There is something really remarkable about electric tankless hot water heaters. They are usually so compact, and they are really easy to install. In the right setting they can be a fantastic boon to your home comfort.
The question is, what is the right setting? Many of ideal locations take advantage of the two main qualities mentioned above - the size of the tankless hot water heaters electric and the ease of installation. These two qualities make these affordable units ideal for boosting the hot water to a shower unit or a dishwasher. They are pretty much ideal for bring hot water to an additional sink in a new en suite.
Most kinds of top selling electric tankless hot water heater are aimed to do exactly this kind of job. They are seldom thought of as replacements for the electric water tank. And to be fair, given that new tanks are available that are really very energy efficient, you are unlikely to make much of an energy saving by switching from your tank to tankless electric.
In fact most of the best tankless hot water heater options for the home involve a primary fuel like gas or oil. Gas works out cheaper than electricity - often about a third of the price - but this could always change as fossil fuel become scarcer. What we should all be doing is making the best of whatever energy we use. This means insulating where appropriate and not wasting water or heat!