Expectations of solar vs reality?

tabranger
tabranger Member Posts: 16
in Battery/Electrical & Solar
2024 T@b 400, Boondock w/ 2 BattleBorn batteries and solar. If my camper is in the driveway and it’s not pulling any power, how long should it last? Indefinitely? 5 days? Then charge to shore power?

Comments

  • Bill&Suze
    Bill&Suze Member Posts: 174
    If you have the Victron Connect app it will give you a good indication of state of charge and duration, most likely showing an infinity symbol as long as there's no draw (or very little) on the batteries. That's what mine does, although I only have one BB battery. There is always a small draw on the batteries and you might drop from a SOC of 100 to 99 overnight but solar puts you back to 100 quickly the next day. This should go on indefinitely.
    Susan & Bill, Yarmouth, Maine
    2024 T@B 400 Boondock Black Canyon
    2024 Kia EV9
  • tabranger
    tabranger Member Posts: 16
    Thank you, that makes sense. I do have the Victron app. Does this screenshot make sense? This is where I was at right before I turned off the power (red BEP switch in storage below floor).
  • tabranger
    tabranger Member Posts: 16
    Here is my Smartshunt with everything turned off (it’s been several hours). 
  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,035
    @tabranger - first screenshot indicates that you are bulk charging at 1.20 A and the shunt indicates the battery is fully charged.  The shunt rested battery voltage typically drops over several hours.  13.26 seems low.  Show us your shunt settings.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  • tabranger
    tabranger Member Posts: 16

  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,035
    I would set the tail current at .5%, otherwise, the SOC will read 100% when your battery current is 8 A.  Not sure I would set the discharge floor to 0 on any battery.  Set the charged detection time to 5 minutes (this will prevent passing clouds causing the current to drop before the voltage resulting in a premature 100% SOC.  I would turn off the Battery Charge on reset. If the battery becomes disconnected and discharges, you don’t want an artificial SOC when you hook back up.  
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  • tabranger
    tabranger Member Posts: 16
    Made those adjustments. Thank you!




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