Battery bank - pico hydro - Help!

jamie2020
jamie2020 Registered Users Posts: 1 ✭
in Off Grid Solar & Battery Systems #1
Hi, am from the remote Baelelea region of Malaita island in Solomon Islands.  Am acquiring a pico hydro 3kW system (correcting for overall efficiency useful power at 2.4kW) to run a community primary school, rural clinic and about 60 households in 4 small rural villages, estimates at 600-700kWh/day consumption. 

I need your help regarding building a battery bank especially to maintain clinic and frozen goods, assumption, two days of autonomy during maintenance of power stations and or necessary shutdowns during thunderstorms. Need to build a battery bank. What capacity should the battery bank be? How many 12V batteries would I need? 

Many thanks, 
Jamie
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  • 706jim
    706jim Solar Expert Posts: 520 ✭✭✭✭
    #2
    First question: How many freezers and how many refrigerators?

    Second question: Rated power consumption for both of these.
    Island cottage solar system with appriximately 2500 watts of panels, 1kw facing southeast 1.3kw facing southwest 170watt ancient Arco's facing due south. All panels in parallel for a 24 volt system. Trace DR1524 MSW inverter which has performed flawlessly since 1994. Outback Flexmax 80 MPPT charge controller four 467A-h AGM batteries. Insignia 11.5 cubic foot electric fridge 1/4hp GSW piston pump. My 31st year.
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  • petertearai
    petertearai Solar Expert Posts: 471 ✭✭✭✭
    #3
    3kw  for 60 houses and a school? Did i read that correctly ?
    2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . Mate 3. victron battery monitor . 24 volts  in 2 volt Shoto lead carbon extreme batterys. off grid  holiday home 
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
    If your daily load is 600kwh, and your charger is 2.4kw, you need 250 hours in a day to supply that load ???
    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

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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