20 Best Boat Dual Battery Wiring Diagram [2024]

Are you looking for the best Boat Dual Battery Wiring Diagram? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Boat Dual Battery Wiring Diagram.

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1 Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete... Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit,...
2 Camco RV Large Battery Hold-Down Tray | Holds Automotive, RV, and Marine Batteries to Stop Movement... Camco RV Large Battery Hold-Down Tray | Holds Automotive, RV, and Marine Batteries to Stop...
3 12V 140A Dual Battery Isolator with Wiring Cable Kit -VSR Voltage Sensitive Relay Compatible with... 12V 140A Dual Battery Isolator with Wiring Cable Kit -VSR Voltage Sensitive Relay Compatible with...
4 Patioer Dual Battery Isolator Kit, 12V 140 Amp Voltage Sensitive Relay & Wiring Cable Kit - VSR... Patioer Dual Battery Isolator Kit, 12V 140 Amp Voltage Sensitive Relay & Wiring Cable Kit - VSR...
5 Spartan Power Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay VSR for Vans, Trucks,... Spartan Power Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay VSR for Vans, Trucks,...
6 DEWINNER 12V 140Amp Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay, with LED... DEWINNER 12V 140Amp Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay, with LED...
7 Dual Battery Isolator Kit, GOLDPAR 12V 140Amp Sensitive Relay VSR Pro Dual Battery Kit & Wiring... Dual Battery Isolator Kit, GOLDPAR 12V 140Amp Sensitive Relay VSR Pro Dual Battery Kit & Wiring...
8 Seachoice Battery Select Switch, Disconnect Isolator Cutoff, Dual, 12 -50V Seachoice Battery Select Switch, Disconnect Isolator Cutoff, Dual, 12 -50V
9 Dual1-2-Both-Off Boat Battery Disconnect Switch,12V-60V Battery Cut/Shut Off Switch for Marine Car... Dual1-2-Both-Off Boat Battery Disconnect Switch,12V-60V Battery Cut/Shut Off Switch for Marine...
10 MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart... MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual...
11 Nilight - 50004R 120 Pcs/60 Pairs Quick Splice Wire Terminals T-Tap Self-stripping with Nylon Fully... Nilight - 50004R 120 Pcs/60 Pairs Quick Splice Wire Terminals T-Tap Self-stripping with Nylon...
12 MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic... MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery...
13 LotFancy 6 AWG 20 Inches (Each) Battery Cables Set with Terminals, 3/8-Inch Lugs (Positive and... LotFancy 6 AWG 20 Inches (Each) Battery Cables Set with Terminals, 3/8-Inch Lugs (Positive and...
14 TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit
15 Nilight 90101E 5Gang Multi-Function 5 Gang Rocker Dual USB Charger + Digital Volmeter +12V Outlet... Nilight 90101E 5Gang Multi-Function 5 Gang Rocker Dual USB Charger + Digital Volmeter +12V Outlet...
16 Dual Battery Isolator Kit - 12 Volt 140 Amp Voltage Sensitive Relay - Complete VSR Double Battery... Dual Battery Isolator Kit - 12 Volt 140 Amp Voltage Sensitive Relay - Complete VSR Double Battery...
17 12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by KeyLine Chargers - Voltage Sensitive... 12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by KeyLine Chargers - Voltage...
18 Car Battery Terminal Connectors, 2 Pcs 4 Way Quick Release Disconnect Car Battery Terminal for... Car Battery Terminal Connectors, 2 Pcs 4 Way Quick Release Disconnect Car Battery Terminal for...
19 1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for Marine... 1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for...
20 Nilight 4 in 1 ON/OFF Charger Socket Panel Dual USB Socket Power Outlet & LED Voltmeter &Cigarette... Nilight 4 in 1 ON/OFF Charger Socket Panel Dual USB Socket Power Outlet & LED Voltmeter...
Bestseller No. 1
Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete...
  • 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...
  • EASY TO INSTALL - No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is...
  • VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR)...
  • FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation...
  • 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...
SaleBestseller No. 2
Camco RV Large Battery Hold-Down Tray | Holds Automotive, RV, and Marine Batteries to Stop Movement...
  • Holds Batteries in Place: Safely holds group 27, 30 and 31 automotive, RV and marine batteries to stop movement during transportation
  • Safe and Durable Construction: Constructed of heavy-duty, acid-defiant plastic with stainless steel hardware
  • Fit: Fits batteries up to 12 11/16-inches (L) x 6 ¾-inches (W) x 8 ¾-inches (H)
  • Overall Dimensions: 13 1/8-inches (L) x 8 ½-inches (W) x 10 3/8-inches (H)
  • Includes: (1) tray, (2) rods, (1) cross bar and (2) knobs
Bestseller No. 3
12V 140A Dual Battery Isolator with Wiring Cable Kit -VSR Voltage Sensitive Relay Compatible with...
  • This product is designed for dual battery systems,suit for Most 12V Charging systems.surge protection,Automatically sensing voltage level of main...
  • Voltage Sensitive Relay:Voltage Sensitive Relay:Cut in volt 13VDC,Cut out volt 12.8VDC.Ensure main battery is always charged and ready to run the...
  • Constructed with a weatherproof body IP65 and durable silver tipped contacts
  • Package include:1X 24” length Red Cable (with single connector)丨1x12” length Red Cable (with two connector)丨1x12” length black Cable (with...
  • 2 Year Warranty:For any reason, if you are not satisfied with your purchase, contact us directly. We offer a 2-year warranty, 100% satisfaction...
Bestseller No. 4
Patioer Dual Battery Isolator Kit, 12V 140 Amp Voltage Sensitive Relay & Wiring Cable Kit - VSR...
  • VSR Battery Isolator -This 140 Amp Dual Battery Smart Isolator cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your main battery is...
  • IP67 Certified- Strengthened nylon shell with well sealed design, water proof, dust proof and shock resistant, it can work in extreme weather...
  • Easy to Install- Every component to complete the installation is included, like leads, connectors, screws, zip ties. No alternator or ignition...
  • Wide Compatibility- This battery isolator suitable for 12V 4WD, Truck, SUV, RV, ATV, UTV, Boat and so on.
  • Package Includes- 1x battery isolator; 1x red battery cable; 1x black ground battery cable; 2x positive battery terminal; 1x negative battery...
Bestseller No. 5
Spartan Power Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay VSR for Vans, Trucks,...
  • NOW ON AMAZON - EASY TO INSTALL: Designed for dual battery systems or second battery bank in your van, truck, RV, UTV, off-road vehicles, marine...
  • VSR – VOLTAGE SENSITIVE RELAY: Automatic 140 Amp Dual Battery Isolator enables you to charge two battery systems from one alternator at the same...
  • VANLIFE? Now you can safely add additional batteries to help support your accessories such as power inverters, MPPT charge controllers, solar panels,...
  • IP65 Protected: IP65 enclosure offers complete protection from dust, oil, and other non-corrosive material. Waterproof protection up to water...
  • 3 YEAR WARRANTY: Every Spartan Power 12V 140 Amp Dual Battery Isolator is backed by a 3 year warranty. Have a question? We are an American company...
SaleBestseller No. 6
DEWINNER 12V 140Amp Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay, with LED...
  • 【Easy installation and waterproof】 No need for alternator or ignition connection. After installation, it can still be used normally even if it is...
  • 【Manual Modes】 Press and hold the "Power" button for 3 seconds, the upper blue (LED) indicator light is on, and the manual mode is turned on. In...
  • 【Automatic Mode】Long press the "Power" button for 3 seconds, the upper blue (LED) indicator light goes out, and the automatic mode is turned on....
  • 【LED SCREEN REAL-TIME VOLTAGE DISPLAY】 The surface of the isolator is equipped with an LED display to display the current-voltage status in...
  • 【FITS A WIDE VARIETY OF VEHICLES】 Just like having two independent power sources, the dual battery isolator kit enables your accessories to run on...
SaleBestseller No. 7
Dual Battery Isolator Kit, GOLDPAR 12V 140Amp Sensitive Relay VSR Pro Dual Battery Kit & Wiring...
  • Robust and durable: It's like having two separate power sources for each battery and only one alternator! This dual battery isolator can also...
  • Easy to install: This dual battery isolator kit includes all the parts needed for a complete installation (battery cable, battery terminals, copper...
  • Suitable for a wide range of vehicles. GOLDPAR dual battery isolator kit to provide power for recreation. Suitable for 12V 4WD, boats, trucks, cars,...
  • What's in the box: 1x Smart Battery Isolator, 1x6000mm long 10mm square red cable with terminals on both ends, 1x600mm long 10mm square black ground...
  • While ensuring quality, it offers a 1-year warranty policy. Please buy with confidence.
SaleBestseller No. 8
Seachoice Battery Select Switch, Disconnect Isolator Cutoff, Dual, 12 -50V
  • Permits selection between batteries for starting, charging or operation in parallel
  • For use with two or more batteries and systems under 50V
  • UL listed, ignition protected and CE approved
  • Capacity: 250A continuous, 360A intermittent
  • Size: 5-1/4 inch x 2-5/8 inch
Bestseller No. 9
Dual1-2-Both-Off Boat Battery Disconnect Switch,12V-60V Battery Cut/Shut Off Switch for Marine Car...
  • 【Great Compatibility】This dual Marine battery switch is Suitable For Two Batteries, It can stand alone, or be locked together with other switches...
  • 【Heavy Duty】Battery shut off switch comes with 1-2-both-off 4 positions,200 A continuous at DC 12V, 455 A Intermittent at DC 12V, 1250 A momentary...
  • 【Easy to install】Refer to wiring diagram for installation,ABS plastic housing, making it ideal for marine applications,rear cover insulates...
  • 【Disconnects the battery safely】This Battery cut off switch could eliminate any power draw from the battery when vehicle or boat is not in...
  • 【Wide Application】The Ignition protection of battery power kill switch,Which installed Safely on petrol-powered boats or vehicles,Widely...
SaleBestseller No. 10
MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart...
  • 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...
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine...
  • 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
SaleBestseller No. 11
Nilight - 50004R 120 Pcs/60 Pairs Quick Splice Wire Terminals T-Tap Self-stripping with Nylon Fully...
  • Self-Stripping electrical tap connectors - Nilight self-stripping electrical t-tap connectors makes tapping into an existing wire a quick and easy job
  • Versatile kit - 60 piece T-Tap Wire Connectors plus 60 piece; Male Quick Disconnects will last for numerous wiring projects. Marine, automotive,...
  • Thick tinned copper contacts - Thicker tinned copper contacts provide maximum conductivity and prevents the wire from shorting out efficiently
  • Quality t-tap connector housing - Quick splice T-Tap connectors will securely lock on the wire. Plastic housing will not open after it has been...
  • Perfectly fitting male quick disconnects - Nylon male disconnects have been designed to lock tightly on the T-Tap connectors to prevent sliding out
SaleBestseller No. 12
MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic...
  • 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...
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine...
  • 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
SaleBestseller No. 13
LotFancy 6 AWG 20 Inches (Each) Battery Cables Set with Terminals, 3/8-Inch Lugs (Positive and...
  • 【2 CABLES】This 6awg 20 inches battery cables contain one positive (Red) and one negative (Black) power inverter cables. 3/8” ring at each end....
  • 【UL LISTED】Our cables are UL listed. UL testing makes sure that wire sizes are correct or devices can handle the amount of current they claim to...
  • 【TINNED COPPER】Tin-plated copper has good stability, wear resistance, corrosion resistance, which improves the oxidation resistance of copper and...
  • 【PVC INSULATED JACKET】Flexible PVC insulation of battery cables resists abrasion, waterproof and moisture proof, flame retardant and heat...
  • 【WIDE APPLICATION】The 6 gauge positive and negative cables are ideal for car automotive, solar, marine, RV, motorcycle, golf cart, lawn/garden...
Bestseller No. 14
TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit
  • RETURNS AUTHORIZEDAMAZON WILL NOTACCEPTED
  • 1- True UTV-SBI-18 Isolator with silicon insulators andDual Lock fastner
  • 1- 36mm blue led volt meter with dual rdisplay (requires29mm mounting hole), inludesx 18ga duplex wire with connectors
  • 1 ea- Trueinch sealed 6ga Red and Black Cables with 6mm lugs
SaleBestseller No. 15
Nilight 90101E 5Gang Multi-Function 5 Gang Rocker Dual USB Charger + Digital Volmeter +12V Outlet...
  • Multi Functional Switch Panel: Product integrated with dual USB port, digital voltmeter, 12V outlet, waterproof board and 5 on / off rocker switches,...
  • Safety Protection: Real time LED voltmeter shows the status of the voltage. Pre-wire design with 15A fuse providing you with an overload, over-current...
  • Wide Application: This switch is suitable for 12V-24V Systems and widely applicable for most DC 12V-24V cars, UTV/ATV, trucks, trailer, RV, caravan,...
  • IP65 Waterproof: The waterproof marine switches perform well in a marine environment due to their splash-proof panel, water resistant caps
  • Package includes: Pre-Wired switch panel, DIY Stickers and 4 screws
Bestseller No. 16
Dual Battery Isolator Kit - 12 Volt 140 Amp Voltage Sensitive Relay - Complete VSR Double Battery...
  • 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...
  • 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...
  • Complete Kit With Printed Installation Manual - This dual battery isolator kit manufactured by AA Ignition is a complete kit which includes the...
  • Premium Rugged Construction - This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip...
  • 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,...
Bestseller No. 17
12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by KeyLine Chargers - Voltage Sensitive...
  • 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...
  • VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems in your ATV/UTV vehicle....
  • RUGGED DURABILITY: Unlike other chargers on the market today, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This...
  • WHAT YOU GET: 140 Amp Smart Battery Isolator; 7AWG x 12” Red Cable with two connectors; 3AWG x 12” Black Cable with two connectors; 7AWG x 24”...
  • 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...
SaleBestseller No. 18
Car Battery Terminal Connectors, 2 Pcs 4 Way Quick Release Disconnect Car Battery Terminal for...
  • [4 WAY BATTERY TERMINAL] Made of high-quality brass and steel material which is corrosion resistant with excellent electrical conductivity that can...
  • [POSITIVE & NEGATIVE LABELED] Positive and Negative is clearly labeled on the battery terminal connectors that you can easily recognize.
  • [WIDELY USE] Our battery terminal connectors are compatible with cars, vans, caravan, tachts, trucks, pickups, buses, etc. Works on round post auto...
  • [EASY TO USE] Equipped with a hex wrench which can help you to complete installation more convenient and easier. And it only takes a minute to clean,...
  • [WHAT YOU RECEIVE] Package contains 2 battery terminal connectors (positive and negative), 4 insulation sleeves, 2 battery terminal cleaning brushes,...
Bestseller No. 19
1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for Marine...
  • Operation: 1-2-both-off, 4 position, 200A DC Continuous (1hr), 455A DC Intermittent (5 min), 1250A DC Cranking (10 sec); Voltage: 12V-48V DC; Stud...
  • The patented contour locking system, allowing it to be a stand alone unit, or locked together with other switches to isolate and secure the electrical...
  • This battery cut shut off kill switch has four removable side plates. The rear cover insulating the rear terminals against any short circuits....
  • Tin-plated copper studs and nuts; Ignition-protected. ABS plastic housing, durable made for safety use
  • Widely used for Car, Marine, Boat, RV, Camper, Travel Trailer, Truck, ATV, UTV, Battery banks and other 0 up to 60V Devices; 1 Year Warranty--a...
SaleBestseller No. 20
Nilight 4 in 1 ON/OFF Charger Socket Panel Dual USB Socket Power Outlet & LED Voltmeter &Cigarette...
  • 4 in 1 DIY Toggle Switch Panel: Dual USB Socket + Voltmeter + 12V Outlet + ON/OFF Toggle Switch. It’s convenient for installing and operating. Also...
  • Real Time LED Voltmeter: The LED voltmeter shows accurate voltage status, reminds you whether the voltage is at a normal level, more secure for...
  • SAFETY: The wires was built-in 10A Fuse for over-load protection. It can charge safely, without risk of overheating or damaging devices.
  • Multifunctional product with LED indicator light, perfect for travel use. Fits for 12-24V Cars, Trucks, Marine Boats, ATV, RV, etc. The USB socket...
  • Package includes: 4 in 1 Toggle Switch Panel, 3 packs of connecting wires, 9 insulated terminals, 4 Mounting Screws, 1 Wiring Diagram

Having trouble finding a great Boat Dual Battery Wiring Diagram?

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After hours of searching and using all the models on the market, we have found the best Boat Dual Battery Wiring Diagram for 2023. See our ranking below!

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John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Boat Dual Battery Wiring Diagram that you consider buying. Your questions might include the following:

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  1. Brand Value: Every brand of Boat Dual Battery Wiring Diagram has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Boat Dual Battery Wiring Diagram?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Boat Dual Battery Wiring Diagram.
  5. Customer Ratings: Number ratings grade Boat Dual Battery Wiring Diagram objectively.
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  7. Product Quality: You don’t always get what you pay for with an Boat Dual Battery Wiring Diagram, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Boat Dual Battery Wiring Diagram is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Boat Dual Battery Wiring Diagram information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

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FAQ:

Q: How do you replace a boat battery?

A: Replacing a boat’s battery takes roughly 20 minutes and requires latex gloves, goggles, baking soda and water, a wire bristle brush, and white lithium grease. Choose the replacement battery Boat battery options include lithium, gel-cell and flooded-cell batteries.

Q: How to wire a boat?

A: The Electrical Source: a Battery In a boat,electricity is stored in one or more batteries. The batteries are charged by your engine’s alternator,or auxiliary battery charger. … Main Battery Switch In nearly all cases your boat wiring system should have a marine grade main battery disconnect switch . … Battery Switch Bypass Loads (Bilge Pump,etc) It’s pretty standard in boat wiring to bypass the main battery switch for one thing: The boat’s bilge pump float switch. … Get the Source to the Boat’s Helm The next step is to get the power from the house battery up to the switch panel where we can use it … Install Terminal Block as Breakout Point If you get your boat’s switch panel fully wired ( more on that here ),then you’ll have an easy to install wiring … Run Load Wiring to the Terminal Block and Buss Bar

Q: What is a dual battery switch?

A: Simple dual battery switch. The dual battery switch is the simplest and easiest to construct. It is appropriate for the boater that simply wants to “day-boat” but wants the safety of having a backup battery on board. In this configuration, a dual battery switch is connected to the engine battery terminal, and a second battery added.