I use youtube to checkout others system and to try and learn more. I have seen more then one off grid system with ac battery chargers attached to their battery banks to keep up charge on cloudy days. Is this advisable ? If so , should you charge as a trickle charge or fill charge ?
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for small 12V systems, automotive battery chargers will work in a pinch in cloudy weather.
larger systems use dedicated chargers like golf cart or forklift chargers, and are run from 6-10Kw 240V generators
Other large systems use a charger function inherent in the main inverter, used as a high amp charger, my inverter, for example, can charge my 48V bank at 100A, given enough generator.
Just about every system has different needs, and gets the design adjusted to fit bestPowerfab 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-Lister -
Originally posted by carolinaken View PostI have seen more then one off grid system with ac battery chargers attached to their battery banks to keep up charge on cloudy days. Is this advisable ?
Stop watching You Tube idiots.
Last edited by Sunking; 03-22-2018, 10:01 AM.MSEE, PEComment
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Originally posted by carolinaken View PostIs there an ac charger that would kick in only when battery bank is low and needing help ?
MSEE, PEComment
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Originally posted by carolinaken View PostI use youtube to checkout others system and to try and learn more.Comment
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Originally posted by carolinaken View PostEven if charger run in 3amp mode ( trickle charge ? )
You would need a very intelligent sensing device to measure the voltage at say 12.4 volts and then start up a charger (from some AC power source) to get the battery back up to Full SOC. Or just set up the charger when you manually measure the battery voltage is low or if it is a cloudy dsy.
I would not rely on something to automatically do this for you if your battery is a critical part of your power supply. An emergency generator that senses the loss of the grid power is a much better investment to keeping power on at the house.Comment
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Originally posted by carolinaken View PostTHANKS FOR THE INFORMATION.. How often than should I top off my batteries.. every month every other month ?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
Comment