float charge question

palausystem
palausystem Solar Expert Posts: 124 ✭✭✭
edited March 2019 in Off Grid Solar & Battery Systems #1

My newish US Battery REL 16 XC batteries want 2.17v per cell for float charge. My Sunny Island Charger which spends most of its time in float, has a 2.2v minimum. Does anyone think I should be concerned? SMA suggested I could drop the system voltage down a little to compensate...?

Off-grid 48v, 3 kw PV, Sunny Island 5048U, SunnyBoy, US Battery RE L16XC  6v, 800ah, Genset: Kohler 8.5 RES propane.
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Comments

  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #2

    If you're cycling off-grid, I wouldn't worry about float a bit high.

    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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  • palausystem
    palausystem Solar Expert Posts: 124 ✭✭✭
    #3

    Thanks, I thought it was probably close enough. .03v higher.

    Off-grid 48v, 3 kw PV, Sunny Island 5048U, SunnyBoy, US Battery RE L16XC  6v, 800ah, Genset: Kohler 8.5 RES propane.
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