1536Wh
USABLE CAPACITY
GridFree
GridFree 1500
4.5 · 1.1K reviews
A roomy 1.5kWh middle child with strong output and app control. The pick when the 1kWh feels tight but 2kWh is overkill.
£1,099
typical online price
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The specs that matter
Capacity
1536 Wh
Output
1800 W
Surge peak
3600 W
Weight
33 lb
Solar recharge
1.9 h
Cycle life
3,500
Chemistry
LiFePO4
Rating
4.5 / 5
What’s great
- 1,800W runs almost anything portable
- App scheduling and monitoring
- Balanced size-to-capacity ratio
Worth knowing
- App can be fiddly to set up
- No wireless charging pad
Sunny’s verdict
A confident middle option — more headroom than the Helios, less heft and cost than the SunVault.