Water Heater

[NE1]

Need advice please , I want to fix something in my bathroom that heats up water. 

I don't want a shower unit or anything that requires pressure.

Sort of a 30/50 litre tank that water will be fed into , heated up then gravity feed into a larger container.

Nothing fancy .

[bankruatsteve]

There are several methods using solar that can be simple for just heating water, but what would the "larger container" be?  

Edited October 19, 2019 by bankruatsteve