Finally got me an Eagletree Data Logger!

[BrianG]

These loggers do log higher than their rating, but I strongly suspect they lose accuracy/linearity much beyond the rating. If you zoom in on a ~120A peak, you will probably see the slop estart to round off. That's not typical if you look at the peaks under the 100A rating. So, the real peaks are probably much higher than you think they are if you extrapolate the curve. Also, if you calculate cell resistance over various current draws, you will be able to get an idea of the real current and see if it matches the graph.

I've logged over 140A peaks on a CRT.5 using a Medusa 36-50-3300 on 3s geared fairly conservatively. So I imagine the peaks on the 8th scales are well into the 200-300A range.

Oh, and my 150A version uses 12GA wire from what I can tell.