You can get a program card for that ESC which allows you to easily set the low-voltage cut-off and reverse!

What's the new ESC because unless you set the cut-off on that you will have the same problem!

The last time I was out driving and testing my SEA Commander, it suddenly stopped running.

No slowing down or advance warning it just stopped - when out on the water.

All other ESC that I have used in my boats for brushless motor control cut power at a pre-determined cell voltage to protect the battery.

Often, following the power cut the ESC will re-set to allow you to limp back to shore with the boat ready to have another fresh battery fitted to replace the safely discharged one that is in the boat….not this one, it just stopped.

I connected another battery and the ESC worked normally, which I found a little puzzling.

The LiPo was a 2C 7600 Overlander LiPo.

When I connected the LiPo to my Overlander DC-100 charger it gave the “fuel level” as zero!

The battery was completely exhausted.

I always balance charge these LiPo batteries at 2.5 amps, not too fast, but not too slow either.

Fearing that I had just destroyed my LiPo by allowing it to drop below its residual value I pressed the “go” button in any case - nothing to loose!

The charge rate automatically dropped itself to 0.1 amps and very slowly began to increase just before the charger “timed-out”.

I started a fresh (second) balance charge and the LiPo now began to accept a charge at the requested 2.5 amps!

This second charge continued until the charger stopped the cycle and recorded “battery full”.

I am not too happy to run this air cooled (with integrated fan) Surpass 120A ESC again unless I can find a way to programme it to protect the LiPo’s from dropping below their residual safe voltage.

The paperwork that came with the Surpass 120A ESC is at home, so until then I may give my new water-cooled ESC its first run.

As for the LiPo, we will have to see if it can still deliver the power as it has always done, but if it does I will be very pleased - but surprised !

Does anyone else have an experience to share about using this Surpass 120A ESC?

Bob.