MPPT Solar Controller Driveway Test
The weather forecast for tonight is 'mostly clear' and for tomorrow 'mostly sunny'. After that, the forecasts all include various degrees of cloudy without any mention of sunny. Today, Sunrise is 6:1...
Forum Discussion
BFL13 wrote:
....
Do the TPA and the Kill-A-Watt use different constants?
Do you suspect something does not match from previous results?
You do good tests. I still have the info about AGM and high amp draws in mind that I remind folks about who want to run their microwaves, but only have room/weight allowance for two batteries.
Thanks for the complement.
I'm not sure what constants are.
Yes, I spent Thu and Fri setting up the test environment. On Thu there was a brief period of partial Sun where I tried the Air Conditioner for 3hrs . KAW recorded .87 KWH and the TPA recorded 412 WHs. Using the formula 50x + 550y = 870, I solve x as 3hrs fan time, or 150WHs, and y = (870-150)/550, or 720/550 = 1.3hrs of compressor time. Afterwards I discovered a warm connection which I corrected.
During these two days I also got comfortable with video capturing and I now know how many hours I can record.
I plan to report power in Watts and WHs as I do not have any capability of capturing AHs. It should be interesting.
HTH;
John
