This is a place for the discussion of the 60v rule. The only way we’re doing this is if we can do it safetly and within specifications of the fuses.
Our current BF1 fuses will run up to 58v nomianal
13s (54.6v, fully charged) still fits within the limits
14s, fully charged at 58.8v would be within the “close enough” range, but the lowest fuse amperage in the series is 30A… at that, we’re 22% higher than the “1440w” target.
“60v” scooter battery, fully charged at 16s is 67.2v… meaning that even its nomininal voltage of 60.8v, we’d need to find a ~23A fuse that will handle the fully charged voltages.
Fuse requirements, if you find something for 60v series…
- Must be bolt-down configuration, no blade-fuse types (ATO Style). Ideally, would fit in current holders.
- Must be of a similar trip-curve to the BF1 or the MIDI series fuses we have now.
- Needs to be cheap.
- If your team is planning to run one, you must provide spares to the race officials before the weekend begins.
Mike’s hot take time
Another option I’d consider (with the remainder of the PRS board agreeing to it) is bumping up 14s to the 30A fuse, and basing all new fuse ratings on that, since there are so few people running non-lithium chemistries now, it may make the most sense to get everyone on the BF1 fuse.
This would put all karts at ~1600w limits using nominal voltages, a roughly 15% increse in overall power.
End hot take
Please discuss below. I want to close this in no more than 1 week’s time, so next monday, 2023-04-10 is your last day to comment/discuss. Thanks for all your input!