Long runtime

AST-3840

3.84 kWh with a built-in inverter module and UPS switchover — for boats, cabins and installations that must keep running when the shore power drops.

Battery capacity	3,840 Wh (LiFePO4, 51.2 V × 75 Ah)
Cell configuration	16 cells in series with integrated BMS
AC output	Pure sine wave, built-in inverter module
Solar charging	MPPT solar input
UPS switchover	10 ms
Monitoring	BMS data over CAN, app monitoring
Parallel operation	Up to 6 units in one system — single-phase or three-phase
Three-phase output	3 units minimum, one per phase (L1 / L2 / L3), 120° apart
Certification	EMC tested · RoHS · UN38.3 transport tested

Built for continuous duty.

Deep capacity and a UPS path means loads never notice the switch.

⚓

At anchor

Overnight house loads — fridge, lights, electronics — without running the engine.

🏠

Off-grid cabin

Days of autonomy when paired with solar input.

🛡️

UPS duty

10 ms switchover protects equipment during outages.

🔌

Expandable

Pairs with additional capacity for longer runtime.

Three units, three phases.

Link three AST-3840 units and the set delivers a three-phase supply — one unit per phase, 120° apart — for motors, pumps and workshop equipment that will not run on single phase.

▲

Three-phase output

One unit per phase (L1 / L2 / L3), each phase 120° apart. Up to six units can be paralleled in total.

🔗

Plug and link

Units are daisy-chained over the parallel port with the supplied cable; the master unit is elected automatically.

⚡

Single phase too

The same port parallels units for more single-phase capacity when three-phase is not needed.

🏭

Loads that need it

Three-phase pumps, compressors and machine tools — in a boatyard, on site or in an off-grid workshop.

Cabling, phase sequence and battery sharing are confirmed in the installation manual for each set.

Inside the AST-3840.

Cell layout, protection board, fusing and thermal path — shown on the real unit, not a render.

Internal structure

Slot 03 · link pending