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how much energy does my solar panel generate

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Posted by KD on March 21, 2007, 8:15 pm
I'd like to monitor how much energy my solar panel generates in terms of
KWh. My assumption is that I would need to monitor the actual work load by
determining the energy required to heat a know volume of water on the tank
through a know temp rise. This should take into account the water already
used or being used. Any other ideas or suggestions? Is there equipment I can
buy that will do this for me?

Posted by Christian Kaiser on March 22, 2007, 10:35 am
Here at my place, I know the flow of the water that heats up the storage, as
well as the temperatur of that water entering, and the temp of the water
leaving the storage. So I can calculate the energy transferred into the
storage (temp diff times heat capacity times mass per hour...).

Buy a flow meter and two temperature devices, and put everything together
using a microprocessor and some hours of work ;-)


Posted by DJ on March 22, 2007, 11:14 am
Yep, one of these would do it nicely.


You tell it the flowrate, it tells you the kWh.


Posted by nicksanspam on March 22, 2007, 12:55 pm

And if we want to measure the flow rate automatically?


Posted by Christian Kaiser on March 23, 2007, 6:59 am
 Insert a flow rate meter into a tube.


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