GROWATT HELIOS 3600 review
GROWATT HELIOS 3600 Power Station (3,686Wh)
By Tom Calder
3,686 Wh of LFP (Amazon rounds it to 3,600 Wh) and 3,600 W at 120V, with Growatt's Watt+ mode boosting to 4,500 W, 2,000 W of solar input and a 15 ms switchover. Two units with Growatt's split-phase connector give 240V and 7,200 W.
- Best for
- A 3.7 kWh unit that pairs up for 240V
- Skip it if
- You need 240V from one box
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 3,686 Wh, 3,600 W
- 2,000 W solar input
- 5-year warranty
Worth knowing
- 240V only with two units
- About 99 lb
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Who shouldn't buy this
Don't buy it if you need 240V from one box.
Key specs
| Battery (as sold) | 3,686 Wh |
| AC output | 3,600 W |
| 240V | Only with two units and Growatt's split-phase connector |
| Expands to (maker) | 36 kWh (Growatt's figure; per-unit limit not stated) |
| Warranty | 5 years |
| Runs (our estimate) | Fridge 1.2–2.7 days; fridge + furnace fan 4.1–5.7 h; well pump 2.8–3.7 h running (120V pumps only) |
| Connecting to the house | Plugs in; Growatt's pages name no home panel |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for A 5 kWh, 240V start with its own 10-circuit panel
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for 5 kWh and 240V in one 97 lb box
See the comparison →Best for 7,200 W at 240V from a single box
See the comparison →