complete build, good setup? questions
hey I have done lots of reading and phone calls, and decided to go with viltron Lifepo4 batteries if I can get a bulk deal on them. also, if the 15% off coupon I have is still valid. if not, I w...
Forum Discussion
Almot wrote:
Itinerant - don't be sorry, I don't view this as a hijacking. Li is a new technology, manufacturers are not very helpful, not much info on their sites. 30-90% is the way to go. 40-60% when in prolonged storage without cycling.
It sounds like Magnum has very informative display and critical point protection, but keeping Li batts in 30-90 is still left to users, i.e. keeping an eye on it.
Other than the readings I record off of the displays it truly has been a set it and forget system. System being the key word.
Having programmable charging sources is much better.
I agree when looking at mfgs web sites they are lite on indepth info other than generic answers of 14.4-14.6 should work or agm settings are alright.
It seems that the drop in batteries need the 14.4 -.6 for their bms to reset SoC/ cell balance. A lower 14.0-14.2v for would be better for longevity without pushing the knee.
The elite GBS that I'm using stays pretty accurate as far as SoC over the past 27 months.
I emailed them about required voltage for accuracy and this was their response.
"The EMS system has a minimum recorded resolution of +/- 0.5A so any current below that level is not accounted for. The system could be setup for a finer resolution, but the shunt value would have to be reduced which reduces the systems maximum current capability.
The system will reset the capacity to 100% whenever the pack voltage reaches 3.49 to 3.52 V/cell on average, depending on how it was programmed, and the pack current must be negative (charging) and typically under 35A and then it will set the capacity to 100%. Again, these are all firmware variables so it's possible your system was programmed differently. You should continue charging after this point until the battery truly is full to have the reference point of 100% be correct.
If you have many small loads that are not accounted for then you would occasionally need to re-sync the pack with 100%. The frequency at which you have to do this will vary depending on your application and usage."
Regards,
Rick Suiter
Elite Power Solutions LLC
