Usefulness Of MPPT Technology
This isn't a trick question. I wish to take a "Short Course" in the reality versus hype of MPPT control... Users who have MPPT and can report real-life experience... Let's say I get a pair of panel...
Forum Discussion
I need to clarify my thoughts...
The A/C system is 28 volt powered (24)-2 volt series paralleled (twinned) jars 3,300 amp hours
The inverter is a Trace 4024.
The A/C is a 5,000 BTU 10.6 EEF LG unit. It endures a 100% duty cycle.
I would like to run the AC for 5 hours a night
I also have a 12 volt Kyocera group 31 battery LED lighting and BiPap system. That critter works fine.
I have enough batteries to move my house down the highway but obviously I need to keep it topped off.
I use shore power for the refrigerator, and 2 freezers.
Public power costs 5 cents kWh for the 1st 150 kWh.
10 cents an hour from 150 to 250 kWh
25 cents an hour to 500 kWh
Fifty cents an hour when DAC triggers. DAC triggers when TOTAL accumulated kWh exceeds a certain amount in an aggregate total of many months. Then DAC rate lasts for a half year. Fifty cents a kWh hour even if the total bill in DAC rate is solely 1 kWh it will cost fifty cents.
In DAC rate the AC cost is twenty five cents an hour. Sorta nasty for a wimpy window AC. But add the freezers on top of that and WOW, we're talking several hundred dollars per billing cycle.
Without AC I can manage to avoid DAC.
34C with 85% R/H is a little tough at 0300 hours. At dawn it drops to 29C and 95% R/H.
The nearest gas station is a 88 km round trip.
Yeah I'd love to add more panels as my bank account repletes, and thumb my nose at Comision Federal de Electricidad, and run the A/C 24/7.
The A/C system is 28 volt powered (24)-2 volt series paralleled (twinned) jars 3,300 amp hours
The inverter is a Trace 4024.
The A/C is a 5,000 BTU 10.6 EEF LG unit. It endures a 100% duty cycle.
I would like to run the AC for 5 hours a night
I also have a 12 volt Kyocera group 31 battery LED lighting and BiPap system. That critter works fine.
I have enough batteries to move my house down the highway but obviously I need to keep it topped off.
I use shore power for the refrigerator, and 2 freezers.
Public power costs 5 cents kWh for the 1st 150 kWh.
10 cents an hour from 150 to 250 kWh
25 cents an hour to 500 kWh
Fifty cents an hour when DAC triggers. DAC triggers when TOTAL accumulated kWh exceeds a certain amount in an aggregate total of many months. Then DAC rate lasts for a half year. Fifty cents a kWh hour even if the total bill in DAC rate is solely 1 kWh it will cost fifty cents.
In DAC rate the AC cost is twenty five cents an hour. Sorta nasty for a wimpy window AC. But add the freezers on top of that and WOW, we're talking several hundred dollars per billing cycle.
Without AC I can manage to avoid DAC.
34C with 85% R/H is a little tough at 0300 hours. At dawn it drops to 29C and 95% R/H.
The nearest gas station is a 88 km round trip.
Yeah I'd love to add more panels as my bank account repletes, and thumb my nose at Comision Federal de Electricidad, and run the A/C 24/7.
