Heavy Duty MOSFET Regulator Relocation Upgrade RMS020-103779 for Polaris

Polaris RZR 900 and 1000, ACE, Sportsman and Ranger, 2012-2025

This is a heavy duty MOSFET voltage rectifier regulator relocation upgrade, part number RMS020-103779, for Polaris RZR 900 and 1000, ACE, Sportsman and Ranger machines from 2012 to 2025. It replaces the OEM diode-style regulator and, thanks to the supplied relocation harness, lets you move the unit out of the driver-side rear wheel well and into the front underhood area, away from heat and away from the mud and debris thrown up by the rear wheel. All products ship tested.

MOSFET technology is the reason for the upgrade. The unit runs much cooler than the traditional shunt voltage regulator rectifier, puts less load on the stator so less work is done and less fuel is used, delivers steadier power to the battery, extends battery life and frees up engine power by optimising delivery - switching the stator coils on or off rather than dumping excess energy as heat. It also has built-in overheat protection: rather than burning out, the unit shuts itself off temporarily to cool down. Installation runs to six main steps: remove the original regulator and its bracket from the driver-side rear wheel well; disconnect the battery and stator connections; fit the relocation harness; route the harness forward through the driveshaft tunnel; mount the regulator in the front underhood area using the original bracket; and reassemble. Position the regulator away from heat sources and debris. Before fitting, check the AC output of the stator, replace any burned connectors, repair melted wiring and use hi-temp dielectric grease. Battery condition is important - no regulator can make up for a bad or weak battery, so always start with a fully charged battery.