Solar Inverter Interference

[VK3AV]

I have solar boosted electric hot water at my location.  There is a controller unit that monitors - the hot water service tank water temp and the water temp in the roof mounted panel and activates a small pump to circulate the water from the roof to the tank and back when and as needed.

So during winter here (its cold) the circulation pump would seldom cut in as the water temp on the roof may only a few degrees C so low to circulate. On sunny days the roof temp can be 60+ degrees so the circulation pump cuts in. All of this is programmable.

So, that means that both the controller and the pump might be noise sources. I cant say that I have noticed it, but I have not looked for it either. 

I do have multiple neighbours with solar systems (I need to do that too as my bills are huge) and there are also some electric fence units in operation in this area. Of note that during power outages for line work or due to unplanned outages caused by tree damage to lines (both happen a lot here with a hundred+ houses off line), with the HF radio on a battery my noise levels are S1 or less and at other times S5+ dependant upon the band +/- electric fence pulses.

Regards
Bernard