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Off-Grid Power Inverters - DC to AC Inverters

Victron off-grid power inverter - mains power anywhere...

Off-Grid Mains Power Inverters - An Introduction

Off-grid inverters convert battery power (12V or 24V DC) to mains power (230/240V AC). They are very convenient, as they allow the use of standard "mains" appliances on a DC (battery) system.

Inverters are great for powering devices such as washing machines, power tools and vacuum cleaners, which tend to have shorter running times, or are only used occasionally. However, on smaller systems, due to the standby and internal power losses in even the most efficient inverters, regular loads with long running times such as lighting and refrigeration are often best run direct from DC.

Some off-grid inverters can be fitted with remote switches so that they can be turned off easily when not in use. For maximum inverter efficiency, it's recommended to try and match the inverter rated power to the power draw of the devices to be run.

Most high quality inverters feature a battery protection circuit which is designed to shut off the inverter if the battery voltage gets too low. This prevents the batteries from being damaged by over-discharge.

Power inverters are very useful in vehicles, as they provide a totally independent mains power supply. In this situation, we recommend that clients consider having a second battery and split charger unit fitted to the vehicle to handle the extra power draw.

Larger off-grid inverters are also available with built-in battery chargers. These units are called Inverter Chargers (surprisingly enough). These are great for occasional topping up from the mains or from a generator.

Outback FX Series off-grid inverter charger

Modified Sine Wave or True Sine Wave ?

There are two main types of off-grid DC to AC inverter – Modified Sine Wave (aka Quasi Sine) and True Sine Wave. Modified sine inverters are cheaper, but the power is a little rough. This can occasionally produce problems with some devices, such as TV's and stereos.

True sine wave inverters produce exceptionally high quality power, and run all types of equipment. At we don't sell the 'modified' sine wave type.

Why Do Inverter Prices Vary So Much ?

The difference between a cheap inverter and the expensive ones is that the cheaper ones normally use  'MOFSET' transistors, whilst the expensive ones use a 'toroidal' transformer. The toroidal inverters have a much better surge (peak power) ability, and generally last longer - however the copper used on the toroid pushes the price (& weight) up significantly.

Our Off-Grid Inverter Range

Victron inverters Victron Phoenix Inverters - 12V, 24V or 48V input, true sinewave, rugged design from 180VA to 5000VA.

Victron inverters Outback Inverter Chargers - 12V, 24V or 48V input, true sinewave, built-in battery chargers, 2000 to 2300VA.

Solon power inverters Solon Inverters (Ex ASP) - 12V, 24V or 48V input, true sinewave, industrial inverters from 150VA to 3400VA.

We also supply solar pv panels, small wind turbines, deep-cycle batteries, solar pv controllers and a wide range of accessories.

Solon industrial dc to ac power inverters Outback off-grid inverter chargers Victron energy off-grid power inverters

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