SPECIFICATIONSThe True® Smart Battery Isolator (SBI) is programmed with a 10-second delay before engaging or disengaging.DC Power: 12V12V 140A Smart Battery Isolator with Cut-In: 13.4VCut-Out: 12.9VContinuous Current Rate: 140AIntermittent Current Rate: 170ABack-up Current at 12.5V: <=13.0mAIgnition Protection: UL1107/UL1500Operation Temperature Range: -30 to 105°C T Trusted by Leading Brands A TRUE® exclusive! Why Choose True® Isolator P.E.P. (Power Efficiency Programming)True’s programming ensures the isolator engages and disengages with a 10-second delay. This prevents unnecessary wear on the relay and ensures your primary battery is sufficiently stabilized before the secondary battery is introduced to the charging circuit. Built for Brutal EnvironmentsTrue specifically markets to the off-road and marine communities, so their hardware is built to a higher "ingress protection" standard: True® Dual Smart battery isolator can be installed between batteries with a common ground to automatically control the charging process to the batteries but continue to provide isolation of them when a charging source is unavailable. The small size and rugged construction of these units allow for quick simple installation for even the most novice Driver. True® Smart dual battery isolator sensing features To make things even better this unit is “Dual Sensing” which senses the charge of both batteries. If either battery is receiving a charge, e.g. a battery charger is connected to the auxiliary battery; the SBI True® battery isolator system kit will engage and charge both batteries.The advanced technology always ensures that the first battery is fully charged (13.4v) before the connection is made to the second battery. This prevents problems that may result from your charging source being too low in amps to charge all batteries at once. If placed in linear sequence between each battery the True® 12v smart dual battery isolator can provide proper charging for several batteries in multiple battery setups such as in larger boats that may have 2 or more house batteries.You can easily see by the picture of 12v True® smart dual battery isolator below the unit is designed to withstand moisture with the silicone-covered circuit board. Although I would not plan on mounting in a position where it would be submerged it is certainly designed to take all the splashing, dripping, spilling, and other various wet conditions that would come along.Notice also the clearly labeled connection posts and the black common ground lead. To be even more convenient all four sides are designed with “knockouts” so that you can easily route your connecting wires in any direction.Electronic Specifications True part number Rating Voltage Continuous Current Intermittent Current Cut in voltageCut out voltage Ignition ProtectionIP-DS14012.913.412V 140 Amp 170 Amp 13.4 V*12.9 V*UL1107/UL1500LED IndicationsOn: Isolator engagedOff: Isolator disengagedDimensions2.7(L) x 2.7(W) x 1.95(H) inches Testimonials I run a 2021 Chevy Silverado with dual batteries, a winch, and a sound system with a large speaker setup that hits hard. Before installing the True® Battery Isolator, I was always second-guessing my setup—especially during long job sites or weekend overlanding trips.This isolator changed everything. It automatically manages the charge between my starter and auxiliary batteries without me lifting a finger. No switches, no worries. I can run my gear all day and still fire up the truck without hesitation. Austine Jones ARIZONA Installing the Silverado Battery Isolator was one of the best upgrades I’ve made to my truck. I run a lot of accessories—lights, winch, and a fridge for camping—and this isolator keeps my starter battery safe while powering everything else. The automatic switching is seamless, and I never worry about being stranded with a dead battery. It’s rugged, reliable, and built for real-world use. I recommend it to any Silverado owner who values dependable power management on and off the road. Logan Parker COLORADO Ready to Install Everything you need, right in the box. With detailed instructions and all hardware included, you’ll go from unboxing to fully mounted in no time. Simple, solid, and DIY-ready. Heavy-Duty Wiring & Components Industrial-grade cables, terminals, and connectors handle high current loads and are built for rugged use. Frequently Asked Questions Does installing this kit void my factory warranty? No. Because this is a non-intrusive “straight-to-battery” connection, you aren’t tapping into the fuse box or cutting factory wires. It functions as an independent add-on, keeping your factory electrical system intact. Does the system require manual switching? No. The True® Smart Battery Isolator operates automatically, connecting and disconnecting batteries based on voltage levels. Can I mount it without drilling holes? Yes. The kit includes 3M Dual Lock™, allowing you to mount the unit securely without screws. It can also be left suspended if preferred. Is installation difficult? No. Most True® Dual Smart Battery Isolator kits are designed for straightforward installation with clear wiring instructions. Many users can install the system with basic tools. What is P.E.P.® (Proprietary Efficiency Programming)? P.E.P.® is TrueAm’s smart logic that optimizes battery protection and charging efficiency.It ensures the isolator only connects when safe and beneficial for both batteries Will the isolator protect my starter battery? Yes. The isolator automatically disconnects the auxiliary battery when the engine is off, ensuring the starter battery remains fully charged for engine starting. Can I manually override or shut it off? The male connector underneath can be wired for remote shutoff.Inline switches are optional but not required—SBI handles disconnection automatically. Does the isolator charge both batteries? Yes. When the engine is running, the isolator connects both batteries so they charge simultaneously from the alternator or charging system. Is it compatible with all batteries? It’s designed specifically for Chevy Silverado and GMC Sierra trucks, but can also be adapted for other GM vehicles with similar 12V systems
