Sterling Power Inverters | 12V Pure & Quasi Sine Wave Inverters

Sterling Power inverters convert 12V or 24V DC battery power into 230V AC mains electricity, allowing caravan and motorhome owners to run household appliances without hookup connection. The company manufactures both pure sine wave and quasi sine wave inverters in power ratings from 100W up to 5000W, designed for marine, recreational vehicle, and off-grid applications. Pure sine wave inverters produce smooth AC current identical to mains electricity, making them suitable for sensitive electronics including laptops, televisions, medical equipment, and modern appliances with electronic controls. Quasi sine wave inverters produce a modified stepped waveform that works reliably with most resistive loads like kettles, power tools, and lighting, whilst costing significantly less than pure sine wave models. Sterling's Pro Power Q quasi sine wave range includes built-in RCD protection options for UK building site compliance, whilst the PS Series pure sine wave inverters feature advanced high-frequency technology with efficiency ratings exceeding 90 percent. The inverters include multiple protection systems covering overload, over-voltage, under-voltage, over-temperature, and short circuit conditions, with automatic shutdown and restart once fault conditions clear. Models are available in 12V, 24V, and 48V DC input voltages to match different battery bank configurations, with continuous power ratings clearly stated alongside peak surge capacity for starting inductive loads like compressors and pumps.

Sterling inverters are particularly popular with motorhome owners upgrading to induction hob cooking, which requires at least 2000W continuous power to operate twin-ring hobs reliably. A typical Sterling 1800W quasi sine inverter draws approximately 150A from a 12V battery at full load, requiring substantial battery capacity and proper cable sizing with minimum 50mm² cables kept under 1.5m length for high-power installations. The Pro Power Q range includes remote control options allowing the inverter to be mounted in a secure location whilst operation is controlled from the living area, with LED indicators showing input voltage, output status, and fault conditions. Sterling's inverter technology uses modern high-frequency switching rather than older heavy transformer designs, resulting in compact lightweight units that generate less waste heat. The soft-start feature gradually ramps up output when switched on, preventing voltage spikes that can damage sensitive equipment. Most Sterling inverters include USB charging ports rated at 2.4A for convenient phone and tablet charging without needing to run the main inverter output. The cooling fans are temperature-controlled, operating only when needed to extend component life and reduce noise. Sterling inverters work with all leisure battery types including flooded lead acid, AGM, gel, and lithium, though lithium batteries handle the high discharge currents required for inverter operation much better than traditional lead acid batteries which should not be discharged faster than 20 percent of their amp hour capacity.

Typical users include campervan converters installing all-electric cooking systems, motorhome owners wanting to run laptops and charging equipment off-grid, and mobile workshop operators requiring power tools away from mains supply. Installation requires proper fusing at the battery with fuse ratings matched to the maximum current draw - a 2000W 12V inverter needs a 200A fuse or circuit breaker located within 300mm of the battery positive terminal. One consideration with quasi sine wave inverters is that some modern appliances with switch-mode power supplies may not operate correctly, and audio equipment can produce annoying hum from the stepped waveform. Microwave ovens often specify higher input power than output cooking power - a 700W microwave typically requires 1200W input, so inverter sizing must account for this. Sterling provides detailed power calculation guides with their inverters to help customers select appropriate models. The company recommends pure sine wave inverters for extended off-grid living, though quasi sine models work fine for occasional use or simple resistive loads. Sterling inverters carry two-year warranties with technical support available for sizing, installation advice, and troubleshooting. The combination of multiple power ratings, both waveform types, and various voltage options makes Sterling inverters suitable for applications from basic phone charging in a campervan to running complete household loads in a large motorhome.