The Votronic StandBy Charger enables simultaneous trickle charging of your starter battery whilst your leisure / auxiliary battery is being charged from a mains charger, solar panel or generator. This is ideal if the charging source connected to your leisure battery has only one output, but you want to be able to provide a maintenance charge to your starter battery to keep it topped up.  Ideal for over-wintering campervans, motorhomes or boats.

Activation of the unit is automatic and it only operates when it senses a charging voltage at the leisure battery, keeping the batteries electrically separated otherwise. The amount of current diverted from the charging source will vary depending on the charging conditions but it is limited to 3A maximum. The starter battery cannot be over-charged because the charging voltage is reduced by 0.6V before reaching the starter battery.

Fitting is very easy and does not require any re-configuration of existing electrical systems. The unit simply needs small gauge cable and suitable fuses to be fitted between its terminals and the positive terminals of the two batteries. 

Suitable for use with lead-acid batteries only (not for use with lithium technology) where both batteries have a nominal system voltage of 12V.

Designed and manufactured in Germany with a 2 year manufacturer's warranty.

Further information

• Use 1.5 - 2.5mm² cable with 10A fuses
• Negative terminals of both batteries must be electrically connected (directly or indirectly)