dirtdad
1 kW
- Joined
- Mar 2, 2008
- Messages
- 309
Hi all
I have been selling Yesa batteries for a while now. They now make high discharge packs with 5C sustained / 8C burst rates. They make them in 10AH - 30AH, so the 30AH can do bursts of 240A, for example. These should be good for eTek applications, electric motorcycles or cars, or even big eBikes that use the X5 series motor that can handle those high amperages. Even on a smaller motor you will get the benefit of discharging way below the max rate and getting more cycles from the pack.
Or so Yesa says.
I can test them and Yesa can test them all day. But I dont expect anyone to take our word for it, and I don't want anyone to have to wait for someone else to be a guinea pig to see if these are for real. So here is what I am going to do.
I am sending a 48V 15AH pack out of my own stock (straight from Yesa, but I ponied up for it) to Doctor Bass at no cost to him. I will pay shipping both ways. I also added a single 10AH cell in hopes that the good Doctor wont take the pack apart (I can always hope). Doc will test the battery and the cell. He will post the results to this forum. He has no vested interest in the pack since he did not pay a Canadian dime for it. I want to make this as unbiased and credible as possible. Sort of like Consumer Reports (CR). Or as close to it as we can make it. Actually, CR buys their items on the open market to make sure the manufacturer does not rig the results. Yesa knows what is going on here, and they did test the pack first. But this test is as unbiased as I can make it, and way better than me hooking it up and taking a pic of my Cycle Analyst and saying how awesome it is, yada yada, yawn....
I do feel compelled to point out, in light of recent forum topics, that Yesa has delivered good warranty support to my customers. I have gotten replacement cells, BMSs and even complete packs as warranty replacements when needed. They deliver a steady stream of constantly improving product. They are not a small outfit waiting to receive their first order for 100 batteries before the even start putting out product. Yesa is planning a new factory in 2009 and plans to make other chemistries and a wider range of rates. I hope everyone appreciates our efforts to get the product evaluated by someone other than ourselves.
One last thing. Would anyone else be interested in a "try and buy" deal with the battery after Doc is done with it? I cannot afford to send it to anyone else for free. But I could do like a rental, where 100% of the rental would apply to the purchase, all the prices would be agreed to ahead of time. You can be sure the pack is solid, the factory tested it well. I am not sure it would make sense for anyone, but I thought I would at lease offer that option.
I have been selling Yesa batteries for a while now. They now make high discharge packs with 5C sustained / 8C burst rates. They make them in 10AH - 30AH, so the 30AH can do bursts of 240A, for example. These should be good for eTek applications, electric motorcycles or cars, or even big eBikes that use the X5 series motor that can handle those high amperages. Even on a smaller motor you will get the benefit of discharging way below the max rate and getting more cycles from the pack.
Or so Yesa says.
I can test them and Yesa can test them all day. But I dont expect anyone to take our word for it, and I don't want anyone to have to wait for someone else to be a guinea pig to see if these are for real. So here is what I am going to do.
I am sending a 48V 15AH pack out of my own stock (straight from Yesa, but I ponied up for it) to Doctor Bass at no cost to him. I will pay shipping both ways. I also added a single 10AH cell in hopes that the good Doctor wont take the pack apart (I can always hope). Doc will test the battery and the cell. He will post the results to this forum. He has no vested interest in the pack since he did not pay a Canadian dime for it. I want to make this as unbiased and credible as possible. Sort of like Consumer Reports (CR). Or as close to it as we can make it. Actually, CR buys their items on the open market to make sure the manufacturer does not rig the results. Yesa knows what is going on here, and they did test the pack first. But this test is as unbiased as I can make it, and way better than me hooking it up and taking a pic of my Cycle Analyst and saying how awesome it is, yada yada, yawn....
I do feel compelled to point out, in light of recent forum topics, that Yesa has delivered good warranty support to my customers. I have gotten replacement cells, BMSs and even complete packs as warranty replacements when needed. They deliver a steady stream of constantly improving product. They are not a small outfit waiting to receive their first order for 100 batteries before the even start putting out product. Yesa is planning a new factory in 2009 and plans to make other chemistries and a wider range of rates. I hope everyone appreciates our efforts to get the product evaluated by someone other than ourselves.
One last thing. Would anyone else be interested in a "try and buy" deal with the battery after Doc is done with it? I cannot afford to send it to anyone else for free. But I could do like a rental, where 100% of the rental would apply to the purchase, all the prices would be agreed to ahead of time. You can be sure the pack is solid, the factory tested it well. I am not sure it would make sense for anyone, but I thought I would at lease offer that option.
The construction seems nice hand made with white plastic covers assembleds with a 50A connector similar to Anderson connector for the output. They supply the wired plug to match it with 10AWG wires (4mm sqrt cooper)
