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I just added it this year with my oldest batteries being from 2004. I lost one from 2004 and one from 2005 I think. Possibly a bit of EDTA added earlier may have prevented that loss. The two had shorted cells and I haven't recovered them - but I just pulled them out of the lineup, and haven't tried to do any more serious work with them. I left the EDTA in them once I added some. I put a couple tablespoons in a gallon of water and just used it to replace water as the batteries needed it. I went back to normal rainwater or distilled water after that except if a cell still showed signs of low specific gravity then it got another dose of EDTA water added. I monitor battery condition with the hydrometer and that is when I found that the EDTA had improved the batteries. I had never seen the specific gravity that high consistently before the EDTA.
Tickhill, the way to keep your warranty intact is to order an extra cable and cut it in half using one end for the connection at the end of your string and same for each set of panels you must parallel.I live in the boonies - such things are not available here - they didn't have them when I ordered my panels, so I take my chances and chop off the ends hoping the company has enough faith in their panels that it likely will not fail.Likely you will have to void the warranty on at least one panel if you take the cut off end and put it on the other panel (cut off the female - plug it onto the male at the opposite end of the string or opposite way) for a connector....why didn't I think of that earlier..... Combiner box I guess is ideal and probably required for code, but I use wire nuts most of the time. Seems any box with a cover should meet code. I haven't checked it out.Free Code suggested practices.http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/PVnecSugPract.html
Cool. I have been having a bit of a communication slow down with Phoenix. Maybe Miami is better - I emailed Miami today. Parts have arrived on time once I got the last order in, but getting it ordered if you have a question seems to be a bit slow.
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