.... I wanted to charge the camper battery, possible one, on the road.
A few thoughts on this:
- Since your first post mentioned "deep cycle
batteries", and your post quoted above mentions "possible one
", it might be helpful to mention that often times deep cycle
batteries are 6-volt. While there are 12-volt deep cycle batteries, the 6-volt are more plentiful (e.g. golf cart batteries). To be compatible with the car's 12 volt system, the 6-volt batteries are set up in pairs
wired in series to produce 12 volts.
- The battery pin in the KL's 7-pin connector is at 11 o'clock and the ground pin is at 4 o'clock. The owner's manual diagram is misleading. But no problem because the schematic for the pins is stamped right on the connector's cover. The nice thing is the battery pin is switched; meaning it is live only when the ignition is on. Don't have to worry about the camper battery being drawn down into the vehicle's battery when the ignition is turned off. (FWIW, the 4-pin connectors do not include a 12V battery pin by standard.)
- The other nice thing about the battery pin for charging your camper batteries is the car's alternator and voltage regulation system ensures your camper batteries are getting an appropriate charge and not being overcharged.
- Choose the correct gauge wire when running a cable from the car's connector to the battery bank. For example, if the wire run is 7 feet long an appropriate gauge for carrying 30 amps is 14 AWG - http://www.offroaders.com/technical/...gauge-to-amps/
- While the KL's end is fused, it would be a good idea to have a 30 amp fuse at the camper's battery bank too (cheap insurance).