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If I get it right, you suggest that he has the battery connected to both inverters. Set a very low (even 0%?) SOC limit to the on-grid inverter, so that all its surplus energy is directed to the grid. Then use the off-grid inverter (with its own separate solar modules) in zero feed-in mode, only...

Thanks for your valuable comments. We will try the solution of a solar sharger along with a bigger battery!

I think we say the same thing! He wants to reduce his bill by offsetting energy consuption (kWh for kWh) and not by selling energy to the grid (euros for euros), which makes no sense financially as the selling price is almost half the buying one! The problem is that his on-grid system is too...

Thanks for your reply. Unfortunately (and unreasonably!!), the limit is for max nominal power of solar modules installed and not for exported power. There is no limit on inverter power or battery capacity. The inverter already installed is a 8kW Goodwe unit (it was cheaper than its 5kW unit!!)...

Hello solar diyers! This my fist post and I am very glad to join this forum! Here is a situation that puzzles me for some time now. A friend of mine has installed a net-metering solar system (with battery) in his house. Unfortunately, his grid connection is 1-phase and the max PV power allowed...

Oh, but he doesn't want to SELL energy to the grid. He has a net-metering contract with the grid administrator for 25 years. According to that, he can EXPORT surplus energy to the grid and use it later (during the night) to power his home. His final electricity bill will be the net energy used...