24 volt battery bank????

System
System Posts: 2,511 admin
in General Solar Power Topics #1
I just cant get my head around this.
say you have two 200 amp/hour 12 volt batteries.
you wire them in series and get 24 volts at 200 amp/hours.
now you wire them in parallel and get 12 volts a 400 amp/hours.isnt this a better deal? I thought it was amp/hours you're after.
so whats the benefit of a 24 volt bank other than being able to use smaller wire?
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
    Re: 24 volt battery bank????

    It's KW hours (Watt Hours) Electrical power is a combination of Volts and Amps = watts That's why the electric company has a Watt meter and bills you in Killowatt Hours.

    24V @ 200Ah = 4800 watt hours

    12V @ 400Ah = 4800 watt hours

    except that in the 12v system, more power is lost in resistance in the wires, That's why the power company's ship power cross country on 50,000V high tension lines, less loss. They convert it in the local neighborhood, and finally on the pole in your back yard
    Powerfab top of pole PV mount | 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

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