How much does a Sigenergy battery cost in Adelaide?
On typical NG Elec jobs in 2026, Sigenergy added to existing solar came in at about $500 to $600 per usable kWh, after rebates, incl GST. Real examples, after rebates, incl GST: Noarlunga Downs, 26 kWh, three phase, whole-home backup, about $14,600. Beaumont, 52.6 kWh, three phase, two inverters, about $30,500. A 52 kWh three phase setup is typically about $26,000 to $30,000. Every quote is itemised and free.
How much is new solar with a Sigenergy battery?
It depends on system size. Hayborough, 18.3 kW of solar with 35 kWh on three phase, was about $28,700 after rebates, incl GST. Kangaroo Island, 8.7 kW with 26 kWh replacing an old system, was about $24,900. See our solar and battery prices for the wider ranges.
Why is Sigenergy dearer per kWh than GoodWe?
On our jobs it usually is, often by $100 or more per usable kWh. You're paying for the stackable design, one maker for inverter, battery and gateway, and how well it scales on large and three phase systems. If you just want the most storage for the money, GoodWe is often the better value. We'll quote both if you ask.
Does Sigenergy qualify for the battery rebate?
Eligible SigenStor models qualify for the federal Cheaper Home Batteries Program, which we apply through STCs on your quote. The battery must be VPP-capable, but joining one is optional. Full rate applies up to 14 kWh, 60% from 14 to 28 kWh and 15% from 28 to 50 kWh, so a big stack gets less rebate per kWh at the top end. Our rebate calculator shows how much you'll get.
How does Sigenergy work with the free Solar Sharer hours?
If you choose a Solar Sharer plan, grid power is free from midday to 3pm in SA, up to 24 kWh a day. When we commission your battery we can set it to top up from the grid in that window, then run the house through the evening peak. Those plans often have higher supply and peak rates, so compare the total cost first.
Can I add more Sigenergy modules later?
Usually, yes, as long as the inverter has capacity for more. We size the inverter with that in mind if you tell us you might add an EV or more load later. Keep in mind that modules added after a rebate step-down get the lower rate.
What warranty comes with Sigenergy?
Check the current manufacturer warranty on the datasheet we send with your quote, as terms change. We register the warranty for you at install. NG Elec also gives a lifetime workmanship warranty on the installation.
Sigenergy, GoodWe, Sungrow or Tesla: which should I get?
Sigenergy suits big, three phase or expandable systems. GoodWe is usually the lowest cost per kWh on our jobs. Sungrow makes sense if you already have a Sungrow hybrid. Tesla Powerwall suits people who want a single unit. Our best battery guide compares them side by side.
