An annual maintenance contract (AMC) keeps your solar inverter serviced on a schedule and gives you priority support when something fails. But AMC pricing is rarely published, and what is actually covered varies enormously. Here is how AMC cost is decided and what you should insist on.
What drives AMC cost
- Number and capacity of inverters at the site
- Whether it is a comprehensive AMC (all parts included) or a non-comprehensive one (only labour and visit)
- Inverter brand and whether spares are easily available
- Site accessibility and how many visits per year are planned
- Response time commitment you expect
Comprehensive vs non-comprehensive AMC
A comprehensive AMC covers scheduled visits plus replacement of most parts, and costs more. A non-comprehensive AMC covers inspection, cleaning and labour only — parts are billed separately. For a single healthy residential inverter, a non-comprehensive plan usually gives the best value. For a commercial plant with several inverters and costly downtime, a comprehensive plan removes surprise bills.
Signs a good AMC is worth the money
- Your plant has more than one inverter or is business-critical
- The site is dusty or exposed and has a history of faults
- You have no in-house team to check generation data regularly
- Downtime directly costs you money or savings
Questions to ask before signing
- How many preventive visits are included?
- Are cleaning, torque checks and insulation testing included?
- What is the response time for a breakdown?
- Are replacement parts included or billed separately?
- Is there a discount if I bundle panel cleaning or O&M?
Frequently asked questions
Is a solar inverter AMC worth it?
For a single small inverter with no fault history, yearly preventive maintenance may be enough. For commercial plants, multi-inverter sites or dusty environments, an AMC usually pays for itself by preventing breakdowns.
How often should an inverter be serviced under an AMC?
Most AMCs include one or two preventive visits a year. Dusty or industrial sites benefit from quarterly attention.
Need a solar inverter repaired?
Share your inverter brand, model and error code — our technicians will guide you and share an estimate before any repair starts.