I currently (used to) have a 5kw Growatt solar system that is on-grid. Few months ago, our place (Guam, USA) was hit with a super typhoon that took all my solar panels to solar heaven. The naughty ones landed in my neighbor’s yard. See image.
The setup I had was, solar panels (5kw) —> Growatt inverter (no DC disconnect) —> disconnect box (required by utility company) —> 50A double pole breaker in my main panel box. Neutral and ground are connected to my main panel as well.
I’ve decided to completely upgrade my system and need some guidance in wire gauge and wire connections.
I purchased 18kw of panels and 2x Megarevo R10KNA, which I want to run 9kw per inverter. I want to be able to run everything in house should the power go out. Connecting panels to inverters I can do. It’s inverters to main panel box I need guidance with.
Questions I have are:
1. Can I connect both inverters together and run one set of wires to my main panel box and still maintain an on-grid setup? I’ve attached the diagram for the Megarevo inverter.
2. I plan on purchasing batteries in the near future. Would I have to rewire everything again for this setup or can simply connect batteries to inverters and change some settings on the inverter?
3. What wire gauge should I use from inverters to main panel and what breaker size should I use?
Ultimate goal is for panels to power my house, charge my batteries, and feed the grid should there be excess. If power goes out, batteries power my house, then grid power takes over as last resort.
The setup I had was, solar panels (5kw) —> Growatt inverter (no DC disconnect) —> disconnect box (required by utility company) —> 50A double pole breaker in my main panel box. Neutral and ground are connected to my main panel as well.
I’ve decided to completely upgrade my system and need some guidance in wire gauge and wire connections.
I purchased 18kw of panels and 2x Megarevo R10KNA, which I want to run 9kw per inverter. I want to be able to run everything in house should the power go out. Connecting panels to inverters I can do. It’s inverters to main panel box I need guidance with.
Questions I have are:
1. Can I connect both inverters together and run one set of wires to my main panel box and still maintain an on-grid setup? I’ve attached the diagram for the Megarevo inverter.
2. I plan on purchasing batteries in the near future. Would I have to rewire everything again for this setup or can simply connect batteries to inverters and change some settings on the inverter?
3. What wire gauge should I use from inverters to main panel and what breaker size should I use?
Ultimate goal is for panels to power my house, charge my batteries, and feed the grid should there be excess. If power goes out, batteries power my house, then grid power takes over as last resort.
