Can a 12/24v solar panel charge a 48v lithium batery

ankitrauthan
ankitrauthan Registered Users Posts: 3 ✭
in General Solar Power Topics #1
Hi 

Plz help me I want to install a solar charging system on a electronic vehicle with limited roof, it have 48v lithium battery pack with 100ah

Question 1: can a 12/24v Canadian  solar panel 240watt 8amp be able to charge the batteries and in how much time, 5peak sun hours

Question 2: can a 48v local brand solar panel 580watt 7amp be able to charge the battery with 5peak sun hours

Plz answer
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    #2
    In general, most solar charge controllers need the solar array Vmp-array to be a higher voltage than the battery bank charging voltage (MPPT controllers are typically "buck mode" or voltage dropping type switching power supplies).

    The only "purpose designed and built" "boost type" solar charge controllers I am aware of is the GenaSun brand:

    https://genasun.eu/collections/genasun-boost-mppts

    If you want to charge a 100 AH battery pack from zero to 100% SoC in five hours of full sun (array tilted towards sun, summer in most locations
    • 100 AH * 58 volts charging * 1/0.77 panel+controller derarings * 1/5 hours of full sun per day = 1,506 Watt array minimum
    Regarding the Hours of Sun per day--Guessing Dehli Inda, flat roof (no tilt):
    http://www.solarelectricityhandbook.com/solar-irradiance.html

    Delhi
    Average Solar Insolation figures

    Measured in kWh/m2/day onto a horizontal surface:

    JanFebMarAprMayJun
    3.71
         		4.64
         		5.73
         		6.17
         		6.39
         		6.04
     
    JulAugSepOctNovDec
    5.19
         		4.78
         		4.99
         		4.79
         		4.07
         		3.45
     
    You do have >5 hours of sun per day (flat panel to roof)--Except for "winter".

    Questions?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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