Suggestions for monitoring a dual-battery system in trailer

[loren85022]

I'm finally adding a 12v refrigerator to our trailer. Thus far I had plenty of juice from my two batteries to run a water pump and a few LED lights for 7 nights. I better pay better attention now and am curious what people are using to stay on top of the consumption.

I'm looking at the National Luna Dual Monitor as an option. Seems pretty simple.

Thanks,

 

[BrianTN]

Can't help with monitoring in a trailer, but I have that monitor in my truck. Overall I am happy with it and it is simple to setup, but the connector for the monitor itself is very loose. If the cord is bumped the battery voltages jump around and it sounds the alarm for a second. I emailed NL about it but received no reply.

 

[loren85022]

For the price, I cant find anything better. Thanks.

 

[bunger]

Not on my trailer but on my truck I have this.
http://www.sierraexpeditions.com/index.php?l=product_detail&p=2074

I originally was going for a National Luna but found they had availability issues in the USA at the time.
The IBS has been in my vehicle for 2 years now and I am very happy with it.