Technically – yes you can add solar to another electric tank, however some things to consider are:
- Your warranty may be void on the tank and/or the solar collector.
- You will need to purchase extra “retro-fit” valves
- The efficiency of the system will be lower as the components have not been designed to complement each other.
- You will not qualify for any solar incentives
- How long will your existing tank last? And what will the costs be in the future to change it?