Downloads’ tab for brochures and detailed specifications.

The system can be expanded at any time in the following ways

  • Up to 80kWh battery storage – using 2.5kWh modules & 1x cabinet per 4x modules
  • Up to 6x Inverter Chargers for up to 30kVA rated output power – set single phase or 3 phase
  • Add more solar panels – within sensibility, basically an unlimited amount of solar power can be installed, adding more MPPT solar controllers as required & setting charge limits appropriate for the battery bank.

Package includes:

  • BYD / Kratos Lithium Battery bank and Cabinet (select capacity from drop-down menu above)
  • Victron MultiGrid 3KVA Inverter Charger ( or larger – select from dropdown menu)
  • Victron Colour Control GX System Monitor with Online Access
  • Cabling and Fuses to suit.
  • Energy Meter to manage import/ export of power from the grid

Create a Grid-Hybrid system, where your Solar energy is used & stored as first priority. Power will be supplied primarily from the solar panels & battery bank. If there is insufficient power, the inverter supplements power using the Grid AC power supply automatically. This design principle uses your solar & stored energy first before using the mains grid power. This can be more feasible than the low grid feed-in tariff typically on offer. Victron’s Battery Safe feature can retain a set minimum amount of charge in the battery bank, utilising the mains to keep the battery operating in the optimal safe range. A generator can be used in place of grid power for charging the batteries and running loads in the event of a few cloudy days or some heavy power usage.

Warranty Information

Peace of mind is an important facet of living self sufficiently or off grid. The Victron hardware is covered by an outstanding 5 year replacement or repair warranty. The BYD B-Box / Kratos Lithium battery system features an outstanding 10 year warranty, and is constructed of the safest and best performing lithium battery technology – Lithium Ferrous Phosphate (otherwise known as LiFePo4 / Lithium Iron Phosphate or LFP).

  • All Victron components have a 5 year full warranty
  • BYD / Kratos lithium battery system has a 10 year warranty
  • All other items come with a minimum 12 month warranty

For more information see manufactures warranty, found on each brand website.

Weight6 kg
Dimensions2 × 2 × 2 cm

More information & Downloads

Click here for a BYD / Kratos introduction & Lithium battery type comparison sheet.

Click here for more info on the Colour Control GX

Click here for more info on the Victron MultiGrid Inverter Charger

Click here for the full BYD Modular Lithium battery system brochure


Quality Support

Over phone, e-mail or in person.


Free Quote

Call for free quote.


Free Shipping

Free shipping on many items.