Logan5. Can a 48v solar step-down charger charge as 24v battery bank?
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48v to 24v converter
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so your array is providing 48 volts and you want to charge a 24 volt battery? For this you do not use a step down converter. You would use a quality MPPT Charge controller. MPPT charge controllers can handle over 100v array input and will allow your to charge your 24v battery. Some high quality MPPT CC's can handle in excess of 150v array input. Higher array voltages allow longer wire runs over smaller wire with min. loss.Comment
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There are a number of charge controllers that can charge batteries systems ranging from 12v, 24v or 48v. But only one voltage at a time. The input voltage to the CC from the solar panels has to be above the battery voltage.Comment
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Originally posted by Logan5 View Postso your array is providing 48 volts and you want to charge a 24 volt battery? For this you do not use a step down converter. You would use a quality MPPT Charge controller. MPPT charge controllers can handle over 100v array input and will allow your to charge your 24v battery. Some high quality MPPT CC's can handle in excess of 150v array input. Higher array voltages allow longer wire runs over smaller wire with min. loss.Comment
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Originally posted by Logan5 View PostI hope you read what others had to offer as well.Comment
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Sizing your arrays to 144V is a mistake, unless you live in the Caribbean where it never drops below 67F. Otherwise, the first chilly morning - say about 35F, comes along, your arrays wake up with 170V and fry your charge controllers.
You should use the PV string sizer the Controller Mfg provides on-line, you input your array specs, and your 50 year record low temp, and it advises you if your array is properly sized.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
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Originally posted by Mike90250 View PostSizing your arrays to 144V is a mistake, unless you live in the Caribbean where it never drops below 67F. Otherwise, the first chilly morning - say about 35F, comes along, your arrays wake up with 170V and fry your charge controllers.
You should use the PV string sizer the Controller Mfg provides on-line, you input your array specs, and your 50 year record low temp, and it advises you if your array is properly sized.Comment
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