Energy management issues
Electric loads in remote, cold-climate areas have traditionally been powered by diesel and gas generators or primary batteries. However, increasingly renewable-energy technologies such as photovoltaics or wind turbines are being used to supply part or all of the energy needs of the loads. PV is particularly attractive since it requires little maintenance and no exterior energy source. However, because of the variable nature of the solar resource, a PV array, unlike a genset, cannot produce power on demand. The energy produced by stand-alone PV systems usually needs to be stored to ensure that power is available to be called upon when needed – this complicates and constrains the energy management strategy.