Aili battery monitor problem

Watho 46 · Jan 16, 2021

Evening guys
My setup is - start battery and 2 Aux batteries running a CTek DCDC SE charger to 3rd battery which is linked to 2nd battery under the bonnet, I also have 250 watt solar panel on the roof running through a MPPT charger and running a
40 lt Engil fridge.
I thought to make life simple I would add a cheap battery monitor so all the info was in one place, I found and nice and cheap unit ( with good revues) from amorzon for about $75 delivered, the Aili battery monitor
Wiring has been check again and again but the problem I'm having is every thing reads great but the percentage doesn't seem to adjust itself when being charged ie unit has been in the patrol now for a week all batteries are charged and sitting round 12.5 to 13 volts but my percentage is now down to around 35% and dropping ??
Not sure if it's something I missed or a problem with the unit, it's not a major but would be nice to get right.
Thanks for any advise or help
Cheers watho

GQshayne · Jan 16, 2021

I do not have the same monitor as you, but mine needs to be programmed. You need to tell it the total capacity of your system. In my case I also have two auxillary batteries, so the total capacity needs to be set to that. If I disconnect one then the % is out. Voltages are still correct of course.

Watho 46 · Jan 16, 2021

Thanks Shayne
Capacity has been set at 210.0 ie 2 x 105 AH batteries

Cheers Watho

GQshayne · Jan 17, 2021

Watho 46 said:
Thanks Shayne
Capacity has been set at 210.0 ie 2 x 105 AH batteries

Cheers Watho

Have you tried to set it to just one battery and test it?

Yeti's Beast · Jan 17, 2021

I have a Ctek battery monitor connected to two 120 ah batteries in the camper.
Max ah I can set it to is 200 ah
It still works fine like that.
It tells me the volts and has a graph of the voltage plus the temperature.
Every 7 days it sends me a message to go check the batteries and it will show a percentage of charge. They are on solar without any draw so they sit at 100% all the time.
My car has one too.
I have a stand alone solar set up in the canopy for the fridge.
60 liter Waeco, 160 watt panel and a 105 ah agm.
It sits on 100% most times but will drop a little if we have a few cloudy days.
I have never seen the volts fall below 12.7.

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Watho 46 · Jan 17, 2021

thanks guys
I saw another vid yesterday and was able to reset the percentage back to 100%, so will see if things charge today
Evert thing is working fine but the percentage is the only thing out ie dose not go up and down as power is going in or out

Cheers Watho

Yeti's Beast · Jan 18, 2021

Put the batteries on a charger and see if that helps

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Aili battery monitor problem

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