2016 YRDE stalls under load

[krzstruyk]

Hi all my cart has been running great and last night when I went to move it all was fine until I applied more than 50% throttle then you hear the motor sputter a little (with a small whine and it stalls)

If I flip the tow switch and back to run it will drive as long as I keep it under say 50% throttle (can drive around like this) but once you apply more throttle
It sputters and then stalls out

Any tips on what this may be I searched the forums and could not find a definite answer any help would be appreciated !

[golfcartg]

It sounds like you’re experiencing a voltage drop that’s causing your cart to cut out under higher throttle. A good way to confirm this is by measuring your battery pack’s voltage with a digital multimeter while driving. Set your DVM to measure DC voltage and make sure it’s rated to read above your pack’s maximum voltage. Attach the DVM to the main positive and negative terminals of the battery pack using alligator clips to keep it secure and hands free. This way, you’ll be able to monitor the pack voltage as you drive and specifically note any drop when you press the throttle past that 50% point where the sputtering and stalling occurs.

Watching the voltage under load like driving up hills will help you see if it dips suddenly at higher throttle levels which can point to issues like battery health, connection quality, or even motor or controller strain. When the battery pack is under load (like when accelerating), it naturally pulls more power, which is why it’s needed to keep an eye on the voltage at that moment. If the voltage dips significantly, it might indicate that your batteries are struggling to deliver the necessary current, especially if one or more cells are weaker.

Keeping your pack above a 50% state of charge (see attached chart) in resting voltage is also critical to avoid issues like this. For a typical 48V setup, this translates to around 48.4 volts or higher when the cart is at rest, or 36.4 volts for 36V setups. Dropping below 50% too often or letting the pack discharge too deeply can cause a range of performance issues, from reducing power output to eventually harming battery lifespan.

If you find that your pack is holding charge well under load but the problem persists, this could point more toward the controller, motor, or wiring connections, but voltage testing is a great first step.