Posted July 14, 20177 yr how do you guys put all the specs on your own systems below your messages . please help as I seem to have been born BC that's before computers
July 14, 20177 yr Author Thanks Bud BTW do you find the 1kw element working well okay fantastic . im also interested to try it but I have a 300l geyser cheers
July 18, 20177 yr On 7/14/2017 at 3:20 PM, maxomill said: Thanks Bud BTW do you find the 1kw element working well okay fantastic . im also interested to try it but I have a 300l geyser cheers For your 300l it would be way too small
July 18, 20177 yr I agree with @viper_za if you look at the formula posted here to heat 300l of water from 20 to 60 deg (40 deg) with 1000 w it will take about 13 odd hours to do. So it will take two days to heat up the geyser. Unless you are happy with having a hot shower every second day I think you will be in trouble .
July 18, 20177 yr 5 hours ago, PaulF007 said: it will take about 13 odd hours to do Also, on that kind of volume you'll have a standing loss of between 2.5kwh and 3kwh per day (at 65 degrees of course), so once you get it up there you're going to spend 3 hours a day just keeping it warm... :-)
July 18, 20177 yr LOL , before I had your formula I did a test with a OLD 200l geyser that I modified and a 1000 w element. It did not work at all. After three days the water just started to get hot enough that you would pull your hand way. Just for fun here is some of the pics of the project It was a push in element and the only 1000w element that I could get was a screw in and as you can see this one was gone. So I decided to convert the plate so that it will take a screw in element. Setting it up was a bit of fun but got it going and the tread was fairly quick Here is a pick of the element mounted close to a tap so that I could test it. Pity it didn't work
July 23, 20177 yr Author thanks for the info guys but what if its in a solar geyser surely that would make a difference and I could also run it off my excess pv power during the day as the solar geyser is flat plate and not very good in winter
July 24, 20177 yr 9 hours ago, maxomill said: but what if its in a solar geyser That will make a huge difference. I have a 200l EV geyser with a 1kw element and in my case I add an extra 10 to 20 deg to the geaser when I use the surplus energy for the geyser. Normally , in winter , I will have about 60 to 65 deg in the evening starting from 30 deg in the morning now we get about 75 to 80 peaking at 97 deg. So Yes it does make quite a difference.
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