The engineering cells are 314Ah / 4019.2Wh (12.8V × 314Ah). The "300Ah" tier name × 12.8V = ~3840Wh, the figure printed on marketing and runtime graphics. Both describe the same pack. Spec tables on this page use the conservative manual 314Ah / 4019.2Wh and the 3840Wh nameplate for run-time; we never conflate this 4kWh pack with the smaller 100Ah sibling.

The conservative manual ceiling is 1280W continuous (12.8V × 100A charge and discharge), with a 400A one-second pulse for startup inrush. Plan every steady load at or below 1280W. GSIKE's marketing graphics for this pack show a higher BMS rating and a larger appliance; treat 1280W as your planning number and confirm the true BMS rating with the merchant before wiring anything above it (see the specification note). Parallel batteries add current — a single 300Ah does not raise the 1280W ceiling.

Roughly, on the same 12V bus. One GSIKE 300Ah delivers ~3818–4019 usable Wh at ~95–100% depth of discharge, whereas a 12V 100Ah flooded lead-acid gives only ~504 usable Wh at ~42% DoD. So one GSIKE replaces about six 12V 100Ah lead-acid batteries wired IN PARALLEL on the 12V bus. Never wire them in series to make 24V — that is a different system.

Because energy (Wh) and power (W) are two different things. This 12V GSIKE family uses the same 100A BMS whether the pack holds 100Ah or 314Ah, so at 12.8V the continuous ceiling is 100A × 12.8V = 1280W on every single unit. The extra cells only lengthen run-time (4019.2Wh vs ~1.28kWh) — they do not raise the one-pack power ceiling. To pull more watts continuously, wire matched units in parallel (current adds while the voltage stays 12.8V) or build a higher-voltage series bank; until then, never plan a steady load above 1280W on a single 300Ah.

At the 3840Wh nameplate divided by the load: 100W → 38.4h, 300W → 12.8h, 500W → 7.68h, 800W → 4.8h and 1000W → 3.84h. Keep every continuous load at or below the 1280W ceiling; at the full ceiling the bank lasts ~3.0–3.14h. When running through a separate 12V inverter, derate by about 90–95% efficiency and leave depth-of-discharge headroom.

The maximum configuration is 4P4S: four in parallel times four in series = 16 units, giving 51.2V and 1256Ah for 64.3kWh. When building a bank, use units that are identical in model and matched within about one month of production / charge history; do not mix new and heavily-used units, and keep the whole bank on the 14.4V charge profile with the 10V cut-off.

Both, for different jobs. The inside cells are engineering-rated 314Ah (12.8V × 314Ah = 4019.2Wh); GSIKE sells this in the conservative "300Ah" tier, whose nameplate is 12.8V × 300Ah ≈ 3840Wh — the figure on the marketing and runtime graphics. Use 314Ah / 4019.2Wh for spec comparisons and the 3840Wh nameplate to estimate run-time. The ~180Wh gap is tier rounding, not a second battery, and it does not change the 100A BMS, the 1280W ceiling or the 6000-cycle rating.

It weighs 26kg net (27kg gross) — genuinely heavy, so plan a two-person lift and use the integrated handles when tilting it into a motorhome locker or boat compartment. Bolt it down through the base with the M8 terminals using the supplied hardware, keep it upright, leave ventilation around the ABS case and run the thick 12V cables short. Because the charge window is 0°C to 50°C, mount it where the space stays above freezing in winter; do not charge below 0°C even though discharge works down to −20°C.

Not for a golf cart — this is a 12V leisure / deep-cycle pack, not a traction battery for the high continuous drive current of a golf-cart system. It is well suited to an electric trolling motor on a boat (several buyers report a full day on one charge), as well as campervans, motorhomes, off-grid cabins, home solar storage and camping.

The pack weighs 26kg net (27kg gross) — plan a two-person lift. The price is €369.99 EUR, in stock and new. Shipping is free to 15 European countries (1–3 days handling plus 2–7 days transit), with 30-day returns by post. The warranty is 3 years against a ~10-year design life, so the covered period is shorter than the expected service life at light use.