The balcony has a location to install solar energy, I want to install an electric water heater in th

Wall-mounted, whether you need electric heating depends on your local climate. Of course, it is good, but it also costs electricity, so it is recommended to connect a small electric water heater.

It didn't matter.

You don't have hot water in the collector, you go with antifreeze. >>>More

Install a special water faucet for washing machines before the water inlet valve of the solar energy, and it does not affect.

Don't use cement.

Use glass glue (also called sealant). >>>More

First, the medium circulation pipe is not more than meters Second, the height difference between the heat collection outlet and the medium port of the bucket is not less than meters Third, the closer the hot water point is to the bucket, the better Fourth, add a three-way valve on the medium pipe (convenient for maintenance and release of the medium) Fifth, add an external descaler on the cold water pipe (prolong the life of the electric heater) It is better to have a medium to replenish the liquid (just buy one online).