Hi, I have a Victron Smartsolar 150/35 and I have two 485w solar panels wired in series. I'm considering upgrading my solar system with one extra solar panel that fit's the amperage of the other panels and I want to wire it in series with the residual two panels. The VOC would be 129v. It seems somewhat close to the limits of my MPPT considering it can get to -8° C or 17°F in my area.
What I don't understand fully is this- The voltage of the panels rises only when there is sunshine, so there would have to be -8°C/17°F during the top sunshine hours to create voltage too close to 150v limit of my MPPT. And that is impossible in my area. -8°C/°17°F is the record night time temperature during the winter months. So if my assumption is correct, there is no danger in having 129v panel array with 150v MPPT in my case, is it?
I'd be grateful for any advice
Jan
What I don't understand fully is this- The voltage of the panels rises only when there is sunshine, so there would have to be -8°C/17°F during the top sunshine hours to create voltage too close to 150v limit of my MPPT. And that is impossible in my area. -8°C/°17°F is the record night time temperature during the winter months. So if my assumption is correct, there is no danger in having 129v panel array with 150v MPPT in my case, is it?
I'd be grateful for any advice
Jan