Celsus Split Charge Relay – 100A (RL100)

Description

Genuine Celsus · Part no. RL100

A Celsus 100A split charge relay for campervans, motorhomes and vans with a second, leisure battery. It links the leisure battery to the starter battery while the vehicle is running, so the alternator charges both, then separates them when you stop so fridges and lights can't flatten the battery that starts the engine.

Good to know

• Will it suit a newer vehicle? Many newer stop-start vehicles have smart alternators that drop their voltage once the starter battery is full, so a plain relay may leave the leisure battery undercharged; a DC to DC charger suits those.
• What cable and fuses do I need? Cable rated for the current you expect to carry, with a fuse at each battery end mounted close to the battery, so a chafed cable can't become a short to the body.
• Do I still need a mains charger? On a long stay without driving, yes: the relay only charges while the engine runs, so a hook-up or solar charger keeps the leisure battery up when parked.

Which one?

For clean power to audio or cameras on the same build, the Celsus Noise Filter – 5A (NF100) filters the feed.

Key features

• 100A split charge relay
• Charges a leisure battery while driving
• Separates batteries when parked
• For campers and vans

Specification