Current from stock Wilderness 12 AH pack?

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dirtdad   100 W

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Current from stock Wilderness 12 AH pack?

Post by dirtdad » Apr 03 2008 3:49pm

Regarding the standard 36V 12 AH pack from Wilderness Energy:

Does anyone know what the pack is rated for discharge, C?

AND if you have it wired to a BL36 motor and an amp meter, what current draw range do you see (yes, current, amps)?

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Rassy   1 MW

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Re: Current from stock Wilderness 12 AH pack?

Post by Rassy » Apr 03 2008 11:31pm

dirtdad wrote:
Does anyone know what the pack is rated for discharge, C?
When I purchased my WE BD36's about a year and a half ago, their brushed controllers went to 35 amps. Their standard battery was only 7 AH, so they were expecting it to suppply 5C. However, they were selling all their kits with the 12 AH pack "free", which would have been required to supply 3C. I expect the 7 AH packs weren't up to the task.

Anyway, I have verified the 35 amp draw during startup and hill climbing, using an inline automotive ammeter. All my batteries are still strong, but my normal daily rides are pretty short and the batteries are always promptly recharged.

Edit: Hey, its late and I already had to correct two numbers above. Hope it makes sense. My conclusion is you might get away with 5C, and will be okay with 3C. Of course the sag increases as your draw goes up.
-Rassy-
One Tadpole Trike equipped with a Bafang BBS02
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One Delta Trike equipped with a Bafang BBS02
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Eric G   1 kW

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Re: Current from stock Wilderness 12 AH pack?

Post by Eric G » Apr 04 2008 9:32am

Yep I agree with Rassy,keeping sla discharge at around 3 C.
I'm using a brushed Crystalyte with a 25 amp controller and 36v/7.2ah sla.Using a Watts Up meter it shows I draw 26 amps or 3.6c from the batteries at startup,pedaling reduces this.When up to speed and cruising along it's much less.My batteries are a year old now and still have alot of pep in them.The less current you draw from the batteries the better the range and battery life.

Eric
600 watt Brushed Clyte/20in.wheel/36v7.2ah sla /25amp controller/34kmh. on level ground
http://endless-sphere.com/forums/viewtopic.php?t=2558

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