Solar Panel & Battery Warranties — Spectrum Energy Systems

Solar Panel & Battery Storage Warranties

Q: What does Spectrum's workmanship warranty cover?

Spectrum's workmanship warranty runs for 5 years from commissioning. It covers the physical install work: roof penetrations, mounting, weatherproofing, electrical connections, consumer-unit modifications and commissioning. Equipment defects are covered separately by manufacturer warranties. Design issues are protected by our £1M professional indemnity insurance, and an insurance-backed guarantee from QANW provides additional cover if the original installer is unable to honour the workmanship warranty.

Q: What inverter warranties are available?

Solis (our default) carries 5 years standard with paid extensions to 10 or 20 years total cover. SolarEdge provides 12 years on inverters and 25 years on power optimisers, with paid extensions available. Sunsynk inverters supplied on customer request carry a 10-year standard warranty. All inverter warranties cover manufacturing defects and workmanship.

Q: What insurance does Spectrum carry?

Spectrum carries £10 million Employer's Liability, £5 million Public Liability and £1 million Professional Indemnity, all underwritten by QBE UK Ltd (A-rated). Professional Indemnity covers any design-related issues that prove defective or fail to perform as specified.

Multi-layered protection on every Spectrum installation: our 5-year workmanship warranty, an insurance-backed guarantee from QANW, full liability insurance underwritten by QBE UK, and tier-one manufacturer cover lasting up to 30 years.

We've been installing solar across the East Midlands since 2011. Every install is MCS-accredited, RECC-registered and signed off by NICEIC-certified electricians. We also manage every manufacturer warranty claim on your behalf for the lifetime of the system.

5-Year Workmanship Warranty

Covers our installation work (roof penetrations, mounting, weatherproofing, electrical connections and commissioning) from the day we hand the system over.

£10M / £5M / £1M Insurance

£10M Employer's Liability, £5M Public Liability and £1M Professional Indemnity, all underwritten by QBE UK Ltd (A-rated).

QANW Insurance-Backed Guarantee

An IBG sits behind the workmanship warranty: if for any reason Spectrum can't honour it, QANW does. Issued within 30 days of commissioning under the MCS scheme.

Manufacturer Claim Management

We coordinate every manufacturer warranty claim on your behalf, including paperwork, replacements and re-installation. You only talk to us.

How Your System Is Protected

A solar installation has three things that can go wrong: the workmanship, the design, and the equipment. Each is covered by a different mechanism, and as your installer we coordinate all three on your behalf.

Spectrum Workmanship Warranty (5 Years)

This is our cover on the physical installation work performed by our MCS-accredited engineers and NICEIC-certified electricians. It runs for 5 years from commissioning and covers:

Roof integrity: roof penetrations, mounting systems and weatherproofing. If something we installed causes property damage through our workmanship (a non-watertight tile, for example), that's on us.
Electrical installation: wiring, connections, consumer-unit modifications and electrical integration.
Commissioning: system configuration, testing, handover documentation, MCS certificate and DNO sign-off.

Behind the workmanship warranty sits an Insurance-Backed Guarantee from QANW, mandatory under the MCS scheme. If Spectrum can't honour the workmanship warranty for any reason (including ceasing to trade), the IBG provider does, for the remainder of the cover period. Issued automatically within 30 days of commissioning at no extra cost to you.

System design is covered separately by our £1M Professional Indemnity insurance with QBE UK Ltd. If anything we designed proves defective or fails to perform as specified, you're covered.

Equipment defects (faulty panels, inverters or batteries) are covered by the relevant manufacturer warranty, detailed below.

The Three Cover Layers in Plain English

Spectrum Workmanship Warranty (5 years): covers the install work itself. If we did it wrong, we fix it.

QANW Insurance-Backed Guarantee: a safety-net behind the workmanship warranty. Continues if we can't.

QBE Professional Indemnity (£1M): covers system design. If the design we produced doesn't perform as specified, this picks up the cost.

Manufacturer Equipment Warranties (5-30 years): cover product defects. We manage the claims for you.

Complete Warranty Coverage Summary

Component	Manufacturer	Warranty Period	What's Covered	Extension Options
Solar Panels	JA Solar (DeepBlue 4.0)	12-yr product / 30-yr performance	Materials, workmanship, ~87% retention at year 30	Standard cover
Solar Panels	Aiko (N-type ABC)	15-yr product / 30-yr performance	Materials, workmanship, ~88.85% retention at year 30	Standard cover
Solar Panels	LONGi (Hi-MO 6 / X6)	15-yr product / 30-yr performance	Materials, workmanship, ~87.4% retention at year 30	Standard cover
Hybrid Inverter (default)	Solis	5 years standard	Manufacturing defects, workmanship	Paid extension to 10 or 20 years
Inverter	SolarEdge	12 years	Manufacturing defects, workmanship	Paid extension to 20 or 25 years
Power Optimisers	SolarEdge	25 years	Manufacturing defects, workmanship	Standard cover
Home Battery	SolarEdge	10 years	≥70% energy retention, unlimited cycles	Standard cover
Inverter / Battery (on request)	Sunsynk	10 years	Manufacturing defects, workmanship, battery capacity retention	Standard cover
Battery (domestic default)	Fogstar Energy	10 years	Cells, BMS, workmanship (defect-based)	Standard cover
Battery (commercial)	Pylontech Force-H	10 years	Capacity retention, manufacturing defects	Standard cover
Installation Work	Spectrum Energy Systems	5 years	Workmanship, property damage caused by our installation	Backed by QANW IBG
System Design	Spectrum Energy Systems	Professional Indemnity (£1M)	Design defects, performance issues from design flaws	QBE UK underwritten

Questions About Warranty Coverage?

Our team can talk through the cover that applies to your specific system configuration.

Contact Our Team Request a Quote

Detailed Manufacturer Warranties

Tier 1 Solar Panels: JA Solar, Aiko & LONGi

Up to 30 Year Performance Cover

Spectrum specifies tier-one monocrystalline panels with strong product and performance warranties. The three brands we routinely fit are JA Solar, Aiko and LONGi, each backed by a written limited warranty covering both manufacturing defects and long-term power output. Learn more about the difference between monocrystalline and polycrystalline solar panels.

JA Solar DeepBlue 4.012-year product warranty plus a 30-year linear performance warranty. Starts at 99% nameplate output in year one and degrades no more than ~0.4% per year, ending at approximately 87.4% of nameplate output in year 30. We fit the JAM54D41 series (430-455W) and JAM60D41/D42 series (500-540W) as standard.

Aiko N-type ABC15-year product warranty plus a 30-year linear performance warranty. Guarantees ~90.6% of nameplate output at year 25 and ~88.85% at year 30, the strongest performance curve of the three. All-Back-Contact cell architecture gives Aiko a slight efficiency edge.

LONGi Hi-MO 6 / Hi-MO X615-year product warranty plus a 30-year linear performance warranty, with end-of-warranty output of approximately 87.4% at year 30.

Transferable CoverAll three brands transfer warranty cover to subsequent property owners (subject to written notice to the manufacturer), preserving resale value.

What's covered: manufacturing defects, materials faults, processing issues and power output degradation beyond the published linear curve.

What's excluded: physical damage, improper installation, unauthorised modifications, and extreme weather events beyond product specifications.

Manufacturer warranty documents:

JA Solar Warranty (PDF) Aiko Warranty (PDF) LONGi Warranty (PDF)

Solis Hybrid Inverters

5 Year Standard | Extensions to 10 or 20 Years

Solis (Ginlong Technologies) is our standard hybrid inverter across both domestic and commercial installations. We typically fit the S5 / S6 single-phase hybrid range for homes and the S6-EH3P three-phase range for commercial. Their 5-year standard cover is paired with paid extensions taking total cover to 10 or 20 years.

5-Year Standard WarrantyCovers manufacturing defects and workmanship across grid-tied and hybrid energy-storage inverters. Cover commences from commissioning or six months after dispatch, whichever is earlier.

+5-Year Extension (10 yrs total)Paid option, typically around £67 + VAT for the 2.5-8.0 kW range. Must be purchased within 12 months of installation with serial number and proof of purchase.

+15-Year Extension (20 yrs total)Maximum paid extension, available for both the Mini (0.7-3.6 kW) and Dual MPPT (2.5-8.0 kW) ranges through authorised UK distributors.

2-Year Off-Grid & AccessoriesStandard cover for off-grid inverters and accessory components.

Claim process: contact Spectrum first. We coordinate with Solis UK's service team, submitting model number, serial number, fault details and installation certificate. Solis determines repair or replacement within standard warranty terms.

Full warranty document:

Solis Warranty UK, July 2025 (PDF)

SolarEdge Inverters, Optimisers & Batteries

10-25 Year Cover

SolarEdge introduced module-level power optimisation, which delivers stronger output on partially-shaded or multi-orientation roofs. We fit SolarEdge where panel-level optimisation is the right answer for the roof. Compare micro inverters vs string inverters to understand the optimisation approach.

25-Year Power Optimiser WarrantyModule-level electronics covered for the same lifespan as the panels.

12-Year Inverter WarrantyStandard cover for Home Hub single-phase residential inverters and three-phase commercial inverters (including Synergy Technology models) in the UK and EU.

10-Year Home Battery WarrantyCover for both Home Battery 48V and 400V, with at least 70% energy retention at end of term and unlimited cycles.

Extended Warranty OptionsInverter cover is extendable to 20 or 25 years total via SolarEdge's EU extension programme (paid). Pricing is published in SolarEdge's official extension pricelist.

Full warranty documents:

SolarEdge Limited Product Warranty, Dec 2025 (PDF) SolarEdge Home Battery 48V Warranty (PDF) SolarEdge Home Battery 400V Warranty (PDF) SolarEdge EU Warranty Extension Pricelist (PDF)

Fogstar Energy Batteries

10 Year Standard Cover

Fogstar Energy is our default battery brand for domestic installs. They're a solid and reliable UK-based supplier of LiFePO4 storage products with a sensible price tag. We routinely fit the 10 kWh, 16.1 kWh, 32 kWh and 48.3 kWh modular stacks. Cover is a flat 10 years from date of purchase across the cells, BMS and workmanship. Understanding the benefits of solar panel battery storage helps appreciate why we standardise on this brand.

10-Year Battery WarrantyCovers manufacturing defects and workmanship across the full Fogstar Energy LiFePO4 range.

Cycle Life SpecificationRated cycle life of 8,000 cycles. Fogstar's warranty is defect-based. They publish cycle life and 15-year shelf life rather than a fixed end-of-warranty capacity percentage.

Modular System CoverEach battery module within a stack carries individual cover, allowing partial replacement if a single module develops a fault.

Warranty RegistrationRegister the battery at fogstar-energy.co.uk/pages/register-warranty after installation to activate cover.

Warranty claims: contact Spectrum for any Fogstar concerns. We coordinate directly with Fogstar Energy UK for warranty assessment and resolution. Fogstar publishes warranty terms on their site rather than as a single downloadable PDF.

Full warranty terms:

Fogstar Energy Warranty Terms

Pylontech Force-Series Batteries (Commercial)

10 Year Standard Cover

For larger commercial installations we specify Pylontech Force-series high-voltage batteries, typically the Force H3 paired with a Solis three-phase hybrid inverter. Pylontech is one of the most widely deployed commercial storage brands globally.

10-Year Standard WarrantyCovers manufacturing defects and capacity retention across the Force H series (H1, H1-V2, H3).

Capacity RetentionGuarantees a minimum percentage of nameplate capacity at end of warranty, subject to specified daily cycling parameters set out in Pylontech's official warranty document.

Annual Health ReportingLike most commercial battery systems, Pylontech warranties are conditional on annual monitoring data being available to the manufacturer.

Warranty claims: contact Spectrum for any Pylontech concerns. We hold installation and commissioning records and coordinate directly with Pylontech's UK distribution channel for warranty assessment.

Full warranty document:

Pylontech Force-H Series Warranty V1.2 (PDF)

Sunsynk Inverters & Batteries (Customer Request)

10 Year Standard Cover

Sunsynk hybrid inverters and Sunsynk-branded batteries are available on customer request. We fit them where customers have a specific preference for the Sunsynk ecosystem.

10-Year Inverter WarrantyStandard cover from Sunsynk's UK distributor for hybrid and grid-tie inverters in the residential range.

10-Year Battery WarrantySunsynk-branded batteries are supplied with a 10-year warranty including capacity retention terms documented in the official Sunsynk battery warranty document.

Warranty claims: contact Spectrum for any Sunsynk concerns. We coordinate with Sunsynk's UK technical support team for warranty assessment.

Full warranty documents:

Sunsynk Inverter Warranty (PDF) Sunsynk Battery Warranty (PDF)

How Spectrum Manages Warranty Claims

One of the practical benefits of working with us is that we handle every warranty claim on your behalf. You don't deal with the manufacturer, you talk to us.

Our Warranty Claim Process

Step 1: Contact Spectrum. Call us on 0115 773 7575 or email sales@spectrumenergysystems.co.uk. We assess whether the issue is installation (our workmanship warranty) or equipment (manufacturer warranty).

Step 2: Diagnosis. Our engineers determine the root cause through remote monitoring or a site visit. Many issues resolve through a configuration change or simple adjustment, with no warranty claim needed.

Step 3: Warranty assessment. If there's a genuine product defect, we identify which warranty applies and gather the required documentation (serial numbers, install certificate, fault evidence, photos).

Step 4: Manufacturer coordination. We liaise directly with the manufacturer, submitting technical details and supporting paperwork. You don't have to navigate any of it.

Step 5: Resolution & reinstallation. Once the manufacturer approves a repair or replacement, we coordinate logistics, schedule reinstallation of replacement components and verify system operation post-repair.

Step 6: Ongoing monitoring. After the warranty work is complete we continue monitoring system performance to make sure the issue is fully resolved.

Keeping Your Warranty Valid

To maintain valid cover across all components:

Register the system with the manufacturer where required. Fogstar's 10-year battery cover, in particular, is activated by post-install registration. We complete this for you at commissioning.
Keep your documentation: installation certificate, commissioning report, MCS certificate, IBG certificate, manufacturer registration confirmations.
Consider regular maintenance. Our professional maintenance services catch potential issues early and preserve warranty validity.
Operate within manufacturer guidelines. Unauthorised modifications or use outside specified parameters will void cover.

Multi-Layered Protection on Every Installation

Workmanship warranty, IBG, professional indemnity, and tier-one manufacturer cover. All coordinated by us for the lifetime of your system.

Request a Quote Learn About Our Installation

Frequently Asked Questions About Solar Warranties

What does Spectrum's workmanship warranty cover?

Our workmanship warranty runs for 5 years from commissioning and covers the physical install work: roof penetrations, mounting, weatherproofing, electrical connections, consumer-unit modifications and commissioning. If our work causes a problem (a non-watertight tile, a faulty connection we made), we fix it at no cost. Equipment defects are covered separately by the relevant manufacturer warranty, and system design is covered by our £1M professional indemnity insurance.

What is an Insurance-Backed Guarantee (IBG) and why do you have one?

An IBG is a separate insurance policy that sits behind the workmanship warranty. If for any reason Spectrum can't honour the workmanship warranty during its 5-year term (including if we cease trading), the IBG provider (QANW) honours it instead. It's mandatory under the MCS scheme, issued automatically within 30 days of commissioning, and costs you nothing extra.

How long are solar panel warranties?

Tier 1 panels from JA Solar, Aiko and LONGi carry 12-15 year product warranties and 30-year linear performance warranties guaranteeing roughly 87-91% of original output at year 30 (Aiko ~88.85%; JA Solar and LONGi ~87.4%). These warranties are standard on every Spectrum installation and are transferable to subsequent property owners.

What inverter warranties are available?

Solis (our default) is covered for 5 years as standard, with paid extensions to 10 or 20 years total cover. SolarEdge inverters carry 12 years standard, with 25 years on the power optimisers and paid extensions available. Sunsynk inverters supplied on customer request are covered for 10 years standard. All inverter warranties cover manufacturing defects and workmanship.

Are battery storage systems covered by warranty?

Yes. Fogstar batteries (our default for domestic) are covered for 10 years from purchase across the 10, 16.1, 32 and 48.3 kWh products. SolarEdge Home Batteries are covered for 10 years with at least 70% energy retention. Pylontech Force-series batteries used on larger commercial installs carry a 10-year warranty with capacity retention guarantees. Sunsynk batteries are covered for 10 years. All battery warranties cover manufacturing defects.

What insurance does Spectrum carry?

£10 million Employer's Liability, £5 million Public Liability and £1 million Professional Indemnity, all underwritten by QBE UK Ltd (A-rated). Professional Indemnity covers any design-related issues that prove defective or fail to perform as specified. The PL and EL cover sit in front of the workmanship warranty for incidents that occur during or as a result of our work.

How do I make a warranty claim?

Contact Spectrum first on 0115 773 7575 or sales@spectrumenergysystems.co.uk. We assess whether the issue relates to installation (our 5-year workmanship warranty) or equipment (manufacturer warranty). For manufacturer claims we handle everything on your behalf, including paperwork, replacements and scheduling the reinstallation.

Can warranties be transferred to new property owners?

Most manufacturer warranties are transferable to subsequent property owners, provided the system remains in its original installation location and operates within specified parameters. Procedures vary by manufacturer: some require written notification, others transfer automatically. We provide the documentation needed to support a transfer when you sell the property.

What voids solar equipment warranties?

Typical exclusions: unauthorised modifications or repairs, installation by a non-accredited installer, operating outside specified parameters, physical damage from accidents or extreme weather events beyond product specifications, and missed registration windows. MCS-accredited installation by Spectrum and proper post-install registration preserve warranty validity throughout system life.

Do I need to register my system for warranty cover?

It depends on the manufacturer. Fogstar batteries require post-install registration to activate the 10-year cover. Solis and SolarEdge don't require registration for standard cover but recommend it for streamlined claims. Sunsynk and Pylontech batteries are registered through the distributor channel. We complete the relevant registrations on your behalf at commissioning.

Why Multi-Layered Protection Matters

A solar system is a significant investment. Typically £8,000 to £20,000 for domestic, £30,000 to over £100,000 for commercial. Three independent cover layers safeguard that investment across the lifetime of the system.

The Cover Stack

Workmanship Warranty (5 Years), backed by QANW IBG: protects against issues arising from how the system was installed.

£1M Professional Indemnity (QBE UK): protects against issues arising from how the system was designed.

£10M EL + £5M PL Insurance (QBE UK): covers liability for injury or damage during or arising from our work.

Equipment Warranties (5-30 Years): manufacturer cover for the panels, inverter and battery. Tier 1 panels carry 30-year linear performance warranties; SolarEdge optimisers carry 25 years; SolarEdge inverters 12 years; Solis 5 years standard (extendable to 20).

Lifetime Support from Spectrum: beyond formal warranties we provide ongoing technical support and claim coordination for as long as the system is in service.

Additional Solar System Resources

For more on solar system components, performance and maintenance:

How Long Do Solar Panels Last in the UK?: lifespan, degradation rates and longevity factors
Complete Solar Panel Maintenance Guide: best practices for preserving performance and warranty cover
Common Solar Panel Problems: troubleshooting guide identifying issues and solutions
How Efficient Are Solar Panels?: efficiency ratings and real-world performance
Ultimate Guide to Installing Solar PV: design through commissioning
Complete Business Solar Guide: commercial solar including warranties, financing and ROI
Choosing the Right Solar Panel: component selection for optimal system performance

Multi-Layered Protection. One Number to Call.

From the 5-year workmanship warranty through to the 30-year manufacturer performance guarantees, we coordinate everything for you.

Request a Quote View Our Case Studies

Contact Spectrum Energy Systems

Phone: 0115 773 7575
Mobile: 07700 145 946
Email: sales@spectrumenergysystems.co.uk
Address: Unit 19 Pottery Court, Pottery Way, Bulwell, Nottingham, NG6 8YN

Our team will talk through the cover that applies to your specific system: workmanship warranty, IBG, professional indemnity, public liability, and the manufacturer warranties on every component we install.