Gary, that is great. I just didn't have time to do the calculations.
What it does show is that the the flow rate is on the high side. Remember that the flow rate has a relationship to the amount of heat collected on the absorber so that is what your flow should depend on. As you don't know this, with this panel, I would start with a RESOL controller with variable speed where you can set the parameters. That way you will get the optimal flow rate.
Doax, you only need 40% propylene glycol not 50% so you pumping should be a bit easier.
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