Brand
Folding panels and lithium batteries
A panel to collect and a battery to keep, which is the whole of an off-grid system in two products.
Lithium iron phosphate gives up some energy density in exchange for thermal stability and cycle life. It tolerates being left partly charged, delivers most of its rated capacity rather than a fraction, and survives several times as many cycles as lead-acid.
In a vehicle or a cabin, those three things matter more than weight per watt-hour.
Usable depth. A lead-acid bank is conventionally taken to half its rating before damage starts; a LiFePO4 bank goes far deeper. Two batteries with the same printed amp-hours can differ by a factor of two in what you can actually take out.
Read against the figures a portable panel is bought on: wattage under stated conditions, folded and unfolded size, weight, and what regulator is in the box.
Where a listing gives a cell efficiency rather than a module efficiency, and where a wattage is quoted without the light conditions behind it.
100 W peak · conditions not stated · monocrystalline · up to 23 % · no voltage published · USB-A 5 V 2.4 A and USB-C 5 V 3 A · folded size not published · no ingress rating
A 100 W monocrystalline folding panel with one USB-A and one USB-C output, quoted at up to 23 % efficiency, whose listing publishes no voltage, no dimensions and no ingress rating.
Best for: Charging phones, tablets and cameras directly, away from any power station.
≈ €70
200 Ah at 12.8 V, 2560 Wh · 100 A BMS, 100 A continuous charge and discharge · 1280 W maximum charge power · 5000–15000 cycles at 100 % DoD · 24 kg · 4S4P expandable
A 12.8 V 200 Ah LiFePO4 battery with a 100 A BMS, published as 2560 Wh, rated for full-depth cycling and expandable to a 51.2 V 800 Ah arrangement.
Best for: A fixed off-grid installation where the bank will be built up over time and physical fit is not constrained.
≈ €250
A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.
