In article , snipped-for-privacy@harborside.com says... | A relay that will handle a 15amp load and close at about 13.0-13.4vdc and | open at, say, about 12.7vdc. Is such a device available - if so where? OR what | can I put together to operate in such a manner?? | | |
We have these in the UK, so I think they will also be available in the US.....
We use two types of relay for caravan towing purposes. The older style one is fed from the ignition warning light system, which means that the relay is only made when the ignition is on and the alternator is producing a charge sufficient to turn the ignition warning light off.
The second and more recent type, simply requires a feed from the battery alone. It senses the voltage across the battery and makes the relay when the voltage indicates the battery is being charged.
Both are used for supplying fridges and charging the battery in a caravan and are rated at 20amps or better.