More Solar for "Us"
Ok, I went off.the deep end? Bought 3 used 37watt uni-solar panels and a blue sky 2000e controller for the hefty price of $400, They were being listed as 75w panels, they are not The tested open...
Forum Discussion
two day job
day 1 i ran the generator in the morning, got a really good charge on the batteries and then set the max solar voltage output at 14.7
day 2, no morning generator, I adjusted the mppt tracking for max amps output using the in line Turnigy power meter to track the amps going to the batteries, NOT the indicator led on the controller circuit board !!
i gained several amps charge rate during the morning sun
and saw the mid day sustained rate climb to a higher value
Friday registered a peak of 278w charge rate 21.32 amps
Sat recorded a peak of 269w charge rate of 20.12
this morning was party cloudy/hazy
i expect a higher daily total when we get a full clear sunny day
got 26.xx ampHrs 300+ watt hrs Sunday in the rain storm that dropped almost 2" of rain
these new readings are a lot closer to my Original expectations
the blue sky manual says its important to adjust the mppt when the batteries are low/discharged and to adjust for max current
i think that was my earlier mistake, i adjusted mppt during the mid solar day with max voltage and batteries already significantly recharged
mppt gains are best realized in the morning at the start of the charge cycle
when batteries are lower and it takes less voltage to charge them and you want maximum amps
day 1 i ran the generator in the morning, got a really good charge on the batteries and then set the max solar voltage output at 14.7
day 2, no morning generator, I adjusted the mppt tracking for max amps output using the in line Turnigy power meter to track the amps going to the batteries, NOT the indicator led on the controller circuit board !!
i gained several amps charge rate during the morning sun
and saw the mid day sustained rate climb to a higher value
Friday registered a peak of 278w charge rate 21.32 amps
Sat recorded a peak of 269w charge rate of 20.12
this morning was party cloudy/hazy
i expect a higher daily total when we get a full clear sunny day
got 26.xx ampHrs 300+ watt hrs Sunday in the rain storm that dropped almost 2" of rain
these new readings are a lot closer to my Original expectations
the blue sky manual says its important to adjust the mppt when the batteries are low/discharged and to adjust for max current
i think that was my earlier mistake, i adjusted mppt during the mid solar day with max voltage and batteries already significantly recharged
mppt gains are best realized in the morning at the start of the charge cycle
when batteries are lower and it takes less voltage to charge them and you want maximum amps
