0A18010SRV 12 V Engine Battery Charger Assembly for Generac Generator 4390-0

12 V Engine Battery Charger Assembly for Generac Generator 4390-0

The 12 V Engine Battery Charger Assembly for Generac Generator 4390-0 replaces the OEM 0A18010SRV charger to keep a generator starting battery topped off and ready.

Overview

This 12 V engine battery charger assembly is a direct-fit replacement for the OEM 0A18010SRV unit used on Generac generator 4390-0 models. The 12 V engine battery charger assembly maintains a steady trickle charge so the starting battery stays strong between runs and is ready when utility power drops. It is built for owners servicing their own standby or portable generator.

Built For Performance

• 12 V output matched to the OEM charging circuit
• Direct replacement for OEM 0A18010SRV
• Battery charger assembly design for straightforward swap
• Keeps the starting battery charged during standby
• Compact housing for tight engine compartment fit

Fits These Machines

• for Generac generator 4390-0

On-The-Job Use

• Standby generator battery maintenance
• Home backup power systems
• Seasonal generator storage prep
• Fleet generator servicing

Specs At A Glance

Good To Know

Q: Will this charger assembly work on any 12 V battery? A: It is designed for the 12 V starting battery circuit on the listed generator model and should be matched to that application. Confirm your existing charger part number before ordering.

Q: Do I need to disconnect the battery during installation? A: Yes, disconnect the battery and shut off the generator before swapping the charger assembly. Reconnect once the new unit is fully seated and wired.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.