I'm trying to wrap my head around the maximum 60V input limit for microinverters, especially those that can handle 2 or 4 panels. Most of the 400W solar panels I see have a voltage around 37V. Can you connect panels that exceed the 60V limit, and will the microinverter just clip the voltage down to 60V, or do I absolutely need to find panels with a Voc below 60V? I've heard that with DC string inverters, you can't exceed the Voc plus a buffer for colder temperatures. For context, I'm setting up a 23kW system using flex boss 21 and grid boss, and I want to maximize my inverter capacity. I also have extra space on my roof and I'm considering some AC grid tie options using one of the smart ports from the grid boss. I'm aiming for the lowest cost per watt, especially since I have plenty of solar from my main system. Additionally, my roof is facing 30 degrees N/NE, so I expect lower production capacity. Currently, I'm exploring microinverters like the Aptos MAC 800 or Hoymiles 1200NT for better cost efficiency.
1 Answer
Microinverters are typically designed for per-panel installations, meaning they handle one panel per input. From what I've seen, they don’t really clip the voltage; if your panels exceed the maximum input, it could lead to wasted potential rather than just limiting the output.
So, if I connect 4-400W panels each with a 37V Voc to a Hoymiles microinverter that supports 4 panels, would that work without any issues?