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PAC PAC-80 dual battery isolator relay unit

PAC Audio

PAC PAC-80 High Current Relay Dual Battery Isolator

SKU CH-03TB-6WF68

Isolates a second battery for dedicated stereo power, handling 80-amp continuous current and 150-amp surges without voltage drop

  • Product typeInstallation Tools
  • Handles 80 A continuous and 150 A surge current
  • Isolates second battery for dedicated stereo power
  • No voltage drop compared to conventional isolators
  • Supports multi-battery systems with high current relay
  • Ideal for show systems with lighting and motorized enhancements

Dual Battery Isolator for Car Audio

The PAC PAC-80 relay isolates a second battery so the stereo system draws power without draining the main starting battery. It is built for installers and enthusiasts adding a dedicated audio battery to a vehicle.

80 Amp Continuous and 150 Amp Surge Capacity

The unit carries 80 amps continuously and handles 150 amp surges for short bursts. This headroom supports lighting and motorised enhancements in show systems, while the design avoids the voltage drop common with conventional isolators.

Replaces Diode-Type Isolators That Cause Voltage

Swapping a diode isolator for this relay restores full charging voltage to the auxiliary battery. The upgrade is worthwhile whenever the existing isolator starves the second battery or limits high-current audio performance.

How it compares

Measured against everything we stock in Car Stereos & Multimedia Receivers, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 96% of the 3,253 comparable items (median $212.99).

Specifications

Product
Brand namePAC
Product typeInstallation Tools

Questions about this item

Will the PAC PAC-80 isolator work with my existing 80-amp alternator and second battery without causing a voltage drop?

Yes, the unit handles 80-amp continuous current and 150-amp surges while isolating the second battery without the voltage drop common in conventional isolators.

How can I verify the PAC PAC-80 is isolating my second battery correctly after installation?

With the engine off, measure voltage at both batteries; the auxiliary battery should hold charge independently while the primary battery reads lower, confirming the relay has separated the circuits.

What comes with the PAC PAC-80 High Current Relay and what extra parts are needed for a dual-battery install?

The package contains the 80-amp relay isolator unit; you must supply suitable gauge power cable, ring terminals, fuses or circuit breakers, and mounting hardware to complete the installation.

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