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Dual Battery Isolators & VSR Kits

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Protect your starting battery with high-integrity Voltage Sensitive Relays (VSR) and electronic isolators from The Battery Cell. Explore our comprehensive range of standalone smart isolators, full DIY dual battery installation kits, and premium accessories engineered to keep your auxiliary systems running flawlessly across NZ.

Dual Battery Isolators & VSR Kits

Smart power management made simple. At The Battery Cell, we stock an industry-trusted range of automatic Voltage Sensitive Relays (VSRs) and advanced electronic isolators designed to safely distribute charge to your secondary battery network while completely protecting your primary starting battery.

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Heavy-Duty Smart Relays & Complete Dual Battery Installation Kits

Setting up a secondary house or cycling battery doesn't have to be complicated. Our collection features premium-grade options built to handle New Zealand’s demanding conditions, whether you need a standalone 12V 100A or 150A programmable VSR, an electronic isolator, or a full, comprehensive DIY dual battery kit that includes all the necessary heavy-duty cables, lugs, and hardware to get the job done right the first time.

Unlike cheap alternatives that break down under thermal stress or cause system parasitic draw, every single isolator we source is selected for its engineering integrity and longevity. It aligns perfectly with our business philosophy: “The longer you get out of our batteries, the happier you are... and the happier we are.” By ensuring your dual battery system isolates properly when the engine is off, you safeguard both your starting power and your expensive deep-cycle investments.

From smart battery monitors to low-voltage disconnects and heavy-duty automatic relays, we have access to the exact setup your setup requires. Order online for swift nationwide delivery, or visit our Seaview showroom in Lower Hutt to chat with our experienced team. Get expert technical support from The Battery Cell today.

YES -we are that same awesome Battery Supplier that used to be on The Esplanade!

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