Most manufacturers recommend a yearly maintenance be performed by an authorized dealer. Likely it will be something along these lines: –Test the batteries –Check all electrical connections –wipe out track and gear rack –regrease gear rack – make sure all bolts and screws are tight –check any moving parts such as wheels etc. This takes us about 10 minutes and we charge a standard service call fee. The most common issue is that the batteries need replaced every 3-5 years. Some last much longer, but I would say that is good ballpark. We charge $100 for a set of batteries installed.