I have a mttp charge controller that tends to get stuck at 62 volts if it is on when the sun start to come up. I was contemplating using a combination of something like this
And this https://www.amazon.com/gp/aw/d/B09HRX922Z
Does anyone have experience with solid state relays on a PV application? What is the expected longevity of this type of relay? I have 9 240 watt panels 3s3p unloaded in the sun they max out close to 120 volts. The typical scenario that I would be switching would be between 3 and 8 amps at 62 volts. The max amperage I could see at the relay is 24 amps but since my array is mounted more or less flat on my rv roof I doubt I will ever see that number. So far this year the best I have seen in full sun is just over 1800 watts. The typical full load voltage is around 90 volts. I don’t intend to use this as a disconnect just a method of releasing and reconnecting the solar in the morning without used a great deal of space near my charge controller. If I need to service it I will physically disconnect the mc4 connectors at the controller rather than trust a relay. My main limitation is space. A solid state relay uses almost no power and very little space the timer can be mounted a distance away from the relay and is much less of a concern. I’m willing to be the Guinea pig on this experiment but would like to learn from other’s mistakes and successes and not reinvent the wheel if someone else already has experience or knowledge.
And this https://www.amazon.com/gp/aw/d/B09HRX922Z
Does anyone have experience with solid state relays on a PV application? What is the expected longevity of this type of relay? I have 9 240 watt panels 3s3p unloaded in the sun they max out close to 120 volts. The typical scenario that I would be switching would be between 3 and 8 amps at 62 volts. The max amperage I could see at the relay is 24 amps but since my array is mounted more or less flat on my rv roof I doubt I will ever see that number. So far this year the best I have seen in full sun is just over 1800 watts. The typical full load voltage is around 90 volts. I don’t intend to use this as a disconnect just a method of releasing and reconnecting the solar in the morning without used a great deal of space near my charge controller. If I need to service it I will physically disconnect the mc4 connectors at the controller rather than trust a relay. My main limitation is space. A solid state relay uses almost no power and very little space the timer can be mounted a distance away from the relay and is much less of a concern. I’m willing to be the Guinea pig on this experiment but would like to learn from other’s mistakes and successes and not reinvent the wheel if someone else already has experience or knowledge.