The Breakroom > The Water Cooler
Low voltage DC solar heating pump from europe?
hanermo:
Em..
the dc direct voltages get high.
We just installed our latest 10 kW system, 3-phase, and the open circuit voltage is rated at 1000 V.
With isolation relays and all paperwork and certs.
The more serials you get in a string, the higher the voltage can go.
And it varies a lot, during the day.
20 panels in 2 strings with a huawei 3-phase mppt inverter.
Connecting the pump behind the inverter is likely to be much more durable, and easy, and cheap.
Things like 220V well pumps are meant for "harsh service" aka industrial use, and are really cheap.
Optionally 220V airco circulation pumps, or shower booster pumps.
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