Tip-top condition
State-of-the-art service

Much like other forms of insurance, our systems are not required on a daily basis.

But when they are, they need to be ready. The fact that emergency power systems are on standby most of the time makes testing and regular maintenance all the more important. A Zwart multi-year maintenance plan will ensure your system stays in tip-top condition, providing 25 years of operational security.

Our service organisation consists of 35 specialists who are there to provide our customers with scheduled maintenance support and are on standby 24/7 to swing into action whenever required. Our extensive coverage usually means we can be onsite within two hours in the event of an emergency. Zwart currently maintains over 1200 systems for more than 300 customers in eight countries.

Maintenance plan

A Zwart maintenance plan is designed to ensure your emergency power system performs as it is designed whenever it is required throughout its lifetime. Our plan includes a comprehensive series of checks carried out by our trained service personnel. In addition to this we carry out regular inspections and replacement of consumables and other components in line with OEM guidelines and our condition based maintenance approach.

Revisions and updates

Typically at around 10 years into the life of the system we carry out a major revision of the system to ensure it is fit to perform reliably for at least another 10 years. This usually involves a strip-down of the major parts, preventative replacement of critical components and a comprehensive inspection of all major elements of the engine. After 15 years the underground fuel systems must be re-inspected. This is a legal requirement in certain countries and of course we take care of this for our customers.


Our maintenance plans and programs for revisions and upgrades form the basis of our service delivery. But as the market leader in emergency power we offer more than just that. We provide condition-based maintenance and predictive-based maintenance. Remote monitoring of the system can be installed to provide us with the ability to carry out tests of fault finding via a secured internet connection. Using the data we can make better decisions as to when the next maintenance interval needs to be scheduled. In doing so ca can extend the lifespan of the system and make sure it stays in optimum condition in a cost-effective way.


“There’s no need to chase anything up. They give you complete peace of mind.”

“I have around 80 maintenance contracts and I don’t want to have to chase each and every one of them up. Zwart gives you peace of mind. Periodic maintenance is scheduled, I know exactly when it’s being done and by who. Zwart is certified to perform SCIOS inspections. They make sure you comply with the latest legislation and regulations. That is important to us. If I have a question, they have an answer. They are simply crazy about the job. You know you’re in good hands.”

Hans van Katwijk, Alrijne Zorggroep



We offer all in one solutions

Drawing, engineering, building, realizing and installing an installation is a project with a clear head and tail. At least for us. We know exactly what is needed in which phase. How one phase can seamlessly connect with another. Our internal processes are also closely aligned. And in the meantime we keep the customer informed step by step where we stand. That is project management the Zwart way.

Design and Engineering

An emergency power system designed for you. Quality throughout the process.

Installation and commissioning

It's only done when it's done. Accurate throughout the process.

Service and maintenance

Tip-top condition. State-of-the-art service.

Want to know more about service and maintenance?

Service and maintenance are Loek Frederiks’ middle names. He will gladly explain to you what this means for you as a Zwart customer. Call him or send him an email, you’ll be in good hands with Loek.

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Loek Frederiks


+31(0)255 530 304

Revisies en upgrades

Stilstand is achteruitgang, dat geldt ook voor onze noodstroominstallaties. We zullen daarom regelmatig revisies en upgrades uitvoeren om de installatie in optimale conditie te houden.

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Keuringen en inspecties

Zwart en onze monteurs zijn SCIOS gecertificeerd en kunnen daarom deze keuringen voor u verrichten. Zwart wordt door de stichting SCIOS zelf jaarlijks geaudit.

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Een (nood)stroominstallatie in huis hebben is één, maar weten hoe het werkt is twee. Wij vinden het belangrijk dat de klant weet wat hij in huis heeft en ook weet hoe het werkt.

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When it matters most

Reliable backup from Zwart

With over 7,000 projects in more than 50 countries in the field of emergency power and off-grid solutions, Zwart has an outstanding track record, throughout Europe, Africa and the Middle East. There is a reason why the biggest data centres and financial institutions in Europe as well as major airports and mobile networks rely on Zwart; Our 100 in-house trained professionals are qualified to design, engineer, realise and maintain integrated and complete systems for emergency power supply. And we have been doing so for over 90 years.

We set the bar high for ourselves and demand the same from our partners and suppliers; we work exclusively with premium quality products and service providers, we assemble the systems at our own 6,000-square metre site in Ijmuiden and subject them to a rigorous testing and inspection program before releasing them. Our customers also receive the same high level of attention through training and knowledge sharing our training centre equipped with a state-of-the-art simulator.

More about Zwart

Loek Frederiks


+31(0)255 530 304

Service and maintenance are Loek Frederiks’ middle names. It’s what he has built his whole career on. He will gladly explain to you what this means for you as a Zwart customer. Call him or send him an email, you’ll be in good hands with Loek.

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