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A dual-battery installation is platform-specific: the tray, cable routing and auxiliary-battery size that work on one RZR may not fit another. Confirm the exact RZR model and year against the listing. The complete kits below include an isolator or battery option; the final components are deliberately labelled near-misses for builders completing a compatible system. A second battery is not included unless stated, and an isolator’s rating is not a substitute for correctly fused, manufacturer-approved wiring.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Polaris Secondary Battery Install Kit 2884347 | $90-$100 | Amazon · eBay |
| 2 | Polaris 12V 30Ah AGM Auxiliary Battery 4014609 | $180-$210 | Amazon · eBay |
| 3 | TrueAm Polaris RZR Dual Battery Kit UTV-SBI-CM | $130-$150 | Amazon |
| 4 | TrueAm UTV-SBI-CM-RZR Dual Battery Kit | $130-$150 | Amazon |
| 5 | Rad UTV TrueAM RZR Dual Battery Kit with Isolator and Battery | $350-$410 | Amazon |
| 6 | Motobatt DBKQM-P01 Polaris Dual Battery Kit | $430-$500 | Amazon |
| 7 | Trail Star Audio RZR Dual Battery Kit | $230-$280 | Amazon |
| 8 | TrueAm UTV-SBI-18 Isolator with PEP | $60-$100 | Amazon · eBay |
| 9 | TrueAm UTV-SBI-CK Dual Battery Connecting Kit | $95-$115 | Amazon · eBay |
The picks, in detail
Polaris Secondary Battery Install Kit 2884347
OEM kit for listed RZR Pro XP, Pro R, Pro S and Turbo R models, requiring a separate auxiliary battery.
- OEM RZR platform fitment list
- positive and negative cables
- battery strap bracket
- current Polaris fitment support
- includes required install components
- battery sold separately
Polaris 12V 30Ah AGM Auxiliary Battery 4014609
The Polaris 30Ah AGM auxiliary battery specified in the 2884347 installation instructions.
- 12V AGM construction
- 30Ah capacity
- OEM auxiliary-battery part
- documented match for 2884347
- no battery-size guesswork
- battery only, not a kit
TrueAm Polaris RZR Dual Battery Kit UTV-SBI-CM
A vehicle-specific TrueAm kit for listed RZR 1000, XP 4 Turbo S, S4 and XP High Lifter applications.
- UTV-SBI-18 smart isolator
- vehicle-specific connecting kit
- automatic priority charging
- protects primary battery first
- published RZR application list
- auxiliary battery not included
TrueAm UTV-SBI-CM-RZR Dual Battery Kit
TrueAm’s RZR, Ranger and General dual-battery isolator kit for high-accessory-demand machines.
- RZR-specific SKU
- PEP smart battery management
- isolator and connection system
- RZR-specific catalog listing
- automatic battery separation
- confirm location/model choice at checkout
Rad UTV TrueAM RZR Dual Battery Kit with Isolator and Battery
A complete retail package that includes TrueAM UTV-SBI-18, wiring, relay components and a selectable AGM battery.
- smart isolator
- wiring and relay components
- AGM battery choice
- complete-package option
- battery choice included in configuration
- confirm exact machine fit before ordering
Motobatt DBKQM-P01 Polaris Dual Battery Kit
A current Motobatt dual-battery kit listed for Polaris RZR, Ranger XP 800/900/1000 platforms with batteries.
- batteries included
- Polaris RZR/Ranger application listing
- complete kit format
- includes batteries
- published platform list
- not for newer Pro-platform RZRs unless listed
Trail Star Audio RZR Dual Battery Kit
A RZR-oriented retail kit for accessory-heavy machines, sold separately from the brand’s auxiliary batteries.
- RZR application category
- dual-battery kit
- accessory-power focus
- current specialist retailer option
- can be paired with matching battery
- verify model-specific bracket before purchase
TrueAm UTV-SBI-18 Isolator with PEP
A labelled near-miss: the smart UTV battery isolator component used in compatible complete systems.
- PEP smart isolator
- automatic operation
- UTV electrical component
- component for a matched system
- protects starting-battery priority
- not a tray, wiring or battery kit
TrueAm UTV-SBI-CK Dual Battery Connecting Kit
A labelled near-miss connecting kit for compatible UTV dual-battery builds, without a RZR-specific tray.
- connection hardware
- dual-battery wiring kit
- UTV format
- useful replacement or component kit
- current TrueAm product
- not a complete RZR-specific installation
Buying tips
- Match the kit to the exact RZR platform and model year; Pro XP, Pro R, Pro S, Turbo R and earlier XP machines are not one fitment class.
- Check whether the listing includes the auxiliary battery, tray, isolator and wiring rather than assuming a product called a kit includes every component.
- Use the vehicle and kit manufacturer’s instructions for electrical protection and routing; an isolator’s current rating alone does not establish compatibility.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.