Apr 23 2018, 11:03 AM
QUOTE(kk131 @ Apr 23 2018, 08:49 AM)
I don't know what experience your statements are based upon. I've live in 2 house were we installed a solar water heater, the first was a plastic panel type, it was good most of the year apart from a few days at the end of the year when the water wasn't warm. We have a vacuum tube type panel now, the performance is much better, I would estimate there are 2 -3 days/year when we have to use 100% water from the hot tap for a shower. We don't have electric water heaters.
To add, performance of the panel depends upon the location. best solar gain is generally in the mornings. Afternoons tend to be more cloudy.
Yeap same here, only when there is continuous downpour over a period of two to three days, that the back up heater needs to be switched on. This is partly due to my installation location (for aesthetic reasons) meaning, that the solar panel will not get a good sun exposure.To add, performance of the panel depends upon the location. best solar gain is generally in the mornings. Afternoons tend to be more cloudy.
Prior to installation it is best to consult with the heater manufacturer, on the best location for installation. Many of this heater sales person will willingly come down to provide this advise. This is the crucial step which I missed, and at present my heater only gets the sun rays from mid afternoon until evening; best location, would be to maximise the sun rays, especially morning to mid day sun; as downpours usually occur towards the mid afternoon to evenings at KL.
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