Organize growth in a structured and digital way

work4all is the all-in-one software solution for solar and photovoltaic companies

In the cloud or on your own server
Over 35 years of ERP and project experience in the solar industry
Clear presentation of the project business
Zwei Solarteure bei der Arbeit auf einem Dach
Laptop und Handy Screen mit einer Beispiel-Projektakte in work4all

Excellent on all platforms

DATEV Marktplatz Kundenbewertung 5 Sterne
work4all Google 5 Sterne Bewertung
work4all App Store 4,9 Sterne Bewertung
work4all ERP-System des Jahres Award 2025
work4all ist zertifiziert von Datenzschutzexperte
Logo Trovarit-Studie ERP-Praxis
GoBD zertifiziert Logo

Over 1000 companies trust work4all

From individual users to teams of 200. From office staff to field technicians and management.

"The implementation of work4all has greatly helped us organize our growth in a clear and digital way."
Porträt_Sarah Liske_Rehl Energy
Sarah Liske
Executive Management, Rehl Energy GmbH
Your all-in-one solution

Important functions for companies in the photovoltaic and solar industries

Bills of materials for calculation

Your customers want a quote for a turnkey installation but should not see all the components of the planned system, especially not the purchase prices and surcharges? This can be managed through bill of materials; you see the components and can calculate with them, while your customers do not.

Grafik einer Stückliste, die in ein Angebot gewandelt wird in work4all
Packliste in der Lagerverwaltung

Warehouse management via software or warehouse scanner

The product inventories can be filtered by storage locations or displayed as a complete inventory. The inventory management from work4all also enables the digital management of warehouse items in storage areas using mobile Warehouse scanner via the app.

Warehouse management can be used for classic high-bay warehouses, smaller storage areas, project warehouses or mobile storage locations such as delivery vans.

Have service reports digitally signed by the customer

With the work4all app, you can have service reports or delivery notes signed on-site at the customer’s location using your tablet. The service reports can then be billed in work4all by customer or project – a fully digital process.

Unterschrift eines Kunden direkt auf dem Tablet mit der work4all App. So können Lieferscheine direkt beim Kunden vor Ort unterschrieben werden.
Handy Bildschirm mit der Darstellung der Arbeitszeiterfassung eines Mitarbeiters in work4all

Mobile time tracking for field staff

Project hours can also be recorded on the go with the work4all app. The tedious task of entering hours later in the office is now a thing of the past. In the desktop version of work4all, the hours can then be converted into service reports or invoices. Together with external services (incoming invoices), all project costs are visible in real time.

Ticket management for high service quality

The quality of your organization is reflected in the supposedly minor incidents such as “faulty socket” or “cable bursts”. work4all's ticket management helps you to record these cases cleanly, keep track of them, plan appointments and bill them cleanly.

Beispiel Ticketverwaltung in work4all. Zum einen ein Ticket zur Prüfung eines Leistungsverlusts, zum anderen PV-Anlage 28 kWp + Batteriespeicher
Artikelverwaltung und Artikelliste mit verschiedenen Gruppierungen in work4all

Stay on top with automated order management

To keep track of supplier orders, you can place orders directly from projects using automated order management. This allows items that are not in stock and are needed for a specific project to be ordered at the same time.

CRM, ERP, and Project Management for Solar and Photovoltaic Companies

work4all is the leading ERP and project management software for solar and photovoltaic companies. This all-in-one solution combines CRM, project management, time tracking, resource planning, document management, and billing in a single, central system. Solar installers can maintain a complete overview at all times – from the first project inquiry to the billing of hours. All commercial and organizational processes run digitally and in a structured way – in the office and on the go via tablet or smartphone. Thanks to our many years of industry experience, we know exactly what matters in practice. work4all is the industry standard for digital, efficient, and successful solar and photovoltaic companies.

Bring your growing business processes into a digital home.

work4all brings together what belongs together: projects, customers, invoices, documents, products, and employees. Everything clearly integrated in one software.

One control centre instead of lots of special tools and makeshift solutions
Experienced process and digitalisation specialists by your side
Easy to use for all department - even when you're on the move
"Transparent customer and project management, fair pricing, and DATEV integration make work4all a true home for our business."
Foto von Andreas Steffens - Geschäftsführer unseres Kunden Steffens Systems GmbH
Andreas Steffens
Managing Director, Steffens Systems GmbH