Battery Upgrade
First let me set the stage. We boondock 1-2 weeks a year. The rest of the time the trailer is plugged into shore power either in storage or at campground with hookups. We have one house GP27 wet ce...
Forum Discussion
peirek wrote:
Ahhh ...... direct replacement. Thanks.
Step 8 insinuates it will run in bulk mode (14.6v) for only 30 minutes. This leads me to believe it does not have any smarts but instead has a fixed bulk mode run time ( no monitoring of battery). Pure speculation but don’t find anything to the contrary.
That is in the 3-stage mode. If 30 minutes isn't enough time, switch to single stage, set 14.8 or whatever and it stays there as long as you like, then dial in some other voltage. See para 10 here:
http://powermaxconverters.com/wp-content/uploads/2018/05/PM3-12V-LK-Manual-2018.pdf
You do need a little screwdriver to adjust the pot and perhaps a flashlight to see what you are doing. Might have to get down to floor level to do that depending on where it is in the RV.
I like the older model with the big knob on top for adjusting the pot, but that would not work as a lower portion. Also the external knob ones cost way more.
I think all these newer LKs are on Amazon, but you can call Errin at PowerMax HQ and find out where you can buy one if not. Their dealers are still mostly selling off their old ones first.
Be sure to get an LK--you might order an older type MBA by mistake.
The pictures in the ads don't always show the right model. LKs have their fans inside, eg, so you can spot an older type from that.
https://www.amazon.com/PowerMax-PM3-55MBALK-Smart-Battery-Charger/dp/B01MT6H1RV/ref=sr_1_82?ie=UTF8&qid=1530313760&sr=8-82&keywords=PowerMax+converters
