Hello, maybe I’m missing something obvious but I am unable to figure out what my average daily Ah use has been on a recent camping trip. Can anyone help me understand what I need to do to determine this (for a 24 hour period - not per cycle).
It’s impossible to say without knowing your system.
First of all you will need a device that counts the current in/out of your battery.
A BMV or SmartShunt for example.
I should have been clear. I have a SmartShunt and cannot figure out where this would be on the app. If I need to provide additional info on my system I’m happy to.
Is that not for a complete cycle though? There’s nothing I’ve seen that verifies that that resets daily. And the numbers there on my end seem too high to reflect a daily reading.
Ah, I think I understand now what you want.
No, that info isn’t available.
In the VRM portal you have this overview:
I don’t believe I have access to the VRM portal - or perhaps I’m missing something? I have a very basic setup with the following:
SmartShunt 500A/50mV IP65
BlueSolar MPPT 100/30
Blue Smart IP22 Charger 12/30 120V with one output
Seems like this is fairly basic info that many folks would want to access as they determine system capability, so I’m hoping you can help. I appreciate it greatly!
In order for the smartShunt to count a trip, you would need to note the energy counter values at the beginning of the trip
You can also save the settings, reset the shunt to factory default, then reload the settings
Or ive missed the energy counter reset button
So to confirm - other than resetting at midnight every day there is no way to get a simple daily Ah number?
If you don’t want to spend on a Cerbo. You can simply buy a cheap smartmeter and see the kW consumption. Easy to deduct from this value the Ah’s. You just split kW by the voltage of your setup.
Thanks! Keep in mind though that I’m a newbie, and I would prefer not buying/spending more and or adding components to my system in order to get this basic info. If I have to I’ll reset the app at midnight … it just seems that Victron would offer a way to manipulate app data to pull this basic info. I’ve been asked by many people helping me try to evaluate my system for the Ah, and I’m kind of at a loss?
It is not easy because to do this you need at least 2 and preferably 3 measurement devices networked together. Your SmartShunt only monitors the battery, what goes in and out. If you have a large load on the system while the solar or mains charger are running then the Smartshunt knows nothing about what the solar and mains charger are providing direct to the load. As you have a BlueSolar you can not read that with the VictronConnect app either.
You could get your batteries full, then turn off all chargers for 1day and see what you consumed.
Or turn your solar off as that is not measured, and charge from your mains charger that you can monitor. Look at the consumed Ah on the Smartshunt at a certain time and 24 hours later to see how much had been provided by the batteries and add in the Ah provided by the mains charger during that 24 hour period.
Good tips - thank you for this. It’ll help me get the numbers I need.
I appreciate your help and support!
The other option is an energy audit, add up what appliances you run for what period of time and the power they use. Divide the power in Watts by 12 to give the amps at 12V. e.g. TV, 60W, divide 12 = 5A, watched for 3 hours, consumption = 3hr x 5A = 15Ah. Fridge, 45W = 3.75A, on for 24hours but only runs about 20 minutes in every hour, consumption = 3.75 x 24 x 1/3 = 30Ah.