krell313
New Member
Hi all, I may have a problem with my setup. What I have is an 800 a/hr 24 volt fla battery with a FLEXmax 80 charge controller and 6 370 watt (REC N-peak 2 black series) panels totaling 2220 watts (STC) solar input. I have read about over-paneling and I was wondering if I need to take some precautions.
This installation is in northern California and can possibly see low temps in the mid 20’s but this is rare. The panels are set as 2s3p to keep the voc relatively low, 90 voc at 20 degrees. During the warmer months there is no problem as the cells warm and have a lower output.
My concern is that a cold winter day comes along with an edge-of-cloud effect. I fear that the elevated wattage from the panels may cause harm to the FM80 as I have heard.
I can engineer something that will put a 250 watt load on the panel side of the FM80 if the output current goes above, say 80 amps. The load on the panels would take away some of the available power to the FM80 and reduce the output current faster then the FM80 could current limit. This would be a challenging workaround but I think it would keep the FM80 happy. Do you think it is worth my time to do this with my setup?
This installation is in northern California and can possibly see low temps in the mid 20’s but this is rare. The panels are set as 2s3p to keep the voc relatively low, 90 voc at 20 degrees. During the warmer months there is no problem as the cells warm and have a lower output.
My concern is that a cold winter day comes along with an edge-of-cloud effect. I fear that the elevated wattage from the panels may cause harm to the FM80 as I have heard.
I can engineer something that will put a 250 watt load on the panel side of the FM80 if the output current goes above, say 80 amps. The load on the panels would take away some of the available power to the FM80 and reduce the output current faster then the FM80 could current limit. This would be a challenging workaround but I think it would keep the FM80 happy. Do you think it is worth my time to do this with my setup?