I have 3 solar panels, each rated at 49.4 V open circuit voltage (more specs here) and a 40a MPPT SCC with a rated 150 V max input (here). However according to the specs, the MPPT is rated 138 V at standard testing conditions at 25 °C.
I want to wire all three panels in series so I can minimize the amount of wiring, fuses, and connectors I have to buy, but will this be too much voltage? I would have 3 x 49.4 V = 148.2 V going into the charge controller, which is below the 150 V rating but not 138 V rating at STC. Also, I've tested each of my solar panels to have an actual 45 V, so would this add up to 135 V and be okay?
If not, how would you arrange the panels?
I want to wire all three panels in series so I can minimize the amount of wiring, fuses, and connectors I have to buy, but will this be too much voltage? I would have 3 x 49.4 V = 148.2 V going into the charge controller, which is below the 150 V rating but not 138 V rating at STC. Also, I've tested each of my solar panels to have an actual 45 V, so would this add up to 135 V and be okay?
If not, how would you arrange the panels?