otrfun wrote:
StirCrazy wrote:
I think part of that is they were waiting for a consensus of what would be good for a second voltage on a two stage and to see which format (chemical composition) was going to become the leader for rv use. There are some companies that came out with 2 stages right off the bat.
I'm a bit surprised any reputable converter/charger manufacturer would produce a single-stage 14.6v lifepo4 converter/charger.
The converter/charger industry transitioned from single-stage to multi-stage converters/chargers for lead-cell batteries many, many years ago.
Lead-cell and lifepo4 chemistries share the same, exact charging dilemma. There is no one, ideal charge voltage for lead-cell. There is no one, ideal charge voltage for lifepo4.
Why some converter/charger manufacturers completely ignored this simple concept by introducing single-stage (single voltage) lifepo4 converters/chargers for lifepo4's is beyond me.
wasn't just some, they all did single stage Li output for a bit, some went to dual stage quicker than others.. don't forget LiFePO4 isn't the original LI that the converters were intended for so the second stay wasnt considered necessary as the one voltage would cover the two or three types of Li out there. now that LFP has emerged as the most usual format you are seeing all the two stages coming out at around 14.6 and 13.6. Now would I buy a 2 stage... for me I don't know if it makes any sense. I use my BMS to control my charge so it would charge to the voltage I have set and then shut off the charge so the 2nd stage would never really come into play anyways. all the modern electronics, led or florescent lights will handle a 14.6V no issues. so for me I am not quite sure it makes sense, unless you can think of something I am missing. but for someone who is buying off the shelf batteries and cannot control the charging cut in and outs then ya a 2 stage is great as it will hit 14.6, do its balance thing, then drop off to 13.6 or whatever the second stage is.