Our installation partners offer thirty-year panel performance warranties, ten-year battery and inverter warranties, and an insurance-backed guarantee through IWA. We install through MCS-certified partners.
Who provides the warranties?
All installation work — and all warranties — are provided by our MCS-certified installation partners. We install through MCS-certified partners.
Scottish Energy Efficiency is a matching and consultancy service. We connect you with our installation partner but we do not install equipment or issue warranties ourselves. This distinction matters — it means your guarantees are held by the company that does the work and holds the accreditations.
Workmanship Guarantee
Our installation partners provide a workmanship guarantee covering the quality of the physical installation — roof fixings, wiring, inverter mounting, battery installation, and all electrical connections.
This covers defects arising from the installation work itself, as distinct from the manufacturer warranties on individual components. If a roof bracket loosens, a cable connection fails, or any part of the installation workmanship is found to be defective, your installer puts it right at no cost.
All installations are carried out to MCS MIS 3002 standards and comply with current IET Wiring Regulations (BS 7671).
Manufacturer Warranties
Each major component carries its own manufacturer warranty. These are product warranties from the equipment manufacturer, held through your installation partner.
AIKO Comet 500W
30-year performance guarantee
Panels guaranteed above 90% rated output at year 30, with a linear degradation rate of approximately 0.4% per year. This is an manufacturer product warranty — not a guess.
Hanchu LiFePO4
10-year manufacturer warranty
Lithium iron phosphate chemistry with 95% depth of discharge, rated for approximately 8,000 cycles. That gives a design life of around 22 years at one cycle per day.
Hanchu ESS Hybrid Inverter
10-year manufacturer warranty
Hybrid inverter handling both solar generation and battery management. Single unit, fewer failure points.
Standard System Specification
Unless your survey identifies a reason to specify otherwise, our installation partner fits the following standard equipment:
| Component | Specification | Key Detail |
|---|---|---|
| Solar Panels | AIKO Comet 500W | N-type ABC cells, 30-year performance warranty |
| Inverter | Hanchu ESS Hybrid Inverter | Combined solar + battery management, 10-year warranty |
| Battery | Hanchu LiFePO4 | 95% depth of discharge, ~8,000 cycles, ~22-year design life, 10-year warranty |
| Bird Proofing | Mesh guard system | Fitted as standard on all installations |
Your installer may recommend alternative equipment based on your roof type, shading assessment, or energy usage. Any changes will be discussed and agreed with you before installation.
Insurance-Backed Guarantee
In addition to the direct workmanship guarantee and manufacturer warranties, your installation is covered by an insurance-backed guarantee through the Independent Warranty Association (IWA).
This provides an independent layer of protection. If your installation partner were unable to honour a warranty claim for any reason — including ceasing to trade — the IWA guarantee ensures that the work is still covered.
This is a requirement of TrustMark registration and gives you a level of protection that goes beyond any single company's promise. The IWA is an independent body; it is not controlled by your installer or by Scottish Energy Efficiency.
What Aftercare Includes
Installation is not the end of the service. Here is what ongoing aftercare looks like with our installation partner.
Annual system health check
Your installation partner monitors system performance and checks for faults, degradation, or inverter errors.
Remote monitoring
Generation data is tracked remotely. If output drops below expected levels, your installer investigates — you do not need to spot the problem yourself.
Warranty claims handling
If a component fails under warranty, your installation partner handles the manufacturer claim and arranges the replacement. You deal with one company, not three.
Bird proofing included as standard
Mesh bird proofing is fitted to all panel arrays at installation. This prevents nesting under panels, which is a common cause of wiring damage and reduced airflow.
Complaints Procedure
We take complaints seriously and have a clear, documented process for resolving them. If something is not right with your installation or aftercare, we want to know about it and put it right.
Our full complaints procedure — including timescales, escalation routes, and how to contact us — is set out on a dedicated page.
Guarantees & Aftercare FAQs
Panels typically carry a 25 to 30-year performance warranty, with batteries and inverters covered by 10-year manufacturer warranties. Workmanship is guaranteed separately by the installation partner.
Yes. Installations are covered by an insurance-backed guarantee through the Independent Warranty Association, which remains valid even if the installer ceases to trade.
All warranties are provided by our MCS-certified installation partners, our MCS-certified installation partner. We connect you with them but do not issue warranties ourselves.
Interest-free credit up to £30,000, subject to status.
Last updated: October 2026