What needs to be replaced when upgrading from 72V to 84V?
2 Answers
When upgrading from 72V to 84V, many components need to be replaced together, such as electrical equipment, chargers, controllers, etc. Here are some considerations for vehicle modification: Choose accessories wisely: Don't blindly pursue the most expensive accessories. Accessories should be selected based on the actual condition of the vehicle. Avoid excessive sound insulation: Do not overemphasize sound insulation. If the driver cannot hear sounds from the road and the powertrain, they will be unable to obtain information about road and vehicle conditions, which can affect driving safety. Avoid excessive visual modifications: Do not blindly pursue visual effects. Installing large-diameter exhaust pipes or adding spoilers for appearance may not be meaningful for small-displacement vehicles. Moreover, it could potentially cause significant harm to both the vehicle and the driver.
I've done quite a bit of electric vehicle modification, and upgrading from 72v to 84v isn't as simple as swapping a few parts. You need to replace the entire battery pack with an 84v one, otherwise the voltage mismatch will prevent startup. The controller must also be replaced, as the original 72v controller can't handle the higher voltage and may easily blow fuses or even cause electrical failures. The charger must be upgraded to support 84v, otherwise the battery won't charge fully and it could be dangerous. The wiring system also needs inspection, as higher voltage may cause old wires to overheat or leak electricity—it's recommended to rewire and use thicker cables. After modification, performance and acceleration improve noticeably, but power consumption increases and range shortens. Before daily use, multiple tests should be conducted to ensure stability. Additionally, the motor should be evaluated for compatibility with higher voltage driving, otherwise efficiency may drop and wear may accelerate. Overall, this requires professional expertise, so it's best to seek help from a reputable shop for tuning to avoid unnecessary trouble.
