dermotmcdonnell wrote:

I want to use a DC Water Heating Element as a Dump Load for a 48v/30amp
small wind turbine and/or photovoltaic set-up. Say I´m looking at an
absolute maximum power output of 1.4kW. I would like the power to go
straight from the renewable system to an immersion hot water tank DC
water heating element. This would save a lot of expensive electronics
and it should also minimise power losses. There are some very good,
cheap, small wind turbines in this power range available. I want to
install this for my mother and she lives in a very windy area in the
West of Ireland so the pay back time should be short.

have you calculated payback time?

DC heater element casings last the same as ac, and casing failure is
common cause of end of life. The element itself will be more robust
than mains ones.


NT