What maintenance do church solar panels need?

Full answer

Annual visual inspection: typical scope includes external panel inspection (any visible damage or soiling), inverter status check, isolators tested, monitoring system functional check. Typical time 1-2 hours on site. Cost £200-£450/year. Often combined with the church's quinquennial inspection programme to reduce cost.

Remote monitoring: every modern installation has internet-connected monitoring that detects performance anomalies. Generation drop on a string, inverter fault, communication loss — all trigger automated alerts to the installer/monitoring service. Typical monitoring contract £180-£400/year (often included in first 5 years of new installations).

Inverter replacement at year 12-15: the single planned mid-life intervention. Modern inverters carry 10-12 year warranties; real-world life is typically 12-15 years before efficiency decline or failure triggers replacement. Replacement cost £1,500-£4,500 for parish-scale systems (3-25 kW). Plan this in the long-term parish budget.

Panel cleaning: rarely needed in the UK due to frequent rainfall. Most panels are self-cleaning. Cleaning becomes worthwhile if panels accumulate visible dirt for an extended period (rare except adjacent to construction sites or under heavy bird-roost areas). Cleaning cost when needed £150-£400 per occasion.

Unscheduled repairs: extremely rare for properly-installed systems. Most parish installations operate for their first 12 years with zero unscheduled maintenance beyond routine inspection. Bird-damage to cables, water ingress to junction boxes, lightning damage are the principal unplanned issues, all covered by warranty in most cases.

Related questions

• How much does monitoring cost?
• Do we need to insure the panels?
• What if a panel fails?
• Can the parish maintain the system itself?