Yeah as explained clearly by ceo684, lower rated power doesn't mean energy saving at all, it just means its heating time taken to heat the same amount of water is slower compared to those with higher rated power.

For instant water heaters where their heating elements are usually only switched on when water is flowing, higher power ratings usually equates to hotter output water temperature if the water flow rates are the same; while for storage water heaters where heating also take place when water is not flowing, higher power ratings usually equates to faster heating time taken to reach to its maximum rated temperature for the same amount of water.




Also, SEERS' product description (highlighted in yellow above) mentioned it has a power consumption 3,000 Watts, but specification (bracketed in red) shows rated power at 660 Watts. Quite confusing

Additionally, one reason why I didn't get SEERS is that most conventional storage water heaters like CENTON, ALPHA, & JOVEN heats up to a max water temperature of 70-75°C, while SEERS is only 60°C. If SEERS outputs only 60°C, by the time the hot water travels thru the piping, lots of heat loss has already taken place, and the output water temperature when it reaches users might not be as hot, unless the SEERS storage water heater is placed very near to the user with minimal water travel required.

This post has been edited by Selene Yeo: Jul 10 2023, 06:27 PM

Thanks for a lot of inputs.
Side question:
Does the storage heater and solar water price different a lots? Especially for a 3 bathroom house?

Not sure about this since solar water heater is way above my budget. But I would imagine solar water heater is basically a storage water heater powered by a dedicated solar panel, hence it will be like paying for a storage water heater plus an additional solar panel. Not too sure about this.