People waste a lot of energy in solar, they just don’t know it. Even in the rain I am heating water. This heating system works in parallel with a MPPT charge controller using the same panels. Any additional power not used for charging the battery is used to heat water. A super efficient affordable system for a small camp. It just takes a little talent to build.
The 2019 season at camp will create a number of new videos as I put theory to practice. See my prior DIY solar videos for further details.