Off Grid Batteries

Living independently from the National Grid and generating your own electricity brings with it the need for reliable and quality batteries that will charge and store electricity for use when required.

WB Powersource is a family business that has been supplying batteries and related services accessories since the early 1980's, we have a wealth of experience with off grid batteries, please get in touch now for friendly advice and to discuss your particular requirements.

Here is an independent article highlighting the importance of getting the right battery for your Off Grid set up.

Wind Turbine Powering Off Grid Batteries

What is Off Grid?

Off Grid Electrical power is generated by solar, wind, water or a generator. Electricity is then stored in a bank of batteries which in turn are connected via an inverter to the electrical circuits of the property.

An inverter can convert the DC battery power into 230V AC power, suitable to run domestic devices.

Find out more about setting up an off-grid renewable electricity system at the Centre for Alternative Technology website and the Energy Savings Trust website.

Choosing Off Grid Battery

The centre of off-grid systems is the battery store.

A bank of deep-cycle batteries will store electricity when it is generated and provide power for when it is needed.

With proper controls and system design, a battery bank may last five years or more, but it will not last for ever, so you should budget to replace the batteries several times during the life of a system.

The most commonly used voltage is 12 Volts, for which a wide range of lights and appliances are available.

If long cable runs are required or if an inverter of more than 1000 watts is needed then a 24 volt system may be best.

Good 24V lighting and some appliances are available, but most appliances will be run at 240v via the inverter.

Higher voltages (usually multiples of 12) are used in much larger systems and all loads are then inverter powered.

Volt Meter
Example Offgrid Batteries

Sizing the Battery

Off Grid Battery size depends upon power requirements and on the required period of available storage.

This will be affected by climate and weather as well as whether standby power is available.

The amount of electricity stored in a battery is measured in amp hours. The amount of amp hours stored should be sufficient to last several days without any recharging, however batteries should not normally be allowed to lose more than 80% of their charge before being recharged, in order to aid long life.

Sizing is tricky as the amount of wind or solar charging energy can fluctuate subject to the weather, consequently a system that incorporates both wind and solar inputs will require a considerably smaller battery than one with only a single power source.

Other factors such as importance of the loads (resulting in a larger battery store for fail safe operation) and whether seasonal patterns of consumption match seasonal patterns of generation (allowing a smaller battery) are also important.

We are here to give advice, please get in touch to discuss your particular requirements.