Fogstar Drift 12V 668Ah
668Ah of flagship lithium (8550Wh) on Grade A EVE cells, with built-in heating and Bluetooth: the top of the standard Drift range, backed by a 10-year warranty.
Characteristics
- Capacity: 668Ah, about 8550Wh (12.8V LiFePO4)
- Cells: Grade A EVE LF334, 300A Smart BMS
- Monitoring: Bluetooth (Fogstar Drift app)
- Safety: Automatic heating and fire suppression
- 668Ah flagship, heating and Bluetooth, 10-year warranty
Detailed overview: Fogstar Drift 668Ah Gen2 LiFePO4 battery
The Fogstar Drift 12V 668Ah Gen2 is the highest-capacity model in the standard Drift line, the UK's go-to name in lithium leisure batteries, already familiar to our readers through its 105Ah and 230Ah siblings. Sold as a limited-run edition, it targets installations that need a serious energy reserve in a single unit: large motorhomes, liveaboard boats, off-grid cabins or home solar storage.
It is built on Grade A cells from EVE (LF334 reference, 4S2P configuration), prized for their consistency, paired with a 300A smart BMS featuring a precision 0.2A shunt and active cell balancing. Its 668Ah capacity, or 8550Wh at 12.8V, is rated for up to 4000 charge and discharge cycles at 80% depth of discharge, for a service life spanning many years of occasional use.
Like the rest of the Drift range, it carries a built-in automatic heating function (triggered between 0 °C and 10 °C) that protects the cells during cold-weather charging, plus an internal fire suppression module, an extra layer of safety rarely seen at this price point. Monitoring runs through Bluetooth and the Fogstar Drift app, which displays voltage, current, temperature and state of charge from a smartphone. IP67 sealing and a reinforced ABS casing round out a battery built to last, at 56kg and 635 x 244 x 220mm.
Up to four batteries can be linked in series for 48V systems, or sixteen in parallel to multiply total capacity, a real advantage for building a scalable energy bank. For anyone already running a 230Ah Drift and needing more headroom, the 668Ah offers a straightforward single-unit upgrade path rather than wiring several smaller batteries in parallel. Its 10-year manufacturer warranty, designed and backed in the UK, speaks to Fogstar's confidence in its own cells. Its main limitation remains availability: the brand is sold almost exclusively in the UK, shipping directly from fogstar.co.uk.
Full specifications
Detailed characteristics (EAN: 5065021158531)
Battery
| Technology?Battery chemistry; LiFePO4 lasts far longer and can be fully discharged, gel/AGM is maintenance-free and cheaper. | LiFePO4 (lithium) |
|---|---|
| Nominal voltage?Battery voltage (12, 24 or 48 V). | 12 V |
| Capacity?Capacity in amp-hours; multiply by voltage to get energy in Wh. | 668 Ah |
| Energy?Stored energy in watt-hours. | 8550 Wh |
| Cycle life?Rated number of charge/discharge cycles, at the stated depth of discharge. | 4000 cycles (80 %) |
| Expandable up to?Maximum capacity reachable with add-on modules. | 136800 Wh |
Power and protection
| Max discharge current (BMS)?Maximum current the BMS allows on discharge. | 300 A |
|---|---|
| Built-in BMS?Battery management system protecting against overcharge, deep discharge, short-circuit and overcurrent (lithium batteries). | Yes |
| Low-temperature protection / heating?Cuts off or heats charging in cold weather to protect the lithium cells. | Yes |
Connectivity
| Bluetooth?Monitoring and settings via an app over Bluetooth. | Yes |
|---|---|
| Wi-Fi?Remote control and updates over Wi-Fi. | No |
Durability and format
| Ingress protection?Water and dust resistance (IP rating). | IP67 |
|---|---|
| Weight?Weight of the battery. | 56 kg |
| Dimensions (L × W × H)?Length × width × height, in millimetres. | 635 × 244 × 220 mm |
Availability and warranty
| Market launch?Date the model first became available on the European market. Useful to place its generation: technology moves fast in this segment, and a device several years old may be at the end of its commercial life. | March 2026 |
|---|---|
| Warranty?Length of the manufacturer's warranty. | 10 years |
User manual / Instructions for use (PDF)
Our tester's review: Julien De Jurquet
We already knew the Fogstar Drift in 105Ah and 230Ah; this 668Ah is a different beast entirely, a 56kg block that clearly isn't a one-person lift, so plan for a sack truck or an extra pair of hands during installation. Once in place, the Fogstar Drift app pairs over Bluetooth in seconds and shows precise data on cell condition, genuinely reassuring when monitoring a battery this large. The automatic heating did its job during an early-morning test at 4 °C, accepting charge without tripping a safety cut-out. The internal fire suppression module adds peace of mind on a pack this size. A couple of honest downsides: the four-figure price tag is one for a serious storage project, and as with the rest of the range, shipping comes from the UK with no fallback in mainland Europe. For anyone needing a genuinely large energy reserve in a single unit, it remains a serious contender.
Frequently asked questions: Fogstar Drift 668Ah Gen2 LiFePO4 battery
It serves as the main energy reserve in a large motorhome or van, a liveaboard boat, or an off-grid solar setup. Its 668Ah (8550Wh) covers substantial electrical needs in a single unit.
Yes. It has built-in automatic heating that warms the cells between 0 °C and 10 °C to allow safe charging, an essential safeguard on a battery of this capacity.
The 668Ah is the highest-capacity model in the standard Drift line, sold as a limited edition. It shares the same Grade A EVE cells, the same Bluetooth and the same built-in heating, with nearly three times the capacity of the 230Ah.
Yes, up to four in series for 48V systems, or sixteen in parallel to increase total capacity, allowing a scalable energy bank to be built over time.
Yes, it ships directly from Fogstar's own UK store, fogstar.co.uk, with a 10-year manufacturer warranty.
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Published on 04/09/2026