Second battery installation kit for all 1980-83 air-cooled Westfalias (NOT diesel) and all 1980-91 NON-camper (MultiVan, Weekender, Carat & 7 Passenger w/o sink, stove, fridge system) Vanagons. Includes wiring, relay, fuses, battery hold-down clamp and instructions. This easy to install kit is designed to charge a second battery (located under the drivers' seat) while the engine is running and isolate it when the ignition is off. You can then safely run your stereo, a power inverter, interior lighting or any other electrical device you choose to power from the auxiliary battery without depleting the charge of your primary starting battery.
*80-83 Westy Owners: This kit will not power your refrigerator off the auxiliary battery, as there is no simple way to do so. This kit merely allows a 2nd battery to be installed, charged and isolated from the main battery when the ignition is off. It is up to you to wire all accessories to it.
If you do not have a fridge relay under the driver's seat this is the kit for you. If you have the relay, you want to buy the AUX-700
Designed for use with the SLA 1161 battery sold separately below.
We recommend reading our article, "Batteries: How to Keep 'em Happy
If you've got an 1983-91 full camper Vanagon, please order this kit
Note: This kit is intended for Vanagons with Waterboxer engines, but can be used with conversions. However, our instructions do not cover installation on converted vans, so you'll need to be extra careful with the wiring.