Dual Battery Relay Kit

Are dual battery relay kits worth it?

A relay kit switched by a push button so that one person can operate both batteries in their vehicle without turning off the engine. They may be worth it if you have an older car that takes some time to start and hence, doesn’t reliably charge when started for a short period, or if you park near your workplace and drive over at lunchtime to get some work done. But modern cars are much more efficient and reliable with dual battery configurations which should not need switching out like this. The box says “relay kit recommended for anyone with a starterless system” but I don’t see why? What does it do? What’s involved?
It is not essential but merely recommends it- what is the point


Rugged ridge dual battery relay kit install

The specific kit you’re looking for is the RUG-1258-001385 Rugged Ridge Battery Relay Kit. In this video, a z71 sv650 dash camera will be installed to replace the gas tank gauge while an auxiliary battery will be hooked up to power it so as not to drain your primary battery. For this specific install, our car didn’t have a crosstie bar or mount points that were accessible from inside the engine bay. Which meant that we had to buy some brackets and make a custom mounting bracket in order for us to clear everything and have room for our cables.

Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
  • FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.
  • BUY WITH CONFIDENCE - Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty. If You are Not 100% Satisfied with Your Purchase, Simply Take Advantage of the "No Questions Asked, 30-Day Money Back" Guarantee.

GMC dual battery relay kit

If you want to conserve on battery life and have the ability to start your vehicle, GMC offers a dual battery relay kit. The mount of the relay is made from durable ABS plastic which means it’s not going to fill like one of those old fashioned chrome or brass models. This model also has mounting holes that will allow for easy installation. The best thing about this set-up is that it can be used with both modified engines and stock engines which is really nice for those of us who no longer have our original engine under the hoods of our vehicles. It’s easy to install too – all you need is basic tools, like screwdrivers, wrenches, pliers and maybe a rubber mallet.

Dual battery isolator kit with voltage sensitive relay (vsr)

You may be happy with a single battery isolator kit, which has limited the voltage that can enter into your engine as it charges (in case of overcharging). This will leave you in need of a voltage sensitive relay if you’re charging from shore power at rates greater than 14.4V, or if you want to connect both batteries through an onboard charger. Alternatively, an alternator upgrade might be worth investigating for higher wattage input levels. For most dual battery setups though, the addition of a voltage sensitive relay is not necessary as long as your original equipment provided fair protection from overcharging and low enough amperage charge rates to keep your batteries healthy on board too – but don’t assume all components are created equal!

Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
  • FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.
  • BUY WITH CONFIDENCE - Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty. If You are Not 100% Satisfied with Your Purchase, Simply Take Advantage of the "No Questions Asked, 30-Day Money Back" Guarantee.

Dual battery relay kit jl jeep

The dual battery relay kit is perfect if you have a second battery to swap with and need a way to disconnect from the alternator so they can charge simultaneously. One of the advantages of having a system like this is that it will allow them both to charge quicker than waiting for one or the other battery to finish charging in series (when only one has power). This won’t necessarily cut down on how long your overall charging time will take, but at least there are fewer pauses throughout the process of recharging if you’re swapping batteries on occasion.

Bestseller No. 1
Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
  • FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.
  • BUY WITH CONFIDENCE - Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty. If You are Not 100% Satisfied with Your Purchase, Simply Take Advantage of the "No Questions Asked, 30-Day Money Back" Guarantee.
SaleBestseller No. 2
KeyLine Chargers 12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro Dual Battery Kit
  • ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called "solid state" devices that can rob you of almost 2 amps of output power! The KeyLine Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.
  • VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
  • RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.
  • WHAT YOU GET: (1) 140 Amp Voltage Sensitive Relay (VSR); (1) 20 ft red battery cable; (1) 2ft black ground battery cable; (2) positive brass marine type battery terminals; (1) negative brass marine type battery terminal; tinned copper lugs & heat shrink; cable ties; easy-to-follow instructions. Easy-to-follow directions for the most novice DIYer. Power wire in, power wire out. What could be easier?
  • BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the No Questions Asked, 30-Day Money Back Guarantee!!
Bestseller No. 3
Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
  • FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.
  • BUY WITH CONFIDENCE - Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty. If You are Not 100% Satisfied with Your Purchase, Simply Take Advantage of the "No Questions Asked, 30-Day Money Back" Guarantee.
Bestseller No. 4
Dual Battery Isolator Kit, 12V 140 Amp Voltage Sensitive Relay VSR Dual Battery Kit Smart Automatic Charger for Marine Car UTV ATV RV Boat Camper Truck
  • VSR Battery Isolator: Battery isolator relay cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged without worry about stuck on road due to drained battery. It's like having two separate power sources for each battery while only having one alternator!
  • Smart Battery Isolator: Battery isolator allows run your accessories from separate battery when the engine is off while keeping your main battery charged and prevents the starting battery from being run down by your equipment. Now you can add more large capacity electrical to your vehicles, such as solar panel, audio, light, etc.
  • IP65 Certified: Heavy duty silicone sealed interior with reinforced case is certified for off-road use, which is water resistant, shock resistant, dust proof and safe to use in harsh condition.
  • Custom Fit: Compact battery isolator can be installed almost anywhere with its 2.6" x 2.6" x 2" size. Great fit for under the seat, under the hood installation for your marine boats, truck, RV, UTV, van, off-road vehicles.
  • Lifetime Warranty: If you have any question with our battery isolator kit, please feel free to contact with us. Our professional Technical Support would solve the problem for you and Customer Service Team will help you RETURN OR REFUND.
Bestseller No. 5
Dual Battery Isolator Kit, 12V 140Amp Sensitive Relay VSR Pro Dual Battery Kit, IP65 Waterproof, with Reinforced Housing Smart Battery Isolator Kit for Car, Vehicle, RV, ATV, UTV, Boat, Camper, Truck
  • Dual battery isolator-without worrying about the battery being blocked on the road due to the exhaustion of the battery. It's like each battery has two independent power sources and only one alternator!
  • IP65 certification-The sturdy heavy-duty silicone seals are certified for off-road use, waterproof, shockproof, dustproof, and can be used safely in harsh conditions.
  • Easy to use-This VSR kit comes with all the parts (battery cables, battery terminals, copper lugs, heat shrink tubing, cable ties) required for a complete installation.
  • Durability-The dual battery isolator kit is all the tools needed to charge a dual battery system. It has a pressure-sensitive chip that ensures that your main battery is always in a ready state to keep the vehicle moving.
  • Suitable for all kinds of vehicles-with dual battery isolator kit to provide power for entertainment. Suitable for 12V 4WD, ships, trucks, cars, off-road vehicles, caravans and camping vehicles.
Bestseller No. 6
Dual Battery Isolator Kit - 12 Volt 140 Amp Voltage Sensitive Relay - Complete VSR Double Battery Automatic Charger - Fits Trucks, SUV, ATV, UTV Boats and more - Safe, Water and Vibration Resistant
  • Dual Battery Isolator Kit - enables your accessories to run from a separate battery while the engine is not running on your vehicle while keeping your main battery charged and your vehicle always ready to go and start when you want it to. This dual battery isolator kit features 12 Volt 140 Amp Voltage Sensitive Relay Isolator and includes all the bits and pieces needed for a complete installation.
  • Fits A Wide Variety of Vehicles - Being the computer age that it is today, a lot of accessories, tools and gadgets that runs on electricity are essential in our everyday living or hobbies. This dual battery isolator kit with printed installation instruction manual gives you the power for your recreation without needing to worry about getting home after.
  • Complete Kit With Printed Installation Manual - This dual battery isolator kit manufactured by AA Ignition is a complete kit which includes the Isolator or Relay, battery Cables, battery terminals, copper lugs, heat shrinks, cable ties and a printed instruction manual.
  • Premium Rugged Construction - This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • Lifetime Warranty - This 12V 140 Amp dual battery isolator kit comes complete with a lifetime warranty. If the part ever fails on your Truck, SUV, RV, ATV, UTV or Boat simply contact us for a replacement. Avoid getting stucked after your recreation by purchasing this dual battery isolator kit from AA Ignition.
SaleBestseller No. 7
MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charger & Wiring Cable Kit
  • 12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage,; Package Include All the Bits and Pieces Needed for a Complete Installation
  • Working Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.3 Volts and Cuts out at 12.8 Volts to Ensuring Primary Battery is Always Ready for Vehicle to Run.
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It.
  • Compatibility: This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV's,marine vehicle, truck, caravan
  • LIFETIME WARRANTY :100% High Quality and Enjoy Full Life Warranty, Free Exchange
Bestseller No. 8
Dual Battery Isolator Kit 12 Volt 140 Amp Voltage Sensitive Relay Complete VSR Double Battery Automatic Charger
  • This item can install to most of vehicle,for example Truck, SUV, RV, ATV, UTV, Boat and so on.
  • Function: Cause your accessories to run from a separate battery while the engine is not working on your vehicle, and at the mean time holding your main battery charged and your vehicle always ready to work.
  • This package is including 12 Volt 140 Amp Voltage Sensitive Relay Isolator and includes all other accessrioes.It is including instruction.
  • It can work in dusty, wet and unexpected extreme weather condition.
  • Warranty : We provide 6-month warranty,If you have any questions ,You can contact us and we will reply you within 24 hours
Bestseller No. 9
EHDIS 12V Relay 200 AMP Battery Isolator Kit 4 Terminal Dual Battery Auto Increase Battery DC 12V-24V Suit for All Type of Cars, Track, Van, Vehicle
  • High Current Battery Isolator 200 AMP Battery Isolator and Relay, Prevents loads on auxiliary battery from draining the starting battery.
  • Great for isolating a second batter making it dedicated to the protect battery life, Extends battery life
  • Automatically check the voltage, when the vice battery is low, it will turn on charge function
  • 200 Amps at 12V Continuous Power Handling, Size (L * W * H mm): 65 * 75 * 85
  • 300 Amps Surge Power Handling (Peak current)
Bestseller No. 10
Dual Battery Isolator Kit - JOYHO 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More
  • RUGGED DURABILITY - This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator.
  • FITS A WIDE VARIETY OF VEHICLES - This dual battery isolator kit with printed installation instruction manual gives you the power for your recreation without needing to worry about getting home after.12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage, Suitable for 12V 4WD, marine, truck, caravan & camping applications.
  • BUY WITH CONFIDENCE - Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the No Questions Asked, 30-Day Money Back Guarantee.