got to start commuting to work again. Did some repairs to my battery pack last weekend replacing a weak 1s10p subpack and re-welded some weak points with my new 2 cap welder. Added a scosche cap to my exisiting crap cap and the welds are much
better now. Charges to 16.5v in about 3-4 seconds. KA-ZAP! Good stuff.
Rode up my 1,670ft climb with the 9C & 9FET setup. Everything is pretty underpowered even compared to my old 4011 @ 84v, but it still did great... until
... about a mile from the top the voltage started to plummet. Was cruising along WOT at about 17-18mph up 8-9% grade at ~1200 watts & about 69-70 volts pedaling moderately as well when it started going south... 68v... 67v... 66v
... LVC trip... damn. WTF
?? Waited a minute until the voltage recovered a bit above LVC and limped up the last mile at 64-65v & 600-700 watts about 8-9mph & pedaling a lot
. At least there was only a mile or so left. Oye.
Got to the office and the 9c was... warmish.
Found the dud subpack easily as it was considerably hotter than the other packs. Was the last 1s10p in the pack on the negative output side. Grrr. Luckily I have 4-5 more subpacks ready to swap out, but I'm hoping this is the last weak one. I should have done more testing of these used konions instead of just trusting them. They still power me up mountains though even with duds so I can't complain too much.
A good commute... MapMyRide.com does a good job with mapping etc. Liking it.