How we compared
Like-for-like in the 100–105Ah class. All four are 12V LiFePO4 with a built-in BMS. They are ranked on usable capacity, continuous discharge current, weight and price per amp-hour, using each maker's own UK page (checked June 2026). 'n/s' means the figure was not stated on the page.
Usable capacityContinuous dischargeOnboard weightWarrantyPrice / Ah
The measured comparison
| Product | Capacity | Continuous discharge | Weight | Warranty | Price | Source |
|---|---|---|---|---|---|---|
| Fogstar Drift 105Ah Best value UK-designed · EVE grade-A cells | 105Ah / 1280Wh | 100A | 10 kg | 10 yr | £319.99 | verified · 06-26 |
| Roamer SMART 105Ah premium UK brand · 300A BMS | 105Ah | 300A | 11 kg | 12 yr | ~£485* | provisional · 06-26 |
| Renogy Core Mini 100Ah compact · low-temp protection | 100Ah | n/s | n/s | n/s | £169.99 | verified · 06-26 |
| Renogy Core Mini DuoHeat 100Ah self-heating for winter charging | 100Ah | n/s | n/s | n/s | £209.99 | verified · 06-26 |
Verdict — best value vs premium vs budget “For most UK builds the Fogstar Drift 105Ah is the pick: UK-designed, grade-A cells, 100A continuous and a 10-year warranty at about £3.05/Ah. The Roamer SMART earns its premium only if you need its huge 300A discharge for a big inverter — its UK price is listed in dollars, so treat it as provisional. The Renogy Core Mini is the cheapest way in at £169.99, and the DuoHeat version is the one to buy if you charge below freezing in winter.”
The real cost of the stack
Fogstar Drift — price per amp-hour
≈ £3.05/Ah
Derived from the verified £319.99 / 105Ah. The benchmark the others are measured against.
Renogy Core Mini — entry point
£169.99
Cheapest verified 100Ah LiFePO4 in the comparison; DuoHeat self-heating version £209.99.
ⓘ Affiliate disclosure. This page contains affiliate links (Fogstar, Renogy, Roamer). We may earn a commission at no extra cost to you. The ranking comes from spec comparison and field use, not commissions.