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MPPT is definitely the way to go. We have been off grid for over 6 years now. Our entire farm is (and has been since the start) solar powered. I used to heat our water with solar thermal in the summer and our wood stove in the winter, but last year when I was winterizing the solar thermal set...

Hello again, I searched through the forum and could not find any info on high voltage DC switches (100V to 400V). If anyone could help or maybe point me in the right direction I would appreciate it. I am currently looking for switches or relays to handle between 100V and 200VDC, but maybe...

Hello, I am new here and looking for some information / advice on heating water (and air) from PV panels. I believe that I searched and looked through all the threads and could not find the information I was looking for so that is why I am posting a new thread. I have a few tanks / elements...

Yes, thank you. I too have found a couple like that, and some DC breakers which could be used as switches too. I was just hoping someone might know of more options, especially with relays, and maybe some less expensive options...

As inexpensive as possible. $20 isn’t too bad, but $50 and up is just too much. That site you shared actually has a few in the $20 to $30 range that aren’t too bad. Up to 800VDC, 16A, 2 pole for $26. I searched quite a bit and was unable to find anything like that. I think because I searched for...

Well, yet again I found everything. I have searched for this stuff for months and found nothing.now I take a few minutes and more than enough information is popping up. I just found high voltage DC relays for under $10 each on eBay.

https://www.ebay.com/itm/362974095475 This is one of many. At least I found manufactures, part numbers, etc...

Update: It is definitely all about resistance just like David Poz said. Even though I watched that video (from David Poz) before my post, I didn’t quite understand exactly how (I blame it on my head cold). With some more searching and digging, I did come across a few articles that were quite...