time2roll wrote:
srschang wrote:
Hey 3 tons, I'm struggling with extended (weeks, months) with my 2 LiFePo4 batteries in my Northstar. I also have small parasitic draws that discharge the batteries over the course of several weeks. And I don't want to disconnect the batteries as my Pioneer stereo takes me 15 minutes with the manual to get demo mode off, dazzling display lights off, all four speakers working..... every time I disconnect it from the batteries.
I currently have a Progressive Dynamics 45A LiFePo4 converter. The problem with the PD LiFePo4 chargers is that they charge at 14.6v - all the time. So if I leave the camper plugged in, it will sit at 14.6v as long as it's plugged in. Bad for LiFePo4 batteries. I found that the WFCO 50A LiFePo4 replacement converter/charger section charges at 14.6v for 4 hours, then drops down to 13.6v as long as the camper stays plugged in. If the camper is unplugged and plugged back in, it will again charge at 14.6v for 4 hours, then drop to 13.6v until the camper is unplugged. Perfect for leaving it plugged in for extended lengths of time. Here's a link to an interview with the CEO of Battle Born batteries. His comments on long term battery storage start at 12:50. Comments specific to longterm float at 13.6 are at 14:30.
https://www.youtube.com/watch?v=ywn-vBjKblI
Scott
I believe the PD has a jumper to revert to the normal 3 stage charging. FAR better than the actual lithium profile.
Boondocker spends just 15 minutes at 14.6 volts and IMO much better than the 4 hour WFCO.
That’s good to be aware of! ...I not too familiar with Boondocker but note that for some LiFePo4’s 14.6v is at the BMS charge cut-off point - always best to first check the battery’s specs - just saying, “trust but verify” - lol
3 tons
