Quote:
Originally Posted by m37charlie
It's really best to use identical batteries in parallel, because if you mix types then as soon as some power is drawn from the two different batteries, they won't be identical voltage and one will discharge into the other. You can use somewhat different batteries in series, i.e. in constructing a 24V system.
You will have difficulty finding deep cycle batteries in Angola, but it will be easier in Namibia and RSA.
Charlie
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True Charlie but that's only really an issue if you use batteries of really different capacities e.g a 70 A/hr and a 170A/hr. I have used a decent 170 Varta and a 110 slightly dodgy Moroccan battery for 2 years now without problem.
Blimey Steve that's one hell of a sound system! Are you broadcasting to Africa? Seriously, I haven't done the calculations but your set up is much like mine so you shouldn't have a problem but that amplifier is going to use a massive amount of energy. I don't know if 400W is the consumption-it surely can't be but if it is-at 12V DC that would draw over 33 amps and really flatten any battery in next to no time. Over 3 hours (if 400W is the consumption) it would use 1200 watts whereas your fridge drawing 2.5 amps and on 12 hours out of 24 would only use 30Watts in a whole day. Can I suggest you try a day or 2 without the sounds (man!) and see what happens.
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