I have three MPPT 150/35s each managing a 330Watt panel. Even in full sunshine here in Spain I never get a combined output of more than 400W. Each device seems to randomly drop to very low output. I read on the blogs that there is a temperature issue with these controllers. This would be disastrous for me as I'm using them to charge my boat batteries and when offshore I need them to work. My question to Victron: Is there a temperature issue? If I upgrade the firmware to V1.56 does this address the reported issues. I'm happy to do any testing you want but surely there's an explicit answer. I don't want to spend a lot of time trying to make something work that should really be changed out. Please advise.
By the way these were installed less than two years ago and I have been away from the boat for over a year due to Covid restrictions, hence the delay.
