Solar warranties: what you really need to look at | Solar self-consumption in France

To embark on thesolar self-consumption in France is an excellent decision for reducing your electricity bill and producing cleaner energy. But beyond the price of the panels or their efficiency, one element is often underestimated: solar warranties.
However, it is they that truly protect your investment and determine the profitability of your solar energy savings in the long term. Here's what you really need to look at before signing.

Why guarantees are crucial in solar self-consumption in France

Installing solar panels means committing to 20 to 30 years oldIn solar self-consumption, the reliability of the equipment is essential to ensure a local production stable and durable.

Without solid guarantees:
• Breakdowns can become costly,
• Production is falling faster than expected.
• the expected savings disappear.

The guarantees are therefore a key profitability lever, just like the yield or the orientation of the roof.

The three solar warranties to analyze first

1. Product warranty: the foundation of your security

The product warranty covers the manufacturing defects.

On average:
• Solar panels: up to 30 years
• Inverters: 10 to 15 years old
• Micro-inverters: up to 20–25 years old

👉 When considering solar self-consumption, prioritize manufacturers offering a warranty clear, written and locally applicable.

2. Performance guarantee: the heart of solar energy savings

This is the most important guarantee.

It ensures that your panels will maintain a certain level of production:
• Approximately 80 to 85% after 30 years

To maximize your solar energy savings, check:
• the annual degradation rate (ideally ≤ 0,5 %),
• the calculation method in case of a production decrease.

A poor performance guarantee can significantly reduce your profitability local production.

3. The installation guarantee: often forgotten, but essential

This guarantee depends on the installer, not from the manufacturer.

It covers:
• installation errors,
• sealing defects,
• wiring problems.

In France, a good installation is essential to secure your solar self-consumption and avoid production losses from the very first years.

Solar self-consumption in France: beware of common pitfalls

Some guarantees are more marketing than reality.

⚠️ Beware:
• “25-year guarantees” without details,
• guarantees valid only abroad,
• contracts without provision of labor.

A vague guarantee can negate all the benefits of your local production.

One crucial point: the installer's certification (often overlooked)

The reliability of a solar installation depends not only on the equipment, but especially the professional who installs it.

Before starting any project, it is essential to verify that the installer is:
✅ RGE (Recognized Environmental Guarantor)
✅ certifié QualiPV
✅ avec des up-to-date professional insurance (civil liability, ten-year warranty)

Without these guarantees, even the best equipment can become a bad investment.

👉 That's exactly why, at Eurosun DistributionWe constantly monitor our installation partners:

• RGE and QualiPV certifications,

• active and compliant insurance policies,

• operational reliability,

• seriousness of professional practices.

We only select reliable, qualified, and insured installers, in order to to guarantee the reliability of the installation as much as that of the equipment.
👉 With Eurosun Distribution, you're not just buying panels: you are buying comprehensive security.

How to choose a truly reliable warranty?

Before signing, ask yourself these questions:
• Who manages after-sales service in France?
• What is the timeframe for intervention?
• Are the parts available locally?
• Is the guarantee contractual and in writing?
• Is the installer RGE, QualiPV certified, and insured?

A good project forsolar self-consumption in France relies as much on the strength of the guarantees that on the that on the.

Conclusion

Solar warranties are not a detail: they are the key to successful solar self-consumption in France.
By choosing solid product, performance and installation warranties, and by relying on certified installers, you secure your solar energy savings and ensure a reliable local production over several decades.

👉 Before looking at the price, look at the warranties.
👉 Before choosing the equipment, check the installer.
👉 And above all, surround yourself with reliable partners.

This is often where the difference lies between a good deal… and an unpleasant surprise.