A 12 to 20 gallon tank on a 120 V circuit stores enough for a short shower, a washer load or a small cabin, without the 240 V circuit a full-size heater needs. The trade-off is reheating: Ariston rates its 1,500 W, 20 gallon model at 7 gallons an hour, so once the tank runs cold it takes hours to fill with hot water again.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Full ranking 5
- GE 18 Gallon Point of Use#1 of 5Full review
An 18 gallon plug-in tank with an eight-year warranty, for a small apartment, cabin or a washer far from the main heater. The best large pick.
Amazon $296.65$296.6518 gal1,500 WPlug-in - Ariston POU 20 Gallon#2 of 5Full review
A 20 gallon, 120 V tank that fits under a counter, for a small apartment, cabin or in-law suite, with six years on parts and tank.
Amazon $351.50$351.5020 gal1,500 W- - VEVOR 18 Gallon Tank Water Heater#3 of 5Full review
A cheap 18 gallon tank for a shop, barn or utility room. With no published warranty, the GE 18 gallon is the safer buy for a home.
Amazon $219.90$219.9018 gal1,600 W- - Ariston POU 12 Gallon#4 of 5Full review
A 12 gallon tank for a bathroom or kitchenette, with six years on parts and tank. Larger tanks cost little more.
Amazon $313$31312 gal1,500 W- - ThermoMate ES2000 18 Gallon#5 of 5Full review
An 18 gallon hardwired tank for a shower or washer. The GE 18 gallon costs less, plugs in and carries an eight-year warranty.
Amazon $399.70$399.7018 gal1,500 WHardwired
