Description

Finally! We have what you have been searching for all these years…. Sick of killing your starter battery every time you dont use the van over winter or when it is left for a few weeks? Unlike lead acid batteries you can run these ones flat!

New and updated to feature better winter protection in sub zero conditions this new lithium.starter battery fits under the seat and in the battery box of your VW T25/T3/Vanagon. We are even offing this product with free UK shipping.. For customers outside of the UK please contact us to see if shipping is possible before trying to order as shipping batteries internationally is not always possible.

ALTERNATOR-FRIENDLY BMS

BUILT TO LIVE BEHIND AN ALTERNATOR.

Most lithium starter packs use a BMS firmware tuned for off-grid leisure use. Drop one into a vehicle and the protection thresholds trip during normal alternator operation – and your dashboard lights up with charging-system faults.

This battery
15V / 3.75V
Pack / cell over-voltage trip
TYPICAL LITHIUM STARTER
14.6V / 3.65V
Same threshold most off-grid packs use

Tighter thresholds cause false trips during normal alternator operation. Ours don’t.

  • 14.2-14.6V
    Recommended charge window. Squarely inside every regulated alternator’s output range. The BMS sees a normal charging system and accepts charge normally.
  • 15V / 3.75V
    Hard trip only at fault. Set deliberately high so the BMS doesn’t interrupt normal charging – a regulated alternator should never reach this in working order.
  • 14.0V
    Automatic reconnect. No manual reset, no latched contactor. The BMS waits for voltage to normalise and resumes charging.
  • SPLIT MOSFETS
    No load-dump at the alternator. Charge and discharge are independently switched – even when the BMS does protect, the discharge path stays closed and the bus keeps power.

 

Fitment note: If your van has a metal lid on the battery box this needs to be removed as a condition of sale. When fitting to a van with no swivel base fitted the factory mounting bracket can still be used. When fitting to vans with the Westfalia factory swivel base you need to use our fitting bracket for that seen in the related items.