With the same 100A BMS, doubling the voltage from 12.8V to 25.6V doubles the continuous DC ceiling: 12.8V×100A = 1280W, while 25.6V×100A = 2560W. That is why this pack can run an 1800W appliance (1800 < 2560), whereas a 12V 100Ah tops out at 1280W and cannot. For the same wattage the current is halved, so the runs cooler and you can use thinner cables with less voltage drop. You pay about €120 more than the 12V 100Ah for that power headroom and the 2.56kWh of energy.

No. This is an 8S1P 25.6V pack that needs a 28.8–29.2V CC/CV charge profile (28.8V ±0.4V), with a 20V cut-off. A standard 12V charger finishes at roughly 14.2–14.6V — less than half of the required charge voltage — so it will never fully charge this battery and could leave the cells chronically under-charged. Use a dedicated 25.6V LiFePO4 charger rated 20–100A.

Yes. This pack is the direct replacement for two 12V 100Ah lead-acid batteries wired in series to make 24V. Those two lead-acid cells give about 1200 usable Wh at a 50% depth of discharge, while this LiFePO4 delivers the full ~2560 usable Wh near 100% DoD — roughly 2.1× the usable energy, in one 21.15kg unit instead of ~55–60kg of lead. Keep it on the 24V bus; do not parallel it with 12V packs.

It is valid: 1800W is below the 2560W DC ceiling, so it runs continuously rather than triggering the BMS. Dividing 2560Wh by 1800W gives about 1.42 hours. On the runtime table you also get 50W→51.2h, 300W→8.53h, 1000W→2.56h and, at the full 2560W ceiling, about 1.0h. Through a separate 24V inverter, derate by 90–95% efficiency and leave DoD headroom.

No. This is a single 24V-class (25.6V) bus — do not wire it in parallel with 12V packs, and do not treat it as a 12V parallel-bank replacement. When you expand, add units that are identical in model and matched within about one month of production / charge history. Mixing new and heavily-used cells in one bank causes imbalance and shortens life; keep the whole bank on the 28.8V charge profile with the 20V cut-off.

Two units in series (2S) give 51.2V and 5.12kWh — that is the common "48V" nominal setup, and it is the usual route if you need a 48V-class inverter. At the top end, 4P4S (four parallel × four series) = 16 units for 102.4V and 400Ah, i.e. 40.96kWh. Always match identical units within about a month before wiring them in series or parallel.

A 25.6V LiFePO4 charger delivering 28.8–29.2V CC/CV at 20–100A, with the battery's 20V cut-off respected. The terminals are M8 bolts (8mm bolt / 12mm nut), so fit battery lugs that match an M8 stud and size the cables for up to 100A continuous at 25.6V — thicker short cables keep voltage loss low. Because this is a 24V pack, pair it with a 24V-rated inverter, not a 12V unit.

No. The charge window is 0°C to 55°C — do not charge below 0°C, because charging a LiFePO4 cell when it is cold can cause lithium plating and damage. It will still discharge down to −20°C. Unlike some rivals with a self-heating element or low-temperature charge cut-off, this pack has no heater and no app, so mount it where the space stays above freezing in winter.

The product-specific diagrams we use as the headline give 520×250×320mm over the terminals and 21.15kg net. Other documents list slightly different case and box figures, most likely the bare ABS case versus the packaged / shipping dimensions rather than a second product. These alternate numbers are collected in the specification note on this page, and you should confirm the true case and box dimensions with the merchant before designing a battery bay.

The 400A figure is a one-second pulse for startup inrush, not a continuous rating; one excluded marketing graphic labels a higher one-second peak, which we have not used — confirm the true peak with the merchant. The pack is priced at €279.99 struck from €420.00, in stock and new, with a 3-year warranty against a ~10-year design life. Shipping is free to 15 European countries (1–3 days handling plus 2–7 days transit), with 30-day returns by post.