Though I haven't got that many cycles on lipo, and am still a noob, I'm coming to the conclusion that just watching the CA may be enough provided you have a full charge. One nice thing about the Imax lipo chargers I have is they really do tell me, at cell level, that the pack is fully charged and balanced.
Once you know that, you don't need to watch em too much. All my 8 packs seem to be discharging very evenly. Just keeping an eye on total AH on the CA and total voltage on the CA seems to be all the info I really need, unless I'm trying to get someplace on the last watt. The real need for cell level monitoring is to guard against a cell that never charged going low before the others. Knowing for a fact that the packs are full charged and balanced is a huge step in the right direction. Regular chargers give you a green light that means either A, you are fully charged. Or B, you never charged and have a bad plug. And you ride off with situation B partially charged at best.
I'm running the buzzers, that are telling me when the voltage of the paralelled pack reaches 3.75v average. They really start chirping at 3.5v. I did confirm that they all were popping off at the same voltages more or less. They only read pack voltage, not cell level. So my pack is monitored at 5s. The only way I know the cell level voltages is the charger told me that later.
I'm quite tempted to just have one of the buzzers hooked up, and assume the other 3 are close to the same. So far it has been. As the pack ages, no doubt it will need more monitoring.
Yes, it will be interesting to see if any of the wires or connections heat up. If any do, then I have to start over with 8 guage wire everywhere, and higher amp connectors. If that is needed, then I may permanently parallell some packs to minimize the number of plugs, and go to 5mm bullets. A short run this morning, since half the pack is not broken in yet, didn't heat up anything noticeably. I know I need to upsize to run more than 45 amps.
It was fun to pass a car going 35 mph though.
And get the look
2700 watts is fun!