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With something like this, throwing in solar makes a lot of sense (IMO). There are already batteries involved so you could use solar as the primary recharge mechanism with the grid as a backup.



A single apartment complex could almost certainly not cover enough space with solar panels in order to charge a battery to accommodate this.


That's the neat thing, it doesn't have to. Every kWh that goes into these batteries is a kWh not purchased from the grid. The payback for the solar panels would very quickly add up.

In fact, trying to 100% charge the batteries via solar would not be the most economical way to operate as then you are just wasting money sending power back to the grid.




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