I've used the 12V pack a few times, and encountered some heating issues.
One problem is the PWM unit, which although spec'd for 40A continuous, cannot dissipate the heat if operated above 30A for any period of time. I moved the PWM out of the pack and into a separate box with a cooling fan, but it's not enough. So I've ordered a 60A PWM, which should be able to handle the heat, and hopefully creates less. A nice side effect of moving the PWM is that my power meter works properly.
I also had a hot spot that damaged the main on/off switch (rated 50A). The plastic bed that holds the contacts overheated with the wire attached to one contact, causing it to deform so the switch could not make contact. I've used that switch for two years without problems, so I wonder if it was the wire or the connection that got hot. I replaced the switch with an identical one, and reused the connecting wire, but switched the ends, and made sure the connections were really tight. I'm keeping my eye on it.
Aside from these issues, I'm happy with the pack. I hope I'll get a chance to use it enough to actually drain down the battery. So far, sailing has been too good, and the sculling oar works too well. :)
Posted by: cpcanoesailor@yahoo.ca
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