Lithium not operating hab door lock

[Abacist]

I have a Stirling twin lithium battery setup and a Vanbitz battery master. In the winter they started at 100% after Autumn holidays away in it and a week ago they had declined to 41% capacity as the van is in the lee of the house and the solar gets no sun in winter.

My concern is that at 41% capacity there was insufficient power to operate the main hab door so I had to use the key to both open it and then lock it again.

When I checked again when the batteries were full again the door lock performed completely normally.

I was surprised at the lack of power to operate the lock and did not expect this with the batteries at 41% when they are supposed to be able to go much lower.

Does this mean that the cab battery is not being kept with sufficient power by the Lithiums when they get below a certain level as its the cab battery that should be responsible for the door lock?

Love to hear funsters thoughts on this!

 

[Lenny HB]

I helped sort a couple of Funsters sort out where the cab batteries were not getting enough charge from a Lithium via a Batterymaster.
Lack of winter sun in Scotland was the problem.

Changed the Batterymaster for an Ablemail Battery Maintainer, problem solved. The Ablemail has seperate stinings for Lithium and can be programed with your own settings if required.

 

[Abacist]

I helped sort a couple of Funsters sort out where the cab batteries were not getting enough charge from a Lithium via a Batterymaster.
Lack of winter sun in Scotland was the problem.

Changed the Batterymaster for an Ablemail Battery Maintainer, problem solved. The Ablemail has seperate stinings for Lithium and can be programed with your own settings if required.

Thank you very much Lenny! How do know all this stuff? Amazing!

I have ordered one and may be back with more questions if I struggle to fit or set it up!

 

[chippie]

Are you sure the hab door is powered by the leisure batteries, thought most hab doors were operated off the key fob which will be working off the start battery.
If it is operated off your lithiums as you state 40% would not cause the lock not to work, I had a similar intermittent fault and it was a bad connection on the contacts between door frame and door..worth checking out wiring or contacts on the hab door.

 

[Lenny HB]

Are you sure the hab door is powered by the leisure batteries, thought most hab doors were operated off the key fob which will be working off the start battery.
If it is operated off your lithiums as you state 40% would not cause the lock not to work, I had a similar intermittent fault and it was a bad connection on the contacts between door frame and door..worth checking out wiring or contacts on the hab door.

Read the last paragraph of OP post.

^{_{Subscribers  do not see these advertisements}}

 

[Abacist]

Are you sure the hab door is powered by the leisure batteries, thought most hab doors were operated off the key fob which will be working off the start battery.
If it is operated off your lithiums as you state 40% would not cause the lock not to work, I had a similar intermittent fault and it was a bad connection on the contacts between door frame and door..worth checking out wiring or contacts on the hab door.

The door will be operated by the Engine cab battery. To protect that from becoming exhausted by the alarm system, tracker and engine immobiliser, door locks etc I have a battery master which is supposed to trickle charge the cab battery from the hab batteries. Since fitting the lithiums it seems that the battery master is no longer up to the task.

 

[funflair]

Our habitation door runs from the habitation batteries, if yours is from the starter battery Robert and based on our lithium to starter via BM I would expect around 12.4v as the lithium’s drop, at that I would expect the door to still open but your experience suggests not,

 

[Carpmart]

My hab door runs from my habitation batteries too. Also has a pair of 9v PP3 batteries as back up if the hab battery voltage is too low.

FYI, I’ve had less than 20% charge on the hab batteries and the door solenoid fires perfectly still, so your issue is somewhat strange?

 

[CazPaul]

My habitation door operates from 2 sources.

1. My HAND on the handle.
2. A little silver thing called a KEY.

Progress eh.