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I have a solar water heating panel which developed a leak when it froze. The leak is small and at a solder joint. I can solder it but it will be difficult. Has anyone one had good results with a epoxy or other coating. The water pressure is about 75 lbs. Any information will be appreciated.

I have two sets of panels one east one west. Is there a advantage in using two SCC so that lesser producing panels don't affect the other set?

Looking at the epever solar charge controllers some have the negative lead grounded. What is the reason for this and why does it seem to apply only to the smaller units.

Re the welded studs 1-Are all of the studs aluminum ? 2-In a photo showing both the 6mm studs and the 8 mm studs it appeared that the plate for the 8 mm stud was larger then the plate for the 6 mm size. If that is the case it would seem that choosing a cell with a large pad on the cell and a 8...

I cannot locate the information by Ghostwriter66 re how to buy from China. Could someone point me to it?

How are the panels attached to the unistrut ? I had planned to make up a fitting using a short piece of 90 angle but there may be other methods.

Does someone have the contact information for ian roux. Phone and or email?

I am planning for two arrays one facing east and one west the size of all in one has one mpp input. What would be the best way to handle this?

What is the advantage of 1/2 size cells ? A panel of 72 std cells compared to 144 one half size cells.

Are there any ham operators that can tell about their experience with rfi from the all in one type inverters. I had the idea that the Growatt brand was much cleaner but I don't know if that is true.

I wish to install 8 280 ah LiFePO4 cells with the idea of adding 8 more in maybe a year. I would use the same scc and they would all feed the same inverter. Is there any configuration which would be either better or worse than making up a second 8 in series and installing it in parallel with...

I plan to order 12 of the 280 ah cells. Is there a minimum size that can go by ship ?

Are there any SCC that use current flow to terminate the charge ?

It would be a help if there was a sample of how to specify a product. In the case of asking for a cost from a seller in China what items to consider and how to describe them. What you are buying , how it will be paid for, how it will be shipped etc. For a beginner I don't know what I don't know.

I need to provide 12 amps at 120 v to charge a car. If I start with 2000 watts worth of panels should I expect approx. 20% loss with new cells and panels and maybe 30 % loss with used panels and cells. Does the 20% loss figure sound about right?