Prevention is always recommended over cure. Safety inspection is a service that electricians offer. They check up the system and determine areas where there might be flaws. They will then recommend the necessary cure before it start impacting your bills to the positive. They can do so by repairs or upgrading the system where necessary. One of the service is often to check whether the energy supplied into the system is just enough or excessive to the level that most of it goes to waste.
What affects your system?
As mentioned, it can be very easy to sit back and assume that all is fine with your electrical system.