Sunsaver MPPT bulk charge setting?

System
System Posts: 2,511 admin
in Solar Beginners Corner #1
I was looking at the custom settings in my new Sunsaver MPPT controller, and I only see a place to change the Absorption and Float voltage.

Does the Bulk voltage basically run up to where the absorption is set? Then switch into absorption at that point when the current drops? So the absorption voltage is the top setpoint for the bulk phase?


Thanks

Greg
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Comments

  • BB.
    BB. Super Moderators, Administrators Posts: 33,642 admin
    #2
    Re: Sunsaver MPPT bulk charge setting?
    saddledown wrote: »
    Does the Bulk voltage basically run up to where the absorption is set? Then switch into absorption at that point when the current drops? So the absorption voltage is the top setpoint for the bulk phase?
    Exactly, the Absorption Voltage is the transition from Bulk to Absorb charging phases.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • System2
    System2 Posts: 6,290 admin
    #3
    Re: Sunsaver MPPT bulk charge setting?

    Thank you! That settles that.
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  • niel
    niel Solar Expert Posts: 10,300 ✭✭✭✭
    #4
    Re: Sunsaver MPPT bulk charge setting?

    bb is correct and there was some confusion for a time about bulk voltage. bulk voltage slowly rises as the battery charges, but changes to absorb as soon as the absorb voltage is reached making bulk voltages as irrelevant.
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