By far the best shower tankless electric water heater on the market right now is the EcoSmart ECO 11. The solid build and self-modulating technology of this water heater make it the best choice overall. If your electrical system and water piping will support it, we can recommend it without hesitation.

Our Best Value pick is the Atmor AT-EJSH-5 100 Series water heater. It’s inexpensive and is made to provide hot water to your shower. If you want to try out tankless hot water heaters, this is a great one to start with.

For Best Quality, our vote goes to the Sio Green IR260 v2, which has received nothing but praise from every review that we could find. It’s a sturdy unit that has a ton of adjustment features to make sure that you get the perfect shower each and every time.