Voltage drop

[Gallachera89]

48v, what should the full pack drop to under full throttle from a dead stop?

[Gallachera89]

Batteries read as followed from positive terminal to negative terminal
Pack started at 51.4
6.44 6.43 6.44 6.40 6.41 6.47 6.44 6.45
took it around the block up 3 hills (1 mile ish)
first slight grade was 48.1 uphill
big hill was 47.3
3rd was 48.2
and coming back down the first hil was 48.7
pull cart in drive way and metered batteries in the same order
6.35 6.37 6.37 6.33 6.34 6.40 6.38 6.37
First full throttle take off pack dropped to about 43

sound about right ?

[WalterM6]

Sounds good to me. On the hill were I do my measuring my voltage drops to 46V. I've seen it drop as low as 41 but it was 30 degrees outside. Remember those voltages and if you ever have any doubts about your batteries redo the test and compare readings. They should remain fairly close,at close to the same temps.