300A Continuous Rating Waterproof and Dustproof 2 Position ON/OFF Marine Battery Disconnect Switch Battery Isolator Switch

The MT100-B is the heavy-duty member of the NEKEKE battery switch range: a master isolator rated 300A continuous at 32V DC, built for installations where accessory loads have outgrown a light-duty cut-off. It gives the operator a single, unmistakable way to take the battery bank offline — and to bring it back — without touching a terminal or hunting for a fuse.

Cut the circuit before winter storage and the slow bleed from bilge pumps, radios, chartplotters and standby modules stops immediately. Isolate it before service work and the technician starts from a genuinely dead circuit instead of a live one. Both use cases come down to the same thing: predictable, repeatable control over the battery loop.

Internally the contact assembly is sized for the higher current, while the outer housing keeps the same short barrel shape — so an upgrade from a smaller isolator does not force a redesign of the panel.

• 300A continuous path — sized for winches, inverters, livewell pumps and dense accessory stacks.
• Two detented positions — ON and OFF only, each with a firm seat so the knob cannot rest between states.
• Sealed enclosure — splash, salt mist and dust are kept away from the contact chamber.
• Shock-resistant moulding — tolerates vibration from planing hulls and rough trails alike.
• Threaded collar fixing — one hole, one nut, no bracket to fabricate.
• Compact barrel — slides behind shallow dashboards and into tight battery lockers.
• Visible position indicator — the knob itself tells you the circuit state at a glance.

Any 12V, 24V or 48V bank that needs one master isolation point can take this switch, provided the total continuous draw stays inside 300A:

• Marine — centre consoles, rigid inflatables, pontoon boats and compact yachts with pump-heavy accessory loads.
• Recreational vehicles — motorhomes and camper vans whose house bank sits unused for months.
• Powersport and off-road — ATVs, UTVs and side-by-sides parked for the season.
• Automotive and plant — cars, light trucks and generator sets needing a service isolation point.

1. Switch everything off, then disconnect the negative terminal before the positive.
2. Choose a dry, reachable panel area that leaves the knob a full, unobstructed arc.
3. Drill to the barrel diameter and test-fit the switch before final tightening.
4. Seat the body, tighten the threaded collar, and confirm it will not rotate under hand pressure.
5. Land the battery negative lead on one stud, the load lead on the other, then torque both nuts.
6. Reconnect, set the knob to ON, and confirm continuity with a meter before returning the unit to service.

Dual-bank tip: one switch per bank gives independent isolation, so a fridge or bilge pump can stay live on the second battery while the first is taken out of circuit.

• Minimum order — 5 pcs per model.
• Price — negotiable, quoted against quantity and packing requirements.
• Monthly capacity — 5000 pcs.
• Production lead time — 10 to 15 working days for standard runs.
• Payment — T/T or Western Union, 30% deposit with the balance before shipment.
• Packing — neutral white box inside a brown export carton; branded packing with written trademark authorisation.
• Incoterms — EXW, FOB, CFR, CIF and DDU.