Originally posted by Sunking
View Post
Announcement
Collapse
No announcement yet.
Most Popular Topics
Collapse
Freezer Wattage
Collapse
X
-
-
Originally posted by Shmel View PostIf I understand OP correctly, his monitor averages out power consumption over time. I.e. it is plugged in for 10 hours. During this time his fridge is running at 500W for 2.5 hours and idles for 7.5 hours. 1250 watt hours of energy are consumed during 10 hours, not 2.5, giving 125W of average power consumption. This number is displayed by the monitor.
The best monitoring meter I've met, is the Kill-a-watt, you plug an appliance in, and wait a week. It will tell you the watt hours that have been consumed. Raw numbers, then you can average them or whatever.
Batteries should be measured in watt hours, and you should only use 20% of them in a day.
500W x 2.5 hours = 1250wh consumed.
For a fridge, you need to totalize the power over several days, to account for day/night usage, defrost cycles, and door openings.
Inverter power is important, as the inverter needs to supply enough surge power to start the compressor motor, usually at least 5x the nameplate amps. Sometimes as much as 10x is needed to start a motor.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
-
Originally posted by kimo View PostThis makes sense to me and I'M a solar 1st grader. Thanks for explaining it in simpler language.MSEE, PEComment
-
Originally posted by Mike90250 View PostYou can come up with fancy ways to explain the meter, but none are valid.
To determine the power of inverter which is needed to run the load, you need to know a peak power consumed, which this monitor does not record. But for a fridge you can estimate it by looking at instantaneous readings during first 45 minutes of monitoring when the fridge compressor switches on.Comment
-
I'm glad you got it figured out. I guess I was not much help.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
-
Originally posted by Mike90250 View PostI'm glad you got it figured out. I guess I was not much help.
B. It's the thought that counts (although results are nice too!)SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
Comment