Expectations of solar vs reality?

tabranger

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?

Bill&Suze

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.

tabranger

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

Here is my Smartshunt with everything turned off (it’s been several hours). 

Sharon_is_SAM

@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.

tabranger

Sharon_is_SAM

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.  

tabranger

Made those adjustments. Thank you!