Solar with Batteries would only be good as a form of back up in case of power interruption but anything a side from that, makes the cost of mining so high. The solar equipment is not cheap, this will make the ROI go much longer.

It would make sense if the use of the solar panels was maximized in areas where the there is very strong Sunshine from week to week and month to month without weather interruptions. This would however mean that one would have to mine only during the daytime. Again, longer ROI time.