I have always wondered about the thermal math on a new-fangled heat-pump water heater in a utility room. They basically air-condition the room to heat water, and the hotter the room, the more efficiently they work. They do use up some watt-hours for the compressor, not a good choice in a small off-grid system, but with grid-tie / battery backup maybe so and extend battery life too? Anyone tried this?
Dan Fink Buckville Energy IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer NABCEP / IREC / ISPQ Accredited Continuing Education Providers™ 970.672.4342 On Mon, May 25, 2015 at 12:05 PM, Darren Anderson <dar...@self.org> wrote: > I’d also be interested to know if anyone is doing active or passive > cooling for battery banks and what solutions they have come up with. We > have been exploring various options including solar direct drive cooling, > DC aircon units, and high efficiency AC aircon units. > > As far as I know there are no solar direct drive solutions that are > commercially available or affordable. There are options in DC-powered units > - used frequently in the Telecom industry. But the easiest solution, > especially for AC coupled systems, could be high efficiency AC units that > could be made to operate with photocell control for daytime operation only. > One could just cool an insulated battery box, or better yet, the entire > control room since heat is also the enemy of electronics and it might > extend the life of inverters and charge controllers as well. > _________________________ > Darren Anderson | Project Manager > Solar Electric Light Fund | www.SELF.org > >
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