Good Sam Club Open Roads Forum: Converter starts/runs for a few seconds then stops
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Converter starts/runs for a few seconds then stops

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev
time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 02/04/21 12:03pm Link  |  Quote  |  Print  |  Notify Moderator

ivbinconned wrote:

The Dynamic line up does not have one that does both acid and lithium.
Progressive Dynamics does have a "Lithium" converter and some have a "Lithium" jumper to change the charging pattern. However all this does is to lock the converter into the 14.6 charging mode continuously. This is not recommended by lithium battery manufacturers. You would have to charge and then disconnect. Fine if you use a generator and are present while charging finishes. Not so good to just plug in and go out for the day.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

ivbinconned

highway 16

Senior Member

Joined: 09/27/2003

View Profile



Posted: 02/05/21 08:33am Link  |  Quote  |  Print  |  Notify Moderator

So am I to conclude that one must go all in. If I want to go lithium then get lithium converter. If not then normal basic converter?


Ram and 34 ft Cedar Creek

BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 02/05/21 09:54am Link  |  Quote  |  Print  |  Notify Moderator

ivbinconned wrote:

So am I to conclude that one must go all in. If I want to go lithium then get lithium converter. If not then normal basic converter?


No. Any charger or converter that does 14.4-14.6 will do and you can put a timer on the 120v side if you will be away and set it to float when you get back.

Guys use their charge wizard with the PD converter which makes it do 14.4v for four hours then it drops to 13.6. Same drill as for Wet Batts.

The PowerMax LK model converters can be set to 14.x and there it stays till you change it, so that would need a timer if you will be away when and after the LFP BMS finishes its balance routine. You then set it to 13.6 or just not do a float. It also has a regular three stage automatic, but the time at 14.6 is 1/2 hour, so not enough time for getting a bank to full before it drops to Float.

Best thing would be a portable battery charger with amp choices and batt type choices. If the LFP is under 41F, you must charge it at fewer amps, but your converter is only one amps "size". Portable chargers can be set to 10/20/40 amps and you can pick AGM for 14.4v instead of Wet at 14.8 volts so you can use the Gel for the LFP.

It is bogus to say you need a special charger for LFP. Seems to be a thing that LFP salesmen say to extract more money from you than they got already for the LFPs! [emoticon]


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
Photo in Profile
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas
See Profile for Electronic set-ups for 1. and 2.

SV K

Varied

New Member

Joined: 12/01/2020

View Profile



Good Sam RV Club Member


Posted: 02/06/21 06:29am Link  |  Quote  |  Print  |  Notify Moderator

Good info here and sensible approach to manage LFP’s with “conventional” chargers.

Just wanted to add that unless you need those few extra amps there is no reason to fill the LFP to the top. That is one of their benefits, it is fine to partially fill an LFP. In fact, not taking them to 100% SOC will extend the charge cycles beyond their ratings. Nor do they require “X” voltage to charge. Set my controller to 13.8v yesterday and the LFP was very close to, if not full, by the time the charging stopped.

After 7yrs. of using lithium I now view them as similar to a water tank. Doesn’t matter how fast or slow you fill them, nor how full it is as long as there is water in the tank you’ll be happy.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev

Open Roads Forum  >  Tech Issues

 > Converter starts/runs for a few seconds then stops
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.