NVX Dual Sensing Smart Relay Battery Isolator — 200A Continuous, Microprocessor-Controlled (Black)

The NVX Dual Sensing Smart Relay is a microprocessor-controlled battery isolator that intelligently separates a second battery for audio or accessories while preserving full voltage and providing up to 200A continuous power.

If you run an aftermarket stereo, amplifiers, or accessory bank on a vehicle, boat, or off-grid rig, the NVX Dual Sensing Smart Relay keeps the house battery dedicated to those loads without causing the voltage loss common to diode isolators. Built around a microprocessor, it monitors voltage on both batteries and switches them together only when appropriate, supplying high continuous current and brief surge capability for demanding audio bursts.

How does the NVX isolator protect my starting battery when I play loud music?

The unit isolates the auxiliary battery so the starting battery remains reserved for engine cranking. When the NVX detects a charging source and safe voltages on both banks, it will connect them; otherwise it keeps them separate, preventing accessory drain from affecting start power.

• Dual sensing microprocessor monitors both battery voltages in real time.
• 200 amps continuous current capacity for sustained accessory draws.
• 300 amps surge handling to accommodate short high-current events from amplifiers.
• Less than 1 amp control draw while engaged to minimize parasitic loss.

Will the NVX cause a voltage drop to my audio battery like traditional isolators?

No — unlike older diode-based isolators that reduce available voltage, this smart relay closes a high-current contact when conditions are right, allowing near-unrestricted charging and discharge between banks. The microprocessor switching ensures efficient transfer and reduces wasted energy.

• Solid-state control with a high-current relay rather than series diodes.
• Switching range 10–16 VDC for compatibility with typical 12V systems.
• Engineered to avoid the constant voltage loss common to passive isolators.

What are the size and installation considerations for the NVX Smart Relay?

The NVX is compact and designed for neat mounting in engine bays, trunks, or equipment compartments. Its small footprint fits tight spaces, but you should use appropriately gauged cables and secure mounting to handle high currents safely.

• Compact dimensions: 2-3/8" W x 2-3/8" D x 3-3/4" H for flexible placement.
• Requires heavy-gauge battery cables rated for 200A continuous loads.
• Simple wiring: sense leads to each battery and main power terminals for switching.

How reliable and power-efficient is the NVX during everyday use?

Designed for continuous automotive and marine applications, the NVX draws under 1 amp when engaged and uses microprocessor logic to avoid unnecessary switching. Its 200A continuous rating and 300A surge capacity make it robust for repeated duty cycles and transient amplifier demands.

• Microprocessor control reduces false engages and maximizes efficiency.
• Low steady-state draw conserves battery when the relay is closed.
• High surge tolerance handles amplifier peaks without damage.

Who is this for: The NVX Dual Sensing Smart Relay is aimed at car audio enthusiasts, marine electronics installers, and anyone who needs a dedicated auxiliary battery for stereos, amps, or accessory loads without compromising starting power. If you want efficient charging, minimal voltage loss, and a compact, high-current solution for isolating a second battery, this unit is tailored to that role.