Battery Isolators
Battery Isolators
Maximize Vehicle Efficiency with Reliable Battery Isolators from Trusted Brands
Vehicles like large trucks, airplanes, boats, and utility vehicles typically rely on two or more batteries that function independently to power 12V or 24V systems. To ensure these batteries are properly charged and operate independently, battery isolators or battery combiners are essential. The primary function of a battery isolator is to prevent the failure of a single battery from incapacitating the entire electrical system. It separates multiple batteries, ensuring that if one battery fails, the others remain operational, providing a crucial backup power source.
Battery isolators also help prevent a vehicle’s electrical system from drawing power from multiple batteries simultaneously, which could quickly drain all batteries and cause system failure. This is especially important in high-demand applications like marine, aviation, and utility vehicles, where reliable power is critical.
At IES, we offer top-quality battery isolators from trusted brands like ProMariner (available in 40 AMP and 90 AMP models) and Mastervolt (available in 70 AMP and 130 AMP models) to meet your onboard electrical needs. These isolators provide dependable, independent charging solutions to keep your vehicles’ electrical systems running smoothly and efficiently.
Showing all 6 resultsSorted by latest
-
Battery Isolators
ProMariner 12072, Battery Isolator, 2 Alternator/2 Batteries, 70 Amp
ProMariner 12072, Battery Isolator, 2 Alternator/2 Batteries, 70 Amp
Amperage:70 Amp   Voltage Range:6/12/24/32/36V DC
Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.
$189.44ProMariner 12072, Battery Isolator, 2 Alternator/2 Batteries, 70 Amp
Amperage:70 Amp   Voltage Range:6/12/24/32/36V DC
Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.
-
Battery Isolators
ProMariner 11073, Battery Isolator, 1 Alternator/3 Batteries, 70 Amp
- ProMariner 11073, Battery Isolator, 1 Alternator/3 Batteries, 70 Amp
- Amperage :70 Amp
- Voltage Range :6/12/24/32/36V DC
-
Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.
$141.43- ProMariner 11073, Battery Isolator, 1 Alternator/3 Batteries, 70 Amp
- Amperage :70 Amp
- Voltage Range :6/12/24/32/36V DC
-
Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.
-
Battery Isolators
ProMariner 11072, Battery Isolator, 1 Alternator/2 Batteries, 70 Amp
Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner 11072, Battery Isolator, 1 Alternator/2 Batteries, 70 Amp
- Amperage – 70 Amp
- Voltage Range-6/12/24/32/36V DC
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.
$129.44Improve Charging Efficiency with ProMariner 70 Amp Multi Battery Isolators for Marine, RV, and Automotive Use
ProMariner 11072, Battery Isolator, 1 Alternator/2 Batteries, 70 Amp
- Amperage – 70 Amp
- Voltage Range-6/12/24/32/36V DC
ProMariner Multi Battery Isolators, featuring gold-plated terminals for improved conductivity, are designed to enhance charging efficiency while preventing the total discharge of your starter battery. These solid-state devices ensure electrical current flows in one direction, allowing energy from the alternators to be distributed evenly across multiple batteries. This setup enables simultaneous charging of multiple batteries while isolating each one during operation, preventing fully charged batteries from discharging into undercharged ones.
These isolators are ideal for systems with one or two alternators connected to multiple battery banks, ensuring reliable power distribution without the risk of draining fully charged batteries. Designed for use with negative ground alternator systems, they are not recommended for use with self-energizing alternators. The ProMariner Multi Battery Isolators provide peace of mind by maintaining efficient power flow and battery protection in marine, RV, and automotive applications.
- Rated for use with negative ground alternator systems ranging from 70 amps to 130 amps output
- Will operate on 6, 12, 24, 32, and 36 volt systems
- Charge Multiple Batteries While Preventing Interbank Discharge
- Easy to Install Diode-Based Design. Ground Wire Not Required
- Insulator Boots for Each Terminal to Prevent Short Circuits
- Improved Heat Sink Design. Corrosion Resistant
- Mount in a well-ventilated location as near to the alternator as possible
- Do not mount on an engine or in proximity to an exhaust manifold
- IP67 Rated; ROHS, CE, Prop65 and ABYC E-11 compliant
- Download sell sheet here.
Download installation manual here.





