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: 527 ✭✭✭✭
    #2
    First question: How many freezers and how many refrigerators?

    Second question: Rated power consumption for both of these.
    Island cottage solar system with approximately 2300 watts of panels, 1kw facing southeast 1.3kw facing southwest. 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 32nd 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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