Chargers, Inverters, and Alternators

ROKK wireless charger for flush (hidden) installation, specifically designed for marine use. It allows you to charge your smartphone simply by placing it on the marked pad – no cables needed. The charger is Qi-certified and provides fast charging up to 10W. It installs out of sight under a surface (e.g. beneath a countertop or console), leaving only a thin non-slip ring visible on top to indicate where to put your phone. The unit is fully waterproof (IPX6), ideal for exposed decks and wet environments. Operates on 12V or 24V boat power.

• Wireless Charging: Qi-compatible – charges phones and devices cable-free, 10W power output
• Hidden Mount: Installs beneath the surface – preserves clean design; only a guide ring on top
• Waterproof: IPX6 rated – resistant to heavy spray and rain, perfect for deck or cockpit use
• 12/24V Input: Connects directly to boat’s 12V or 24V system, with built-in surge protection
• Marine-Grade Design: Vibration-proof and UV-resistant, with a non-slip surface to keep devices in place underway

The Automatic Charging Relay (Voltage Sensitive Relay - VSR) intelligently connects two battery banks during charging and isolates them when charging stops, ensuring your starting battery is always topped up. Ideal for boats with dual battery systems, it prevents dead batteries and the risk of getting stranded. This compact and robust unit is fully waterproof and ensures safe, efficient management of your onboard charging system.

• High Current: 125A continuous (140A peak) capacity – handles high alternator and charger outputs with ease.
• Automatic Operation: Engages at 13.3V to combine batteries for charging, and disconnects at 12.8V to prevent over-discharge – all automatic with no manual switching.
• Durable Protection: Fully sealed to IP67 and CE certified – impervious to water, salt, and shocks for reliable marine use.
• Low Draw: Ultra-low standby draw (10 mA) – won’t drain your batteries when the engine is off.
• Easy Installation: Compact 69 x 69 mm module with a rugged build – mounts conveniently near batteries or battery switches.

This High Voltage Protection Device safeguards your boat’s electrical system from dangerous surges or over-voltage conditions on a 230V AC supply. It connects inline with shore power, generator, or inverter input and automatically disconnects the power if voltage goes outside safe limits, thus protecting sensitive onboard electronics from damage. A must-have safety addition for any yacht or RV that plugs into unreliable power sources.

• Over-Voltage Guard: Continuously monitors AC line voltage and cuts off the output if voltage spikes too high or fluctuates beyond safe range.
• Versatile Use: Suitable for use with dockside shore power, onboard generators, or inverters – protects air conditioners, battery chargers, appliances, and more.
• Marine-Grade Build: Sturdy housing designed for onboard installation (approx. 155 x 170 x 118 mm). Built to withstand marine vibrations, humidity, and salt air.
• Easy Installation: Wired between the 230V input source and the vessel’s AC distribution – operates automatically with no user adjustments needed.
• Safety First: Prevents potential regulator “welding” or equipment failure due to faulty marina power. Enhances crew safety by avoiding electrical hazards and prolongs the life of your AC equipment.

The Pro Charge Ultra Lite is a high-performance 30A battery charger delivering fast and precise charging for your onboard batteries. With over 90% efficiency and a universal 80-270VAC input, this charger can be used worldwide – perfect for global cruising or RV travel. It supports 8 pre-programmed charging modes for different battery types (AGM, Gel, Flooded Lead Acid, Calcium, LiFePO4, etc.) and features a special night mode for quiet operation. Compact, lightweight, and reliable – it keeps your electrical system charged up and your batteries healthy.

• Wide AC Input: Operates from 80 to 270V AC (40-70Hz) – handles any global voltage without the need for a separate transformer, great for travel and generator power.
• Multi-Stage Charging: 8 charging profiles covering all common 12V battery types, including lithium (LiFePO4) – ensures the optimal charge algorithm for maximum battery life and performance.
• High Efficiency: >90% efficiency – very little energy wasted as heat. This means faster charging even under lower input voltages and less strain on your power source.
• Dual Outputs: Charges two separate battery banks at once (e.g., engine and house batteries), automatically distributing charge as each bank needs.
• Quiet Night Mode: Built-in half-power mode that reduces output (and fan noise) during a set period – enjoy quiet nights aboard without the hum of a running charger.

A high-quality marine inverter with pure sine wave output, available in 600W and 1000W models, designed to power sensitive onboard appliances with grid-quality electricity. This inverter converts your 12V battery into stable 230V AC, allowing you to run devices like laptops, TVs, microwaves, or chargers on your boat just as you would at home. It features dual AC outlets (European Schuko and UK) and an integrated RCD (ground fault circuit breaker) for maximum safety. With a rugged design and configurable grounding, it’s perfectly suited for marine environments.

• True Sine Wave: Delivers a clean sine wave output – safe for all types of equipment, including sensitive electronics, with no risk of interference or damage that modified wave inverters might cause.
• Two Models: 600W (for smaller loads) and 1000W (for heavier appliances) – choose based on your power needs. Both models offer high surge capacity to handle start-up currents of devices.
• Dual Outlets & RCD: Equipped with both a Euro Schuko and a UK-style AC outlet, capable of 230V (and 110V if required). Built-in RCD (residual current device) adds safety by preventing electric shocks, especially important in damp marine conditions.
• Marine-Ready Design: Provides option for neutral-ground bonding or floating ground (selectable) to integrate properly with yacht electrical systems. Gold-plated terminals and high-quality components ensure minimal loss and reliable operation.
• Quiet Cooling: Features an upgraded large cooling fan that runs efficiently at lower RPM – meaning quieter operation even under load.

The Pro Power Q series offers affordable modified sine wave inverters, providing reliable 12V to 230V power conversion for most household devices on board. They are the budget-friendly solution to power up about 95% of appliances – perfect for those who want shore-like comforts at a lower cost. The range spans from small 150W units (for laptops and chargers) to powerful 2000+ W units (for tools and high-draw appliances). All models feature dual AC outlets (EU and UK style) and provide 230V 50Hz (and 110V 50Hz) output through built-in sockets. Gold-plated connectors, a large cooling fan, and overload protections make these inverters a dependable choice for a wide variety of uses.

• Modified Sine Wave: Compatible with ~95% of appliances – suitable for hairdryers, laptop adapters, phone chargers, TVs, microwaves, etc. (not recommended only for certain devices with thyristor controls like washing machines or bread makers).
• Cost-Effective: Priced around half of equivalent pure sine inverters, making it excellent for those on a budget or for infrequent AC power needs on board.
• 230V/110V Outputs: Each inverter in the series includes combined European and UK outlets, allowing you to plug in standard 230V plugs or UK/US type plugs (110V) – offering flexibility for international usage.
• Economy Mode: The built-in fan and control circuitry optimize efficiency – under low loads the inverter runs almost silently, even entering a power-saving mode (about half consumption) when no load is detected.
• Rugged & Protected: Aluminum casing with full protections against short-circuit, overload, and overheating. Easy to install with battery cables (models up to 300W come with a car lighter plug; higher wattages include cable leads for direct battery connection).

This remote panel allows full monitoring and control of your Sterling Pro Charge Ultra battery charger from a convenient location – perfect for mounting at the helm or in the cabin. Featuring a clear LED/LCD display, the panel shows real-time charging voltage, current, the selected battery type, charger/battery temperature, and any error messages. With the included 10-meter cable, you have the flexibility to install it wherever you need for easy viewing. Three mounting options (surface, flush, or semi-flush) let it seamlessly integrate into any dashboard.

• Remote Monitoring: Keep an eye on your battery charging without going below deck – voltage (V) and current (A) are continuously displayed, along with charge status (bulk, absorption, float).
• Full Control: Use the remote to adjust settings such as charging mode or battery profile, activate “night mode” for silent charging, or turn the charger on/off as needed – all from a distance.
• Alarms & Indicators: In case of any issue (overheat, sensor fault, etc.), the panel displays error codes or warnings – enabling you to respond quickly to any charger or battery problems.
• Easy Installation: Panel size is about 110 x 68 mm – compact yet easy to read. A 10 m cable (extendable if necessary) with plug-and-play connectors is included – simply connect it to the charger. The panel can be surface-mounted or flush-mounted for a clean look on your console.
• Added Convenience: Ideal for larger boats and yachts – monitor your battery status from the salon or helm, without needing to access the charger in the engine room every time.

The Pro Charge Ultra is Sterling’s flagship line of intelligent marine battery chargers, available in 12V models from 10A up to 60A. With a broad input range 80–270VAC 40-70Hz and a 5-year warranty, these chargers operate anywhere in the world and are built for long-term reliability. They feature up to 3 outputs to simultaneously support multiple battery banks, an integrated temperature sensor, and 11 charging profiles (incl. AGM, Gel, Traction, Lithium, etc.). A 32-LED display on the front panel shows voltage, current, and status for easy monitoring. These chargers can also be linked in parallel or series with others in the range to achieve higher charging currents or to create 24V systems.

• Global AC Input: Accepts 80-270V AC at 40-70Hz – no transformer or manual switching needed, perfect for travel and for use with generators that have fluctuating voltage.
• Multi-Bank Outputs: 3 charging outputs – automatically distributes current to up to three separate battery banks (e.g., engine, house, and auxiliary) without the need for diode isolators.
• Smart Charging: 11 preset charging programs + a custom setting – optimal charging for Flooded, AGM, GEL, Calcium, and LiFePO4 batteries. Supports 4-stage charging (including desulfation/equalization function for lead-acids).
• LED Display & Indicators: Bright 32-LED panel provides readouts of voltage, charging current (as % power), and mode. The LED bar graph makes it easy to see status at a glance, even in daylight.
• High Reliability: Temperature-controlled fan cooling, full protections against overheating, reverse polarity, and short-circuit. Durable marine-grade casing, modular design for serviceability. Backed by a 5-year warranty – a testament to its quality and durability.

This compact 5A portable charger is perfect for maintaining and charging 12-volt batteries in boats, cars, motorcycles, or RVs. It’s compatible with all types of lead-acid batteries – wet/flooded, AGM, GEL, calcium – and automatically applies a 3-stage charge (Bulk, Absorption, Float) to maximize battery life. It features three operating modes and smart functions: a soft start for deeply discharged batteries, a half-power mode for small batteries (<30Ah), as well as battery condition diagnostics. The universal input (100-240V AC) allows you to use it anywhere in the world. The charger is rated IP45 (protected against dust and splashing water) and has LED indicators plus touch-control buttons for easy operation.

• Universal Use: Suitable for lead-acid batteries including flooded, AGM, GEL, VRLA, and calcium types from about 10Ah up to ~120Ah. Ideal for boat batteries, car batteries, ATVs, solar systems, and more.
• Automatic Smart Charging: 3-stage charging with maintenance mode – the charger monitors the battery and stops when fully charged, and can be left connected indefinitely to float without overcharging.
• Special Modes: Half-power (50%) setting for small capacities – reduces current to safely charge motorcycle and small batteries. Soft Start – if a battery is heavily discharged, it begins with a low current until voltage rises to a safe level. Desulfation pulse – detects sulfated batteries and attempts to revive them with a pulsing charge.
• Safe and Protected: IP45-rated enclosure, resistant to dust and light water splashes. Built-in protections against reverse polarity, short circuit, and overheating. Certified to EN60335 & EN55014 standards for electrical safety and EMC.
• Easy to Use: Three illuminated indicators show charging status (Charging, Full, Maintenance). One-touch mode selection (Normal / Small Battery / Supply mode). Compact size (150×60×30 mm) and weight only ~0.4 kg – convenient to carry and store.