“…In contrast, in individual PV or wind systems, the equipment is installed in households; therefore, the link between users and operation and maintenance tasks is stronger, and users are forced to strengthen their technical knowledge to minimise the risk of breakdowns. In fact, the analysed microgrid systems have proven to be more reliable and provide better quality service to users, especially the microhydro scheme, because operators can more easily perform operation and maintenance tasks in centralised systems (Millinger et al, 2012). A greater number of failures were found in individual systems, often due to a lack of user training, which increases operation and maintenance costs and reduces users' confidence in the systems and willingness to pay, ultimately reducing the sustainability of the systems.…”