RLS7201 wrote:
Every time I see a thread like this, I go give my 6 volt, wet cell, GC batteries a hug. No BMS. No DC to DC charge to protect my alternator. No worries about ambient temperature.
The draw back is having to check the water levels twice a year.
Sent from my flip phone.............
Richard
I use to feel the pretty much the same way about my sixers - that is until a twist of fate intervened - lol.
I got the opportunity (donated spare time and labor) to fully convert a friends V-nose cargo trailer into a ‘full fledged’ camper, with 400w of MPPT solar, Aims pure-sine pass-thru inverter-charger, air conditioner, Danfoss compressor refer, shower (50 gal fresh), and even a SCR rectifier-based diversion-load hot water heater…He insisted on going with a single 100a/h Aims LFP (later upgraded to two, and 800w solar…).
During the course of this build (which took about 3 or so mos), I was afforded (by being alone, :) he-he!) pretty much a cart blanc opportunity to assemble, test (actually torture test!!) this ‘weird’ LFP under all kinds of loads, incl. heavy inductive, and (relative to my two GC’s) it’s rapid harvest recovery…Ran the 11kbtu air conditioner a bunch, and on one occasion inadvertently noticed that the LFP had gotten to an amazing 6% SOC (per Victron BMV shunt meter), compressor running!…On another occasion I strung together a full 100’ extension cord to reach over to my garaged camper (from his LF 2500w Inverter) and it ran my air conditioner without a hitch!…After awhile it began to occur to me that for the most part SOC was pretty much a non-issue (due to a relatively flat voltage profile), and that a full charge was mostly unimportant and after this period of exposure, with many free-lance exhaustive trials (some covert!), I felt forced to cave and made the leap into ‘(or back to?) the future’ lol…
In closing, the best way I can relate the difference (via arguably, just analogy) is to say, similar to comparing grid power to GC battery power…I would also add that while a BMS may be a concern for some, charging is far simpler simply because (assuming solar?), staying anywhere’s within say the middle ground of SOC span is plenty good enough, and because of this, charging is much less frequent due to LFP’s far deeper depth of discharge and extent of usable SOC.
Either way, Just don’t ask me anything about pregnancy, because fortunately I’m unable to ever experience it - lol
3 tons
