Additionally, batteries should be checked semi-annually to ensure they’re functioning in their prime. This should include testing for conductivity or impedance, and performance evaluation as well. This way, you can rest assured that the system will function as it is designed to. UPS System connections should be annually inspected by a professional to ensure they’re in the right placements. Furthermore, simple components yet powerful ones such as capacitors should be replaced every five to seven years. This is due to their function of filtering and smoothing out voltage fluctuations which are essentially the most damaging.