Recently came across the “Victron Energy BPR065022000 Smart BatteryProtect 12/24V-65A”
Would this be a good thing for me as I recently ruined a set of two AGM batteries in my Airstream. I let them discharge below the correct voltage level and didn’t recharge them for two months. (I had no experience with these batteries and the acceptable voltage range–I now have that experience!)
My rig is 12v and max shore power is 30a.
Looking for your advice and suggestions.
THANKS!
Yes you can use it for this. You need to buy a 65A, 100A or 220A unit depending upon your maximum current draw. The only problem you have is in choosing what voltage to set it at because under heavy current draw the battery voltage sags, but the battery can still be full. But if you choose to low a voltage to allow for large voltage sag, then when you only have a small draw, i.e. you have left a single light on, then the battery can be flattened before it reaches the cut off. No one can give you a specific voltage because systems vary in battery capacity, type and current draw.
Thanks!
I already have the shunt “Battery Monitor BMV-712 Smart” but struggling to install it with my Airstream’s battery cables and the M10 bolts…
Appreciate this forum!
Please be aware that the BatteryProtect range is unidirectional in operation, so for discharge protection you’ll need to separate your wiring at the batteries - only the loads can run through your BatteryProtect, you must not run a charger through it.
Do you have a diagram on how this is connected. I’m having the same issues. I ruined my first BatteryProtect when charging my batteries. And my inverter is having issues now.
Thx!
The manual has basic installation drawings. Victron also publish example schematics.
To keep the battery healthy, it needs to be at 100% all the time. You should really look at a trickle charger, either AC or solar, to keep it topped up. You lose capacity after months of no use without a load connected.
Thank you for all of your help, it gives me a better idea on trying to set up this project properly.
Regards,
Michael
It looks like the Smart Battery Protect is only designed to work/communicate when a Victron inverters and it’s meant to power DC loads directly (and control when they turn off). Does this mean this device will only control Victron inverters via a remote switch? Or can they work with none Victron inverters?
The Smart Battery Protect can work standalone based on the voltage setting. It only works in one direction, either isolates chargers or loads but not both. The manual describes the different operating modes.
So does this mean that in order to isolate both you’ll need two BP’s?
Yes, one for chargers and one for loads if you need over voltage and under voltage protection. If you are only using it for under voltage then you only need one, but the loads must be separated from the chargers. You can not use it on inverter/chargers.
I have used a m10 to m8 reducing sleeve in the brass flavour to fix this problem with the m10 bolts.
Regards,
Please explain exactly what you are wanting to achieve. Do you have lithium or lead acid batteries and what equipment you have.
I have two SLA batteries in parallel
one VICTRON 500 Amp Smart Shunt on the negative side. One VICTR ON Smart Battery Protect on the positive side. I would like for my BP to be able to shut down my inverter, and all of my 12 Volt devices when my batteries reach a certain (low) voltage. So that my charger have a chance to recharge them before they get damaged.
Ok, is the inverter a combined inverter/ charger or just an inverter.
Does the inverter not have a low voltage shut down.
Inverter/Charger not sure!
You can’t use the battery protect to connect to an inverter. It has those details in the manual.
Here is a drawing of how to set up the SBP to shut down your DC loads but leave the ac charger connected to recharge the battery.
I can not add any detail on the inverter as inverters MUST not be fed through the SBP as noted above or they get damaged by the inrush current. The SBP manual notes that for Victron inverters you can connect the output from the SBP to the remote H terminal but I do not know what your non Victron inverter capabilities are. You should at least make sure that the inverter has a low voltage shutdown, and if possible configure this to a suitable value.
