Cheap China Solar Controller Failure
For a couple days been noticing higher than the 14.6 voltage,.....going to 15, and even 15.5,....I knew something was not right. The next day it was showing 16, then quickly went to 17+.......I quickl...
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in use..especially inverter use, watts is the constant, as battery voltage drops thru the evening and night time use, the amps needed to produce those watts goes up
therefore AmpHrs reading goes up
but people tend to generalize, saying i used 60amphrs, when what is needed is a Watt Hr total, because that 60Ahrs is not at a flat 12v, it may started at 13.6v with solar charging and ended at 12.4v at 11pm,
just an example, in reality, that small amount of use should not have created that much drop, unless you running on a pair grp 24 , 12volt batteries
everybody tracks, charging amps and amphrs returned to the batteries,
again that is a sliding scale, and due to recharge loss, you must return more than you take out in order to get a full charge
charging creates heat during the chemical reversal of the charging, that heat is the excess "watts" used
if we use 300 watthrs per night, easy for us to do (2 ~ 3 hours of 32 inch HDTV & dvd, plus a like number of hours of PC use, lighting, electric blanket "oh yeah", the fridge use around 1kw hr per 24-day, maybe more, have to recheck my use figures from testing a few years ago
we are going to need 330~345 wattHrs to recharge the batteries, plus supply the daytime use
2.8 amps @120v is 28amps at 12v, but at 12v its recharge time
so really you are likely using 24a at 12.x volts
DC lighting and the water pump, are insignificant compared to inverter uses, and charging or using all our "information - entertainment devices"
tracking wattHrs gives one common reference which can be totaled up
and compared, use against charge
therefore AmpHrs reading goes up
but people tend to generalize, saying i used 60amphrs, when what is needed is a Watt Hr total, because that 60Ahrs is not at a flat 12v, it may started at 13.6v with solar charging and ended at 12.4v at 11pm,
just an example, in reality, that small amount of use should not have created that much drop, unless you running on a pair grp 24 , 12volt batteries
everybody tracks, charging amps and amphrs returned to the batteries,
again that is a sliding scale, and due to recharge loss, you must return more than you take out in order to get a full charge
charging creates heat during the chemical reversal of the charging, that heat is the excess "watts" used
if we use 300 watthrs per night, easy for us to do (2 ~ 3 hours of 32 inch HDTV & dvd, plus a like number of hours of PC use, lighting, electric blanket "oh yeah", the fridge use around 1kw hr per 24-day, maybe more, have to recheck my use figures from testing a few years ago
we are going to need 330~345 wattHrs to recharge the batteries, plus supply the daytime use
2.8 amps @120v is 28amps at 12v, but at 12v its recharge time
so really you are likely using 24a at 12.x volts
DC lighting and the water pump, are insignificant compared to inverter uses, and charging or using all our "information - entertainment devices"
tracking wattHrs gives one common reference which can be totaled up
and compared, use against charge
