Battle Born Lithium

Itinerant1 wrote:
Uhmmm usable...just the other day making coffee using the Mr. coffee 12cup and then run the microwave 4 minutes making breakfast at 30% SOC before the sun hits the panels. Roughing it off the beaten trail. ;)

Edit: I suppose a little data needed.
Before microwave use,
31% SOC, lfp pack 13.06v,inverting 12.9v (@ 9a)

Tail end of 4 min microwave use,
30% SOC, lfp pack 12.66v, inverting 12.4v (@ 148a)

1 minute after microwave finished,
30% SOC, lfp pack 12.99v, inverting 12.8v (@ 9a)

I set the inverter for 12.0v disconnect.

Glad to hear of your experiences!

After a couple of recent off-grid camping excursions, I can certainly validate your findings, in fact on just our last trip we departed home at only 48% SOC, camped overnight at Mono Lake for two nights and departed somewhere in the mid 30% SOC range, all along with minimal camp sight harvest due to heavy Aspen tree shadowing.... Hook-ups were available, but based on our previous trials I purposefully avoided hook-ups in order to gain some additional ‘real world’ LiFePo4 operating experience....I’m a coffee addict, so at least half a dozen Kurig brews, occasional brief MW, and colder autumn nights furnace ops, all without a single inverter alarm...

Thus, based on our own typical camp style, the former critical concepts of ‘usable amps’ and the departing at 100% SOC is beginning to seem a bit irrelevant...Kinda like a portable Li impact driver, tons of TORQUE throughout the job, even the middle range - right up and until (without any warning...) the tool SUDDENLY dies...

Quite naturally this kind of performance can come at a significant up-charge, and cold WX charging must be considered (this, why I mounted our 200a/h within the campers cozy interior), but when off-grid in the lower 48, solar harvesting can often be postponed to begin at around noon time...

3 tons