Hi all,

currently I am using instant electric water heater (not solar, and without tank).

are there any higher capacity heater outside or are they standard?

thanks?

3.6kW is the standard here and more than sufficient unless you have crocodile skin or you live in Genting or Cameron H. You might be able to get higher wattage ones in electrical shop or shopee/lazada.

https://www.panasonic.com/my/support/produc...p/dh-4hp1m.html

Has 4.8kW rating.

https://www.joven-electric.com/internationa.../sa-series.html

Joven SA series has a 5.2kW max rating,

This post has been edited by LamboSama: Jan 12 2025, 09:36 AM

thanks...will check out

Make sure your home wiring is capable to handle the additional wattage, minimum 4mm cable

our houses usually put 20A breaker n corresponding wire gauges for aircond n heaters

3.6kW is the norm n for good reason cos there's some tolerance>3600W/240V=15A

if u up the appliance to one with a higher current draw, for e.g. a 4.8kW one, then>4800W/240V=20A

assuming u run the heater at full output n for a prolong period of time, this means u r running the heater at or near the tripping threshold of the breaker n the wires r gonna get warm pretty fast - a potential fire hazard waiting to happen

if die2 must put more powerful heater, then change out all the 3 wires to the MCB with lower gauge (thicker) ones n the breaker itself (mayb a 30A class B one)

Can oso install an individual RCCB at the heater termination point for added peace of mind

Before I list down some suggestions for you, a clear reminder that the higher the power rating of the water heater, the higher the electrical components and wirings minimum specification requirement, as stated in the Suruhanjaya Tenaga guidelines (shown below) and the water heaters' instruction manuals.

Some installers will tell u that it is not necessary to follow the Suruhanjaya Tenaga guidelines and the water heaters' instruction manuals, and that u can use some of these water heaters with lower spec electrical components and wirings. This is NOT RECOMMENDED, as if anything bad (touch wood) were to happen (eg. fire or electrical shock hazard), u are basically at fault for not following the Suruhanjaya Tenaga guidelines and the water heaters' instruction manuals, and will have a tough time claiming insurance / liability.





a. The most common instant water heaters in Malaysia ranges from 3.6kW to 3.8kW.

b. At a slightly higher level, there's the 4.2kW to 4.5kW range, including:
- CENTON EcoSerene 4.2kW (most of CENTON models are 4.2kW too) [link here - Shopee / Lazada] - Highest 5 star rated instant water heater on Shopee in this range.
- DEKA AQUAS 88 4.5kW [link here - Shopee / Lazada]

c. For highland areas (eg. Genting, Cameron, Frasers), there's the 4.8kW to 5.5kW range, including:
- PANASONIC DH-4HP1M 4.8kW [link here - Shopee / Lazada]
- CENTON Serene Highlands 5.4kW [link here - Shopee / Lazada]
- JOVEN SL30 5.5kW [link here - Shopee / Lazada] - Quite problematic to purchase online since this model I think has a few power ratings, and online sellers usually just label it with a range of 3.6kW - 5.5kW. If u plan to get this model, best to double confirm with the seller before purchase.

d. If you are using it to connect to your own shower accessories, or to multiple outputs (eg. shower and sink), then get a multipoint instant water heater (doesn't come with any shower accessories or stop valves). The only one in the market I think is CENTON Forza 5.5kW or 7.0kW [link here - Shopee / Lazada]

e. If you have installed a booster pump at your water source, then most likely instant water heaters listed above (with the exception of CENTON Forza 7.0kW) won't be hot enough for u. Hence, it is best to go for storage water heaters. The best selling and highest 5 star rated one on Shopee is CENTON Neptune [link here - Shopee / Lazada]


Alternatively, besides power rating (the higher it is, the higher the output water temperature), input water temperature (the lower it is, the lower the output water temperature) and water flow rate (the higher it is, the lower the output water temperature) plays a key factor as well. I extracted this table from CENTON's website, showing the temperature rise u can gain after going thru the instant water heater (pretty much the same across all brands, it is basically a physics calculation) for the different power ratings and water flow rates.



So if u want to increase your output water temperature but don't want to spend money to upgrade your instant water heater, just lower down your water flow rate (using the stop valve) and your output water temperature will increase slightly.

This post has been edited by Selene Yeo: Jan 12 2025, 11:35 AM

thanks, am learning a lot from this...