Thread: Love this remote Bluetooth battery monitoring

Originally Posted by DiscoJeffster

As most of us know, for the battery management system to work effectively we connect the negative terminal of all accessories to the body earth.
How are these best connected? Directly to both the positive and negative or negative to the chassis?

The BM2 draws such an insignificant amount of current that it will not effect the BMS, so fitting it directly to the cranking battery’s terminals would be the best setup and would remove any erroneous voltage drop readings that would occur if the negative connection of the BM2 was made somewhere else, and if the cranking battery was low and being charged by the alternator.

Originally Posted by SeanC

Hang-on now.A roast?!! This type of glamping is fine if you have a Disco but if you drive a Deefer, well that’s just soft. Just stick with the dehydrated meals.

Er a little older these days.....no longer need to rough it, we do carry some dehydrated meals in the pack for over night walks.

Originally Posted by Ashes

I’ve got these on on Starter battery, Aux Battery and also have one across the house batteries in my caravan.
There is a app that allows you to monitor 4 of these at the same time.
The one in the van is particularly useful as I can see the charge history, when lowest voltage occurs and also can see the graph dip when my compressor fridge kicks in.

Hi Ahses, the 4 module app is idea for travelling with a van.

You can monitor the Cranking battery, Auxiliary battery, the House batteries, and most importantly, you can monitor the Breakaway battery, if one is fitted.

NOTE, the use of a BM2 to monitor the Breakaway Battery in NSW does not meet the Manditory requirements, but in all other states, it makes it easy to keep an eye on the Breakaway Battery while monitoring all the others.

The only downside to using something like this is that most people will not really understand what they are seeing. People need to get a basic idea of how batteries work, so they can get the best results from their BM2.

Originally Posted by BrianElloy

The graph shows the state of charge yesterday from parked/Idle, dipping when the car starts, rising to approx 14.5V when charging (driving) to pulse trickle charging on the CTEK.

Hope this helps some of you who deal with battery issues like me!

That is an interesting result as the graph shows your battery was near fully charged before you started driving.

It unfortunately it does not give any idea of how much battery capacity is actually available.

Originally Posted by weeds

Er a little older these days.....no longer need to rough it, we do carry some dehydrated meals in the pack for over night walks.

Nice Set-up.

I bought one of these this morning!!! Wasn't sure if it could work on two batteries at once. Suppose i will order another one now!!!! Good to know they are a good item, looking forward to having a play with it!!!

Anyone care to tell what range their Bluetooth 4 will connect to?
I'd love to put one on the van and check from the house.. maybe 50 feet, in direct line of sight though

I irregularly get connections made at 20m but it is more hit-n-miss at that distance and I usually make sure I am close enough to get a positive link.