dirtdad
1 kW
- Joined
- Mar 2, 2008
- Messages
- 309
I just took delivery of the newest packs from Yesa. I am trying my best not to shill here, just posting relevant tech data.
Yesas have been unavailable for a while being updated. The new packs feature an increased discharge rate, 1C sustained, peak discharge of 2C, bms cutoff kicks in at 3C. The old numbers were .5C sustained, 1.5 peak, and 3C cutoff. Of course you can run any rate below the cutoff it just affects battery life. The sustained numbers will give you 1000-3000 cycles. They also have nicer charger connectors and an updated BMS that includes a large external capacitor seen in the picture. It can be removed if needed for space considerations. They still come with 3A chargers and can be charge to 90% in about an hour. I am still testing this claim. These fill a gap in the range of Lifepo4 offerings. I see the hierarchy being something like this in terms of $/specs, from bottom up: duct tape, Yesa, Lifebatt, A123. There are other batteries, I know, but I think that lays things out well.
I have been using two of the previous generations 36V 10AH in series for a while now. These use very sturdy cells and thus are very sturdy packs. And they do indeed handle series/parallel discharge very nicely.
Yesas have been unavailable for a while being updated. The new packs feature an increased discharge rate, 1C sustained, peak discharge of 2C, bms cutoff kicks in at 3C. The old numbers were .5C sustained, 1.5 peak, and 3C cutoff. Of course you can run any rate below the cutoff it just affects battery life. The sustained numbers will give you 1000-3000 cycles. They also have nicer charger connectors and an updated BMS that includes a large external capacitor seen in the picture. It can be removed if needed for space considerations. They still come with 3A chargers and can be charge to 90% in about an hour. I am still testing this claim. These fill a gap in the range of Lifepo4 offerings. I see the hierarchy being something like this in terms of $/specs, from bottom up: duct tape, Yesa, Lifebatt, A123. There are other batteries, I know, but I think that lays things out well.
I have been using two of the previous generations 36V 10AH in series for a while now. These use very sturdy cells and thus are very sturdy packs. And they do indeed handle series/parallel discharge very nicely.
