Was looking for some used panels for my RV and found some used Trina 250w panels on FB marketplace for a good price. They are 10 years old so I want to make sure they are still producing before I purchase them. I was going to bring my multimeter along and test them but its going to be cloudy the next week. Obviously the output will be lower but is there a certain range/percentage of output where I can safely say the panels are still performing as they should? Any advice appreciated. Thanks!
link to the model: https://www.solarelectricsupply.com/trinasolar-tsm-250pa05-solar-panels
Specs:
link to the model: https://www.solarelectricsupply.com/trinasolar-tsm-250pa05-solar-panels
Specs:
Peak Power Watts-PMaX(Wp) | 250 |
PTC Rating | 227.5 |
Power Output Tolerance-PMaX(%) | 0/+3 |
Maximum Power Voltage-VMP(V) | 30.3 |
Maximum Power Current-iMPP(a) | 8.27 |
Open Circuit Voltage-VOC(V) | 37.6 |
Short Circuit Current-iSC(a) | 8.85 |
Module Efficiency ηm (%) | 15.3 |