What does Sundays-onsite do?

On-site preventive maintenance specialist for photovoltaic inverters across France. Provides I-V curve diagnostics, multi-brand inverter component replacement, and monitoring system optimization with 3-year warranty.

Where is Sundays-onsite located?

Sundays-onsite is headquartered in Mulhouse, France.

What energy sectors does Sundays-onsite operate in?

Sundays-onsite operates in Solar.

How many employees does Sundays-onsite have?

Sundays-onsite has approximately 50-200 employees.

When was Sundays-onsite founded?

Sundays-onsite was founded in 2026.

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Sundays-onsite

Mulhouse, France

SolarPrivate

Founded 202650-200 employees

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About

Founded in 2026, Sundays-onsite is a private headquartered in Mulhouse, France with approximately 50-200 employees specializing in Solar.

Sundays-onsite is the field subsidiary of Sundays Data System, specializing in preventive maintenance of photovoltaic inverters and systems. The company deploys technicians directly to installations throughout France to perform preventive component replacement, I-V curve tracing using certified Seaward equipment, monitoring system configuration and troubleshooting, and performance audits. Services cover multi-brand inverters (SMA, Fronius, Sungrow, Huawei, ABB, KACO, KOSTAL) with a 90% repair success rate and 3-year warranty post-intervention. The company has treated over 5,000 inverters and serves 900 clients across 12 countries, emphasizing the 'Renewable 2.0' philosophy: repair rather than replace, prevent rather than react, transmit expertise rather than improvise.

preventive maintenanceI-V curve diagnosticsphotovoltaicon-site serviceinverter repairmonitoring systemsmulti-brand support

Headquarters

Mulhouse, France

Founded

2026

Employees

50-200

Company Type

Private