I was with you till .22c then you lost me with what ever you're trying to say after that.
It's only 4 years now living off of them everyday, maybe running the generator a dozen times a year for hold over charges. Solar does fine job getting the voltage where it needs to be to charge 3.52+ vpc capacity reset. Even this time of the year the solar is producing 3-5 Kwh daily.
You do not need to push high voltage, high current to charge cells go back and look at the chart I posted.
If the capacity was off like you think it is I would think inverting 235a load at 37% SOC might show a problem. The CPU does fine job keeping track.
It's only 4 years now living off of them everyday, maybe running the generator a dozen times a year for hold over charges. Solar does fine job getting the voltage where it needs to be to charge 3.52+ vpc capacity reset. Even this time of the year the solar is producing 3-5 Kwh daily.
You do not need to push high voltage, high current to charge cells go back and look at the chart I posted.
If the capacity was off like you think it is I would think inverting 235a load at 37% SOC might show a problem. The CPU does fine job keeping track.
BFL13 wrote:Itinerant1 wrote:
Those setting are basically for all lfp batteries not just BB. Depends on the voltage needed for balancing cells.
I've been using Bulk 14.1v, 14.2v absorb (10 minutes), float 13.6v for almost 4 years now with everyday use.
You have posted that the Absorption Stage for Li does not start till at a high SOC compared with Wets and AGMs.
The BB advice keeps referring to a full charge, but there is also talk of only operating at 80% and under. So when saying they want a charge rate of half AH capacity (which is a lot) or less, and an Absorption time of 20-30 minutes to get to full, does that compute?
IE will that "extra" half hour at 14.4 once amps start to taper get you to full?
Your 10 minutes would then get you from whatever SOC Bulk ends at (95%?) to part way closer to full, but this is still way over 80%?
It is hard to figure out what the "rules of thumb" really are for
1.when camping and
2. for getting to true full and
3. when you should go to full and not stay in the operating zone of SOCs.
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"Here are our (BB's) charging parameters for our batteries:
Bulk/absorb 14.2 โ 14.6 Volts(14.4 is great)
float 13.6 Volts or lower
No equalization(or set it to 14.4v), no temperature compensation and absorption time is 20-30 minutes per battery(if its an option)."
It's overcast here in AZ today with rain in the forecast this afternoon and for the next 3 days. I hooked up the eu2200i generator and set the incoming AC to 13 amps, 120Vac/ 60Hz was constant the entire time. The generator was not in echo mode at any point. There was a some help from solar but not whole lot.
I recorded the times in 15 minutes increments until 10:00 then recorded the readings at capacity % changes which you can see voltage/ current starts to change pretty fast.
The voltage readings don't match exactly, the CPU/EMS use xx.xx voltage and the Magnum uses xx.x voltage
Hopefully this isn't to confusing, orange colored area is generator time, blue is solar after generator.
The Magnum columns labeled inverting would be charging while the generator is hooked but inverting after solar takes over. I use this excel sheet to record the system over time.
These are the displays I get readings from.
