What is an Inverter?
An inverter takes a 12V Direct Current (DC) input of electricity, usually from battery storage, and changes it 240V alternating current (AC) power output, the same as mains power voltage. This allows household items to be powered from a battery. Inverters are also available to convert 24V or 48V DC into 240V AC, for example where you may have larger battery banks configured in series.
Pure Sine Wave is the Best
There are two types of inverters, modified sine wave and pure sine wave. See the image showing the two types of alternating current curve.
Both types of inverter will power your AC appliances but pure sine wave inverters are high quality (or better than) the power output in your home. Modified sine wave is a simple form of power output adequate for simple electronics but may damage more complex electronics such as computers. In fact, some computers simply will not run off modified sine wave inverters. Modified inverters are best suited for resistive loads which don’t have a start up surge. Pure Sine wave inverters should be used for televisions, laptops, digital microwaves, fridges and other sensitive electronic equipment. In general, because the total harmonic distortion is higher in modified square wave inverters, motors will run hotter (less efficiently, consuming up to 30% more energy than with pure sine wave inverters).
Sale of inverters is a long-standing and competitive market. Beware of unbranded inverters which have very high wattage output and appear to be very good value. There are reports that 75% of unbranded inverters cannot achieve anywhere near the specified power outputs. High power inverters also need very thick DC input power cables, so if they look thin on the images, it’s not likely to be up to the job.
EpEver Pure Sine Wave Inverter – Features:
- Safe design with input and output electrical isolation
- Adoption of advanced SPWM technology, pure sine wave output
- Optional output voltage 220 or 230VAC by using DIP switch
- LED indicators for fault status and working status
- Lower No-load consumption
- Max. efficiency up to 95%(IP2000-22, IP2000-42)①
- Input protection: Over voltage protection, low voltage protection
- Output protection: Overload protection, short circuit protection
- Over temperature protection: Temperature-controlled Fan Ventilation;
- Inverter turns off automatically when overheating
- Working Temperature: -20 to 45 deg C
- Storage Temperature: -35 to 70 deg C
- Humidity: <95% (NC)
- Enclosure: IP20
- Altitude: <5000m
Technical Specification – 1500W, 12V Model
- Rated Input Voltage: 12V DC
- Input Voltage Range: 10.8 – 16V DC
- Input surge voltage: <20V DC
- Output Voltage: 220V AC (+/-5%) or 230V AC (+7% to -5%)
- Output Socket: universal, accepts UK plugs
- Output Frequency: 50 or 60 ±0.1Hz:
- Output Continuous Power: 1200W
- Output Power 15 min: 1500W
- Surge power: 2400W
- Power Factor: 0.2 to 1
- Output Wave: Pure sine wave
- Distortion THD: <3%
- Max. Efficiency: 94%
- No-load current: <0.6A
- DC connection: M6 clamp nut
- Overall dimension: 284.7 x 231.5 x 98.5mm
- Mounting dimension: 220 x 163mm
- Mounting hole size: 5.5mm
- Net weight: 4.6Kg
- Input cable: min 20mm2 conductor area normally using 2X10mm2 cables to both positive and negative terminals, max cable length to battery: 2 metres to reduce cable voltage drop.
Note: input cable is not included due to variable lengths which may be required to suit the installation. See specification for cable sizing. The cable will need ‘crimp ring terminals’ to take min 10mm2 cable for connection between the battery and the inverter input.