Many situations exist where a small amount of reliable power is needed and this can easily be provided using wind or solar battery charging systems combined with an inverter to power conventional 230Vac appliances, allowing an economical alternative to bringing in the mains.
In every case the first requirement is to evaluate the conditions at the proposed site and to realistically assess anticipated load requirements. Keeping those load (energy) requirements to a minimum, keeps costs to a minimum and helps make any system perform at it’s best.
If loads are critical then a careful load analysis must first be done
(see Off-Grid Sizing).
Alternatively flexible systems can be designed which can be added to, as budget allows or needs change
How well anything will work depends firstly upon what local wind and solar resources will permit and secondly on how carefully energy captured can be utilised.
For situations where seasonal use is expected a good match may be found between potential generation and energy use. eg. Holiday homes may be used most in the summer and be in sunny places and so a PV system will be the ideal solution. Lighting systems in remote buildings with winter winds are perfect situations for wind turbines.
Combined wind and solar generation allows a consistant power supply throughout the year and allows more flexibility - though a site with wind power potential is an essential. Using electricity efficiently and conserving power when not required or when weather conditions are unfavourable ensures the maximum potential can be obtained from such systems.
All sorts of applications are feasible: from remote villas to mobile phone telemetry systems.