Lithium Batteries

msmith1199 wrote:
Not being an electrician I don’t completely understand your question. Are you asking about the existing Converter in the motorhome? If so it’s a PD4560 by Progressive Dynamics. It’s basically the entire 110 volt and 12 volt electrical panel all in one with the converter built into the panel. The one I have has the switch to turn it to Lithium mode. Per their website having that switch is an option. So luckily for me Nexus ordered the panels with that option. So I’m good for charging the batteries with the generator or when I’ve got 110 power. But I have a residential fridge so I want the batteries to charge from the alternator too because on long drives there will always be a draw on them otherwise. I understand it may not fully charge the batteries, but as long as it keeps them going.

So I went to the PD site but did not see any algo specifics on the 4560

https://www.progressivedyn.com/lithium-battery-power-centers/

When PD ‘suggest’ they’ve worked with several LiFePo4 manufacturers, this simply means that they’ve decided on a constant ON 14.4v charge methodology (with no programmability, the easy way out $$), but understand that Li’s don’t like to be stored for an extended period in this way - in fact, in some of their other chargers 14.4v is stated to be an equalization mode (i.e. every 21hrs/15 min for lead acid batts).

So I’ll just assume the 4560 has the same algo as their Li 9100-L series which simply remains at a constant 14.4v throughout the entire charge and never shuts down - ordinarily not an ideal plan IF left continuously on, but since you have a compressor refer (duty cycle enters the pic) I would think that this concern becomes a lesser issue...JMO

My main grievance with these ‘so called’ LiFePo4 chargers is their lack of programmability, thus I just stayed with my 9245 (with charge wizard in 14.4v boost) and (when on shore power) just added a simple battery post disconnect to prevent extended charging....

3 tons