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Decided to go solar (just a little)
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<blockquote data-quote="Terryl" data-source="post: 1131984" data-attributes="member: 369937"><p>It's not the heating elements that would be the problem, it's the thermostat that controls the elements, on a AC powered water heater the thermostat's contacts are rated for 220 volts AC, I don't see anything for a DC rating on most electric water heaters, using DC would melt the contacts eventually if used for switching 25 amps at 200 volts DC. </p><p></p><p>The contacts would be switching at a full load on the DC circuit, were as the contacts on a AC powered one would switch at a zero crossing. (AC in you part of the world switches back and forth at 50 times a second)</p><p></p><p>I did some looking around and found DC powered water heaters.</p><p></p><p>How far is it from the panels to the heater location?</p></blockquote><p></p>
[QUOTE="Terryl, post: 1131984, member: 369937"] It's not the heating elements that would be the problem, it's the thermostat that controls the elements, on a AC powered water heater the thermostat's contacts are rated for 220 volts AC, I don't see anything for a DC rating on most electric water heaters, using DC would melt the contacts eventually if used for switching 25 amps at 200 volts DC. The contacts would be switching at a full load on the DC circuit, were as the contacts on a AC powered one would switch at a zero crossing. (AC in you part of the world switches back and forth at 50 times a second) I did some looking around and found DC powered water heaters. How far is it from the panels to the heater location? [/QUOTE]
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Decided to go solar (just a little)
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