Your solar energy. Ready when you need it.
GoodWe and Sigenergy battery storage for new solar systems and battery retrofits across Sydney and NSW. Book a compatibility check with NJC Solar today.
New solar + battery systems
A thoughtfully designed battery system can store solar energy for later use and help manage reliance on the grid. We assess your household or business energy use, available space and goals before recommending a configuration.
Already have solar? Let’s talk retrofits.
We assess your existing panels, inverter and electrical installation to understand whether a battery retrofit is suitable. Compatibility matters: we explain any equipment changes before you decide.
Quality battery systems
We install GoodWe ESA battery modules with GoodWe EHA/ETA inverters, and Sigenergy battery modules with Sigenergy controllers. Product choice and system configuration depend on your property and requirements.
Who battery storage suits
A battery is often worth considering if your solar system sends a lot of energy to the grid during the day while you use more in the evening, if you are planning an electric vehicle, or if you would like some essential circuits supported during an outage where the design allows. It is not the right step for every home, and we will tell you plainly if we think your money is better spent elsewhere first.
How we assess your battery
We look at how and when you use electricity, the size and age of any existing solar, your switchboard, and where a battery could be installed in line with manufacturer requirements and Australian Standards. We then explain the options, including capacity, placement and backup arrangements, before you make any decision.
Living with your battery
After installation, the monitoring app lets you see when your solar is charging the battery, when the battery is supplying your home and how much energy is drawn from the grid. We show you how to read it, explain any settings that suit the way you use power, and remain available if you have questions as the seasons change and your usage shifts over time.
Why choose NJC Solar for your battery
Your battery is installed by our employed in-house NSW team, set up with its monitoring app and handed over with a clear explanation of how it works. Systems purchased directly from NJC Solar include our 15-Year Workmanship Warranty and 5-Year No-Cost System Resolution Guarantee, alongside the separate manufacturer warranties.
What’s included
Compatibility check
Existing panels, inverter and switchboard assessed for retrofits.
GoodWe and Sigenergy systems
GoodWe ESA with EHA/ETA inverters, or Sigenergy modules with Sigenergy controllers.
Configuration explained
Capacity, placement and backup options discussed in plain English.
Careful installation
Installed by our employed in-house NSW team.
App and monitoring set-up
We help you understand how to view your system.
Brands we install
How it works
- Step 1
Let’s talk
We listen to your needs and answer your questions.
- Step 2
Designed for you
A custom design and clear quote, with the details explained.
- Step 3
Installed with care
Professional installation by our employed NSW team.
- Step 4
Support that stays
A proper handover and a team you can turn to afterwards.
Recent work
Your questions, answered.
Can I add a battery to my existing solar?
It may be possible. We need to check your existing equipment, electrical installation and compatibility before recommending a retrofit.
Will a battery provide backup during a blackout?
Backup capability depends on the equipment, system design and electrical configuration. Tell our team which circuits matter to you so we can assess appropriate options.
Which battery size is right for me?
There is no single answer for every property. Your electricity use and solar generation help us assess a suitable system.
Where can the battery be installed?
Placement depends on the manufacturer’s installation requirements, Australian Standards and your property. We discuss suitable locations during the site assessment.
Backed by our warranties
15-Year Workmanship Warranty and 5-Year No-Cost System Resolution Guarantee, alongside separate manufacturer warranties. Applies to systems purchased directly from NJC Solar. Terms and exclusions apply – ask our team for full warranty terms.
About our warrantiesRelated services
Ready for cleaner, more affordable energy?
Let’s find the right solar, battery or EV charging solution for you.