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Welcome to Sterling Power USA
Whether you're a recreational or professional consumer, we can help with your battery charging and condition needs. Sterling Power USA specializes in Marine, RV, and Industrial battery charging solutions. Our marine grade battery chargers like our new ProCharge Ultra are award winning, high performance battery charging solutions. With our battery charging products you can decrease run time, maximize charging speeds and provide your batteries the correct charging profiles. Doing so maximize battery performance and battery life. Your batteries are an expensive investment, be sure you are charging them correctly. Providing the correct charge voltage for your battery is easy with innovative battery charging products like our newest marine grade battery charger, the ProCharge Ultra. With 11 pre-set battery charging profiles, and one user customizable setting, this battery charger can be set to charge all types of 12v and 24v batteries. 
Not near shore power? Why wait to plug in your battery charger until you get home? With unique battery charging products like the Sterling Power "Battery to Battery Charger" or the "Alternator to Battery Charger", you can provide a multistage charge to the auxilliary batteries while the boat or vehicle is running, away from shore power.
Other Sterling Power Products we offfer include IP68 marine battery chargers, drymount marine battery chargers, marine battery isolators, zero volt drop battery charging systems, advanced alternator regulators, Amp Hour Counters, DC powered battery chargers, IP68 waterproof battery charging relays and combination inverter chargers. Our battery charging solutions can meet the power demands being placed on your vessel today.
Our parent company, Sterling Power Products, Ltd., manufactures many different lines of battery chargers, marine battery chargers, power inverters, battery charging relays, marine battery isolators and AC/DC power management products and accessories. We've been designing and manufacturing power products for almost 20 years in the UK, and recently launched Sterling Power USA to better serve our customers in the United States. Sterling Power USA is poised to become North America’s leading supplier of electrical power management products for use in marine pleasure craft, and recreational and emergency mobile vehicles, off gridders --anywhere control of electrical power is needed.
At Sterling Power USA, we have a customer-driven approach to product development. We listen to your needs and use this to continually create and change our battery charging product line to make what you, our customer, is looking for. We believe in offering practical solutions that offer great value for your money. Our products have seen service in the marine market, the RV motor home market & the emergency vehicle market. Sterling Power USA has the AC and DC power management products to keep it all running safely.
We value your business and we are here to help. Please feel free to contact us if we can be of assistance. Product manuals, wiring diagrams and literature section of our website:

Featured Product

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ProReg-D 12 Volt / 24 Volt Advanced Alternator Regulator
Price: $181.00
ProReg-D 12 Volt / 24 Volt Advanced Alternator Regulator
Enhance your alternator's charge rate! Sterling Power Advanced Alternator Regulators changes the standard output of your alternator into a four step charge profile. For use w/ higher current alternators. Includes Alternator temp & battery temp sensors.
12 Volt 130 Amp Alternator-to-Battery Charger
Price: $396.00
12 Volt 130 Amp Alternator-to-Battery Charger
Charge your batteries up to 5 times faster and extend their life at the same time with a Sterling Power USA 12 volt, 130 amp alternator to battery charger
12 Volt - 24 Volt 50 Amp Battery to Battery Charger
Price: $419.00
12 Volt - 24 Volt 50 Amp Battery to Battery Charger
Charge your auxiliary battery bank with the correct multistage, temperature compensated charging curve by using the input power of any vehicles start battery automatically while the vehicle is running.
ProSplit-R Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 2 Output)
Price: $152.00
ProSplit-R Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 2 Output)
Sterling Power USA ProSplit-R 122, Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 2 Output)
DC / AC Clamp on Volt and Amp Meter - great for reading DC levels on your boat battery
Price: $129.00
DC / AC Clamp on Volt and Amp Meter - great for reading DC levels on your boat battery
ProClamp - A/C & D/C Clamp Meter
ProDiagnostics - Digital Wind-up Multimeter
Price: $106.00
ProDiagnostics - Digital Wind-up Multimeter
Windup Multimeter - No Batteries Needed
Sterling Power USA - Remote Control for ProCharge Ultra - The Ultimate Battery Charger
Price: $63.00
Sterling Power USA - Remote Control for ProCharge Ultra - The Ultimate Battery Charger
Remote Control and Display for the ProCharge Ultra Line of Battery Chargers
Sterling Power USA- Waterproof 20 amp, 1 Bank Marine Battery Charger
Price: $226
Sterling Power USA- Waterproof 20 amp, 1 Bank Marine Battery Charger
The Aqua-nautic line of IP68 Marine Battery Chargers Delivers Great Power Factor Corrected Performance, at a Great Price-
Sterling Power USA- Waterproof 20 amp, 2 Bank Marine Battery Charger
Price: $258.00
Sterling Power USA- Waterproof 20 amp, 2 Bank Marine Battery Charger
The Aqua-nautic line of IP68 Marine Battery Chargers Delivers Great Power Factor Corrected Performance, at a Great Price-
Sterling Power USA- Waterproof 20 amp, 3 Bank Marine Battery Charger
Price: $278.00
Sterling Power USA- Waterproof 20 amp, 3 Bank Marine Battery Charger
The Aqua-nautic line of IP68 Marine Battery Chargers Delivers Great Power Factor Corrected Performance, at a Great Price-
ProCharge-B : IP68 waterproof onboard echo charger. 12 Volt input to 24 Volt output on-the-water charger
Price: $298.00
ProCharge-B : IP68 waterproof onboard echo charger. 12 Volt input to 24 Volt output on-the-water charger
Why wait to arrive at your destination to plug in your battery charger? With the Sterling Power “ProCharge-B” onboard charger you can provide true multi-stage charging to an auxiliary bank of batteries by using any running vehicles start battery
ProCharge-B : IP68 waterproof onboard battery to battery charger. 12 Volt input to 12 Volt output echo battery charger
Price: $298.00
ProCharge-B : IP68 waterproof onboard battery to battery charger. 12 Volt input to 12 Volt output echo battery charger
Why wait to arrive at your destination to plug in your battery charger? With the Sterling Power “ProCharge-B” echo onboard smart charger you can provide true multi-stage charging to an auxiliary bank of batteries from any 12v starting battery source.
ProCharge-B : IP68 waterproof onboard echo charger. 12 Volt input to 36 Volt output on-the-water charger
Price: $298.00
ProCharge-B : IP68 waterproof onboard echo charger. 12 Volt input to 36 Volt output on-the-water charger
Why wait to arrive at your destination to plug in your battery charger? With the Sterling Power “ProCharge-B” onboard charger you can provide true multi-stage charging to an auxiliary bank of batteries by using any running vehicles start battery
ProSplit-R Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 3 Output)
Price: $170.00
ProSplit-R Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 3 Output)
Sterling Power USA ProSplit R 123 Zero Volt Drop Marine Battery Isolator - Intelligent Digital Alternator Distribution System (12V, 120 Amp, 3 Output)
Battery Monitor- Sterling Power Management Display Including One 200 Amp Shunt
Price: $273.00
Battery Monitor- Sterling Power Management Display Including One 200 Amp Shunt
Battery Monitor- Sterling Power Management Remote Display Including One 200 Amp Shunt - Monitor amps in and out and the voltages of your battery banks.
Sterling Power ProCombi-Q - Quasi Sine Wave Combination Inverter Charger - 12 volt, 2500w, 120vac, 60 Hertz for American use
Price: $1,107.00
Sterling Power ProCombi-Q - Quasi Sine Wave Combination Inverter Charger - 12 volt, 2500w, 120vac, 60 Hertz for American use
Voted "best buy" in Sailing Today Combi test, March 2008. The Combi-Q is our modified or quasi-sine wave interverter / battery charger.
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 140 Amp)
Price: $145.00
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 140 Amp)
ProConnect CVSR -140amp - Current and Voltage Sensitive Relay -12v or 24v autosense
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 210Amp)
Price: $195.00
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 210Amp)
ProConnect CVSR -210amp - Current and Voltage Sensitive Relay -12v or 24v autosense
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 280Amp)
Price: $215.00
ProConnect- CVSR - Current Limiting Voltage Sensitive Relay (12V or 24V autosense, 280Amp)
ProConnect CVSR -280amp - Current and Voltage Sensitive Relay -12v or 24v autosense
ProConnect- IF - Ignition Feed Relay (12V, 80 Amp)
Price: $60.00
ProConnect- IF - Ignition Feed Relay (12V, 80 Amp)
ProConnect IF - Ignition Feed Relay. 80amp, 12v model
ProConnect- IF - Ignition Feed Relay (12V, 160 Amp)
Price: $75.00
ProConnect- IF - Ignition Feed Relay (12V, 160 Amp)
ProConnect IF - Ignition Feed Relay. 160amp, 12v model
ProConnect- IF - Ignition Feed Relay (12V, 240 Amp)
Price: $97.00
ProConnect- IF - Ignition Feed Relay (12V, 240 Amp)
ProConnect IF - Ignition Feed Relay. 240amp, 12v model
ProConnect- IF - Ignition Feed Relay (24V, 100 Amp)
Price: $75.00
ProConnect- IF - Ignition Feed Relay (24V, 100 Amp)
ProConnect IF - Ignition Feed Relay. 100amp, 24v model
ProConnect- IF - Ignition Feed Relay (24V, 150 Amp)
Price: $97.00
ProConnect- IF - Ignition Feed Relay (24V, 150 Amp)
ProConnect IF - Ignition Feed Relay. 150amp, 24v model
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 80 Amp)
Price: $129.00
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 80 Amp)
ProLatch-R -80amp model - 0 volt drop, Programmable Latching Relay -12v or 24v autosense
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 160 Amp)
Price: $179.00
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 160 Amp)
ProLatch-R -160 amp model - 0 volt drop, Programmable Latching Relay -12v or 24v autosense
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 240 Amp)
Price: $214.00
ProLatch-R- Zero Volt drop, Programmable Latching Relay (12V or 24V autosense, 240 Amp)
ProLatch-R -240 amp model - 0 volt drop, Programmable Latching Relay -12v or 24v autosense
ProLatch-R- Optional Remote
Price: $109.00
ProLatch-R- Optional Remote
ProLatch-R -240 amp model - 0 volt drop, Programmable Latching Relay -12v or 24v autosense
Sterling Power Pro Charge Ultra - 12 Volt, 20 Amp Marine Battery Charger - 3 Bank Battery Charger
Price: $345.00
Sterling Power Pro Charge Ultra - 12 Volt, 20 Amp Marine Battery Charger - 3 Bank Battery Charger
The new Sterling ProCharge Ultra. The Ultimate Marine Grade Battery charger. Delivers great performance, features and value.
Sterling Power Pro Charge Ultra Power Factor Corrected Battery Charger - 12 Volt, 30 Amp, 3 bank Marine Battery Charger
Price: $398.00
Sterling Power Pro Charge Ultra Power Factor Corrected Battery Charger - 12 Volt, 30 Amp, 3 bank Marine Battery Charger
The new Sterling Pro Charge Ultra Battery Charger. The Ultimate Marine Grade Battery charger. Power Factor Corrected Charger is super efficent. Delivers great performance, features and value.
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