Sorry me being unclear again. Things went dim, I tested various things, when flushed toilet things went very dim during, but brightened to normal after. I've since had a theory. Battery giving out nothing (for some reason given its not that old, around 2 years, not heavy use, and the little indicator thing they have built in is green) but it seems everything is running off the charger. So when drain is under the chargers output, all is well, but as soon as it goes over that, all hell breaks loose. Going to try a known good car battery I've got spare when I get chance
In fact pretty damn sure now. Disconnected charger and turned it off, put a light on and got next to nothing. How strange for a battery to just conk out. Been perfect last 2 weeks
Mixture of an aging battery and a charger that cannot supply enough to keep up when the battery is lacking.
Also a car charger will charge the battery beyond the gassing point so over time the water in the battery will get boiled away and needs to be topped up.
Quote: Originally posted by firemoth on 15/2/2015
If it makes a difference the heaters aren't on full pelt. The 2000w is on half, the 1500w is on 2/3. Got 2 because big caravan, one only heated one half. Other end was freezing
Doesn't make any difference. All the thermostat does on each heater is switch off the heater once it is warm enough. If both heaters are actually heating up, then they will draw 3500w.... or about 15 amps.
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Topic: iffy 12v system
