Shunt mod gains
- Thread starter anon4
- Start date
You won't gain any more top speed, but you will improve hill climbing performance and the ability to maintain speed over undulating terrain. Don't expect miracles with a 13 amp rated controller though.
Best to add a small amount of solder, then test. Some controllers don't like it if you go too far with the solder.
Best to add a small amount of solder, then test. Some controllers don't like it if you go too far with the solder.
Doesn't matter, I already tried it and it went boom!
On closer inspection looks like a rogue blob dropped down and shorted the whole thing out, oops! I think 20 amp would trip the BMS. I only wanted to go like 15/16. Saying that some are configurable. I also need it to be pretty small. Have a basic spare without display that has thankfully fired up once I figured the wiring so at least I have power...Oops
New uprated controller is the way to go. Maybe 20 amp rated with your battery.
KT lcd3 and controller will set you back about £80.
You can buy the cheaper lcd1 or 2 but the 3 gives you more parameters to fiddle with and one of the important ones is controller amps, you can adjust them down ( approx. by 5 amps) to suit your needs so no worry if you get a 17 or 20a controller and don't need all them's amps.
You can buy the cheaper lcd1 or 2 but the 3 gives you more parameters to fiddle with and one of the important ones is controller amps, you can adjust them down ( approx. by 5 amps) to suit your needs so no worry if you get a 17 or 20a controller and don't need all them's amps.
I've just went for the same one because it's cheap and can take a 48v. If I decided to mod the shunt is there any way I can guard from this happening again? Something to catch any drip? More likely after this experience I'll just wait until I can get a 48v battery
Go easy on the solder use a thinner core solder, with the lid off and proper access try a bit of kitchen towel to prevent drips /splatter affecting other components or tracks. Add a bit try it/ride it & add more if needed to max of 25/30% of shunt, typically solder the rhs leg of the shunt on the v- away from the fets side of the controller.
Show a pic of the shunt you modded so we can see what/where went wrong.
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I've chucked it. Basically a bit dripped onto the base of the shunt that I didn't see and it shorted out against some tiny component that was under it, melting a hole though the board
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