Ok I know this has been talked about to death.... But here goes..
The problem, My friend has a nice RE system 2kW solar 1.5kw turbine and fresh new battery's 1100Ah and 2000 Watt trace inverter, all equipment in a nice outbuilding about 50 feet from his house. The A/C line from there to his house, much cheaper and safer for insurance. Also in the outbuilding is two c-60's for dump load control, one was not enough!(I wish) Most day's by noon he is dumping lots of power. What he would like to do is use that power for domestic water heating.
Solution?
1 - Using both c-60's he would need 200 feet or more of very expensive big wire and two custom 24V water heating elements 140$? ea. I don't think this would work RF noise, inductance, line loss would be horrific!
2 - Then there is putting the hot water tank in the outbuilding and burring the water lines.. I think this would waste a lot of water. In my house 15 feet from hot water tank to my bathroom takes a bit of time to get hot. I can't imagine 50-60 feet.. Then there is the freezing thing in the winter.
I have been playing around with some ideas, A/C relay on inverter output, but as talked about in other posts is not a viable solution, due to poor output transformer loading. Also talked about is how the batteries like PWM vs. bang-bang type control, so I would like to remain on this path.
So what to do? Has or does anyone here do this? How? I'm sure if such a solution existed a lot of people like my self, only on a much smaller scale would like to see it.