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
BFL13 wrote:
"The PM3LK will always be 13.8 volt max on the 4 stage mode. Just got a Boondocker and it's 14.7, up from 14.6 on the 4 stage mode and has the adjustable lithium mode as well"
That is not correct.
The PM3-LKs have their three-stage mode and the adjustable voltage mode all in one unit. The boost voltage in the three-stage mode is 14.6v and it stays at that for 30 minutes from start -up.
bestconverters gets its "Boondocker" converters from PowerMax to specs as ordered by bestconverters. These specs may be different from PowerMax specs in some cases.
bestconverters seems to be selling their adjustable voltage models as "lithium" chargers. They changed the photo from the external knob pot recently to a photo of a standard old model (external fan, etc), but the above post suggests it is now an LK type with the internal fan and holes in the side for accessing the internal pot. Someday it might all get sorted out with everyone's website clear on what's what.
You can get the specs and operating instructions for the LK on the PowerMax website (use the "products" link first)
When I talked with them, they said the powermax units are changing to 13.8 as requested by OEM but the Boondocker aftermarket version was actually going up from 14.6 to 14.7 or maybe even 14.8 with a 2 hour bulk charge. They also mentioned the manual was incorrect and linked to this for the new PM graph Agree it's confusing.
