Hey everyone! I'm diving into another solar installation, this time going for a hybrid setup instead of microinverters like last time. I have a question regarding the AC output specs for the EG4 18kw inverter. I'm using a 17.5kw solar array and plan to leverage battery storage primarily for peak shaving. The batteries will charge overnight when energy is cheapest, so ideally, I want to export as much solar output back to the grid during the day when it's more valuable.
My main question is whether the EG4 18kw can actually send the full 18kw of solar energy to the grid, or is the maximum output limited to only 12kw? I also need to consider that my house will have a max load of 10kw, and during peak times, the batteries could contribute 4kwh for up to 4 hours (from a 20kwh pack).
Thanks for your insights! 😊
2 Answers
The EG4 18kw inverter's maximum power output is indeed around 12kw for AC to the grid. If you refer to the user manual under the "AC GRID OUTPUT DATA" section, it confirms this limit. So even if your solar generation exceeds 12kw, the inverter will cap the output to the grid at that level.
Just a heads up, if you’re looking at minimizing export issues, remember that while the FlexBoss 21 can handle up to 16kW with solar, it will still output only 12kW without additional setups. If you’re considering a hybrid configuration, I’d suggest researching whether the Grid Boss is necessary for your specific setup. It can be a bit tricky to navigate!