I am planning to build an energy storage system at home. However, the logistics in my situation are not very convenient. I’ll try to describe everything.
Main house: This is where the main connection with the smart meter is located.
Shed: This has 51 solar panels (305 Wp each → 15kW). The cable between the shed and the main house is over 60 meters long. The solar panels are connected to a SolarEdge 3-phase inverter.
From this inverter, a 1.5-meter cable runs to a fuse box. From there, a 60-meter cable runs to the main house, and another 40-meter cable goes to a second house. This second house is connected to the meter in the main house.
What am I aiming for?
I want to install three Victron Multiplus 2 48/5000 units and connect them to the SolarEdge. Additionally, I want to install a 15 kWh battery. I plan to mount the Victrons next to the SolarEdge.
I understand that an energy meter is needed in the main house’s distribution board to control the Victrons. There’s already an Ethernet cable available between the distribution board and the SolarEdge (I have one spare).
Furthermore, I wonder if there’s such a thing as a relay that disconnects when the grid power fails so that I can continue running on the battery. My intention is to power everything as usual. Splitting the distribution board is too complex.
Would something like this work, or am I overlooking something?