corey66
DIY 9KW SMA TIGO System
I have a dual SMA 7.7 + 3.8 with about 9.5Kwh operation NEM2 operation today. Using Tigo optimizers and Panasonic 330-335 WATTs Panels. 4 MPPTs. I have a full 200amp service/meter and 200amp load panel before my 100amp house feed. My desire is to buy a battery system, something like the Anker Solix X1 that would drive the load panel (minus ac and pool pump) and feed the house. I use around 1.6kwh normally.
I would like to keep both inverters, as the system works great. Plug in my battery feed that charges on solar peaks and dispense the energy after sunset for NEM3 operation. I would desire when the grid is cut I would manually switch over and let the X1 take control of the load panel but I also want to run one of my SMA inverters (3.8) with only 1-2 MPPT strings operational. (I would airgap the off-grid) I can do this by using specific CCAs on Tigo and Home automation scripts. I don't want to use SMA SPS as that feature is 15a with only one phase.
The SMA inverter must have carrier L2 240v in order to feed power back to off grid. The battery system would move to charge mode most likely, thus loosing the 240v carrier then SMA inverter goes offline. I was thinking maybe to have two battery systems one charge mode and one powering the grid as an option. This would be a closed system operation which get pricey. At that point of buying two battery systems I'm now into the hybird inverters and HV battery system and I would go the path of the new SMA SBSE.
The over-voltage and load issue I think would also arise if I produce too much energy, I would have to have a special device to unload the excess energy off the closed system as a varience operation with a great earth-ground. Not sure if the SMA would in parrallel supply power in a closed off grid battery system. Has anyone ever tackled something like this. Or am I just headed for disaster and nimheadedness.
I would like to keep both inverters, as the system works great. Plug in my battery feed that charges on solar peaks and dispense the energy after sunset for NEM3 operation. I would desire when the grid is cut I would manually switch over and let the X1 take control of the load panel but I also want to run one of my SMA inverters (3.8) with only 1-2 MPPT strings operational. (I would airgap the off-grid) I can do this by using specific CCAs on Tigo and Home automation scripts. I don't want to use SMA SPS as that feature is 15a with only one phase.
The SMA inverter must have carrier L2 240v in order to feed power back to off grid. The battery system would move to charge mode most likely, thus loosing the 240v carrier then SMA inverter goes offline. I was thinking maybe to have two battery systems one charge mode and one powering the grid as an option. This would be a closed system operation which get pricey. At that point of buying two battery systems I'm now into the hybird inverters and HV battery system and I would go the path of the new SMA SBSE.
The over-voltage and load issue I think would also arise if I produce too much energy, I would have to have a special device to unload the excess energy off the closed system as a varience operation with a great earth-ground. Not sure if the SMA would in parrallel supply power in a closed off grid battery system. Has anyone ever tackled something like this. Or am I just headed for disaster and nimheadedness.