200 amp-hour Li $799

Tom/Barb wrote:
If you have room?? gofer it... they are big batteries.

Yes, they are.

Four generic 200ah 3.2v prismatic cells (4s configuration = 200ah at 12.8v) and a 120a-200a BMS (Overkill, Daly, etc.) would take up 1/2 the space of this unit at easily the same or lower price and provide 120a - 200a of continuous current (BMS dependent).

This particular $799 200ah Ampere Time LifePo4 is only capable of producing 100a of continuous current. If you have plans to power a microwave or similar device, you may come up a bit short.

Ivylog wrote:
I recently built 600AH of Lithium batteries for $1200 and my time… probably 10 hours and not that hard.

Nice! Source? Configuration? BMS?

otrfun wrote:
This particular $799 200ah Ampere Time LifePo4 is only capable of producing 100a of continuous current. If you have plans to power a microwave or similar device, you may come up a bit short.

Oops.

2oldman wrote:

otrfun wrote:
This particular $799 200ah Ampere Time LifePo4 is only capable of producing 100a of continuous current. If you have plans to power a microwave or similar device, you may come up a bit short.

Oops.

FWIW, the $979 ($50 off right now) 200ah Ampere Time LifePo4 "PLUS" version you asked about earlier is rated at 200+a of continuous current. This unit weighs ~6 lbs. more than the $799 (currently $40 off) 200ah unit, but has the same dimensions. Possibly the same cells as the $799 unit. No doubt more capable BMS and cabling.

Because of the weight difference, my WAG is that one has pouch cells and the other cylindrical…Either way, for my moola I’d avoid the 100a version.

3 tons

That is what I paid for 105 ah LION batteries at Costco. They have 150 amp draw.

2oldman wrote:

otrfun wrote:
This particular $799 200ah Ampere Time LifePo4 is only capable of producing 100a of continuous current. If you have plans to power a microwave or similar device, you may come up a bit short.

Oops.

Strange as the advert suggests 280amp Max.

So reading their reviews the BMS is a complete PoS. No low voltage cutoff, no low temp charge protection, etc. If you're going to monitor it closely or have a smart system upstream that can monitor and protect it then go for it, but as a throw it on the tongue and forget about it solution it's a complete fail, you'll most likely end up roaching the cells about as fast as a lead acid for 3x the cost.

pianotuna wrote:

2oldman wrote:

otrfun wrote:
This particular $799 200ah Ampere Time LifePo4 is only capable of producing 100a of continuous current. If you have plans to power a microwave or similar device, you may come up a bit short.

Oops.

Strange as the advert suggests 280amp Max.

Yes, 280a. But, for only 5 seconds.

afidel wrote:
So reading their reviews the BMS is a complete PoS. No low voltage cutoff, no low temp charge protection, etc. If you're going to monitor it closely or have a smart system upstream that can monitor and protect it then go for it, but as a throw it on the tongue and forget about it solution it's a complete fail, you'll most likely end up roaching the cells about as fast as a lead acid for 3x the cost.

Good point. Many of these budget LifePo4’s use sub-par BMS’s with terrible (sometimes non-existent) protection parameters and undersized internal cabling. Not so obvious is the probable use of lower grade cells.