Re: [RE-wrenches] Old Solar Modules

2022-09-12 Thread Allan Sindelar via RE-wrenches
The Photowatt is French. Early 80s most likely. Windy Dankoff imported them for a few years, late 70s - early 80s. They’re remarkable modules. I had (before I retired) several clients still using them. Every one is still putting out at or close to rated output, 40 years later. The only problem

Re: [RE-wrenches] Old Solar Modules

2022-09-12 Thread Christopher Warfel via RE-wrenches
If you can't find anything, I would think measuring Voc, adjusting for temperature,  and then dividing into the wattage would give you some reasonable approximations. Chris On 9/12/2022 10:28 AM, Amos Post via RE-wrenches wrote: Hi all, I have a few old modules I am trying to date best I

[RE-wrenches] Old Solar Modules

2022-09-12 Thread Amos Post via RE-wrenches
Hi all, I have a few old modules I am trying to date best I can. One is an Photowatt (Arco?) 55Watt silver frame yellow backsheet, one is a Solarex 53Watt silver frame grey back sheet, and one Arco 50Watt black frame black back sheet. Looking for help with dates and if anyone knows of good