The seller by mistake had sent me the NPT version while I had ordered the BSP version but he was very kind to just send me another one for free. So due to his impeccable service I would recommend him to anyone.
For my 15 L under sink kitchen solar hot water tank. I put two of the elements of this unit in series (~250W @ ~39-40V) and left the third one disconnected. It heats up pretty fast with just that, and only draws 6.5 amps from the 36VDC system. Nice to have all those power options in one unit! TurquoiseEnergy.com [menu => monthly newsletters]