Diesel generators from 50 kVA: Mobile generators for emergency power solutions2024-06-03T09:26:55+02:00

Diesel generators from 50 kVA: Mobile generators for emergency power solutions

Discover our powerful battery generators for your power supply.

Diesel generators from 50 kVA: Mobile generators for emergency power solutions

Discover our powerful battery generators for your power supply.

Save up to 60 % on operating costs

Find the right power generator up to 50, 100 or 150 kVA.

Do you need a reliable power source? You may be thinking about buying a diesel generator or renting a mobile generator for flexible use. Whether you want to rent an emergency generator or buy a diesel generator, we understand your requirements. Our products offer high-performance solutions for every need. Discover our selection of mobile power generators, which are much more efficient, stable and cost-effective as battery generators than comparable diesel generators from 30 kVA.

Diesel generator cost calculator

Compare the costs of your diesel generator

Use our calculator to work out the total cost of running your current diesel generators compared to our emost Butler products. Simply enter the specific data of your diesel generators and the expected operating hours per year to determine the costs over a specific period. Then compare the results with the costs of operating our mobile battery generators and discover the benefits for your company. Try it out now!

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Diesel generators in comparison

The following models from various manufacturers can serve as a basis for an overall cost calculation to evaluate the cost-effectiveness and efficiency of power generators. Of course, you can also use your own data in the diesel generator cost calculator above to see how much cheaper an emost Butler is in comparison.

Generator KVA (electric) Price Diesel consumption in liters at full load at 75% load (best operating point) at 50% load at 25% load Emission standard
JCB 20 14.500,00 € 4,4 3,2 2,2 Euro 5
Aggreko 30 8,1 with DPA
GEKO diesel generator 30 kVA 30 7,2 5,5 No exhaust gas aftertreatment
Boels 30 7 5,25 No exhaust gas aftertreatment
RID 30 B-SERIES 30 7,4 5,6 Stage 5
Atlas Copco 30 6,53 4,95 3,96
Voltherr VDL-40-C 40 11,03 5,9 No exhaust gas aftertreatment
40 kVA power generator T44C3 36 11,20 8,4 No exhaust gas aftertreatment
RID 40 B-Series 40 11,3 8,4 Stage 5
JCB 40 9,5 7,4 5,4 Stage 5
United Rental 40 10,32 7,44 5,43 Stage 5
Aggreko 60 22.500,00 € 14,90
Atlas Copco 43 10,10
Atlas Copco QAS+ 45 10,34 7,75 5,39 1,68
CAT 50 11,7 No DPA
Cummins 50 12 9,4 6,4 3,8 No DPA
Manel service 50 22.999,00 € 11,20 8,4 Stage 5
Kohler 50 27.500,00 € 10,80 8,1 Stage 5
CAT 65 15,3 11,3 7,8
Aggreko 60 14,90
JCB 100 23,40 17,60 11,40 Stage 5

Ready for an electrified future with a hybrid portfolio?

Replace your diesel generators with mobile battery generators and benefit from lower operating costs, increased flexibility and optimum equipment utilization. Our Butler products are compatible with your existing generators, so you can switch seamlessly.

Butler S 50/25

Der emost Butler S ist ein kompakter Energiespeicher mit einer Nennleistung von 50 kVA und einer Batteriekapazität von 25 kWh. Ideal für vielseitige Anwendungen wie Baustellen, Events und temporäre Einsätze. Der Butler S bietet emissionsfreie, leise und zuverlässige Energie ohne Kraftstoffverbrauch.

Die wichtigsten Kennzahlen

  • Ladezeit (Vollladung): < 4.5h

  • Gewicht: 660 kg (exkl. Anhänger)

  • (L x B x H): 1480 x 820 x 1105 mm

  • Optionaler Anschluss: CEE 63A 400V

Optionale Features

  • emost Anhänger

Butler M 150/150

Wenn Ihre Ansprüche größer sind, empfehlen wir Ihnen den emost Butler M. Mit einer Nennleistung von 150 kVA und einer Batteriekapazität von 150 kWh ist er die optimale Wahl für größere Anlagen und industrielle Anwendungen. Der Butler M überzeugt durch emissionsfreie und geräuschlose Arbeitsweise.

Die wichtigsten Kennzahlen

  • Ladezeit (Vollladung): < 4.5h

  • Gewicht: < 3.000 Kg (exkl. Anhänger)

  • (L x B x H): 2500 x 1120 x 1650 mm

  • Optionaler Anschluss: CEE 125A 400V

Optionale Features

  • emost Anhänger


Free of permits for rapid mobilization with fast transport and easy operation


Work without noise pollution, which improves communication and safety.


Save immense costs and time compared to diesel generators and temporary grids.


You always get the right amount of power without wasting valuable energy.


Eliminates exhaust fumes, which promotes health and reduces ventilation requirements.


Unlike diesel power generators, the emost Butler produces no harmful emissions.


Get started on your construction site immediately without having to wait for permits and energy.


The emost Butler provides you with continuous power supply, without fuel consumption or noise pollution.

More discount is always possible!

Payback: By using the emost Butler, 10-20 tons of CO2 are saved annually compared to diesel generators. This corresponds to a CO2 saving of over 100 tons over 10 years!
For this reason, you will receive an additional credit of around 6,500.00 euros from our partner myclimate when you buy a Butler !

Why is the utilized energy of the diesel generator only 15%?

Imagine operating a construction site with a crane that operates for a short period every 10 minutes. However, the diesel generator that supplies the energy must run continuously in order to be ready for each of these short phases. Even though the crane only sporadically requires energy, the diesel generator continuously generates electricity. This discrepancy between the energy actually used and the energy permanently generated means that only around 15% of the energy generated is actually used. This loss of efficiency is amplified because the connected end devices never fully absorb all the energy generated by the diesel generator, but often only require a fraction. This illustrates why the emost Butler, which supplies energy efficiently and on demand, is a more cost-effective solution.

Success stories of our customers

Field report by Markus K.:

“The emost Butler S has revolutionized our construction projects. As a contractor, I was skeptical at first, but after we used it on several construction sites, I am completely convinced. No noise, no exhaust fumes and always a reliable power supply – these are just some of the benefits. Our workers appreciate the quiet working environment, and I appreciate the cost savings from not having to use diesel fuel. The emost Butler S has not only minimized our environmental impact, but also increased our efficiency. It is a gamechanger for our industry and has established itself as an indispensable tool on our jobsites. Thank you, emost, for this innovative solution!”

Field report: The emost Butler S and the Monotrac from novaziun

As a farmer, I was looking for a reliable energy solution for my Monotrac from novaziun. The emost Butler S has proven to be the perfect answer to my needs. With its impressive power, it provides a fast and reliable power supply for my electric tractor, even in remote rural areas. Its mobility and environmental friendliness make it an ideal solution for agriculture. Thanks to the Butler, I can run my agricultural machinery smoothly and sustainably. This innovative technology has greatly improved my work as a farmer. Many thanks to emost and novaziun for this innovative solution!

Field report: The emost Butler S in the residential area

We are successfully using the emost Butler S in a residential area where strict noise regulations and lack of 63A/400V connections are a challenge. This mobile battery generator supplies our mobile crane reliably and quietly. With 25 kWh capacity, it provides a full workday of energy in stand-alone mode. The Butler S not only meets residential codes, but provides a sustainable and reliable power supply. This solution has exceeded our expectations and contributes significantly to the sustainability of our projects. We are thrilled with the performance of the Butler S and look forward to more successful deployments!

Field report by Petra S.:

“Mobility and flexibility are crucial for us on construction sites. The emost Butler S has given us exactly that. We can easily transport it from site to site, which makes the work of our construction project teams much easier. Whether we are working in remote locations or need temporary power, the emost Butler S is always at our disposal. The fact that we no longer have to worry about fuel procurement and exhaust fumes is a big bonus. We are very happy with the performance and flexibility of the emost Butler S.”

Field report: The emost Butler S in use for cherry pickers and more

The emost Butler S, with its impressive 25 kWh capacity and 50 kVA output (75 kVA at peak), has proven to be a reliable power source for a 26-ton cherry picker. But not only that – it also supplied a high-pressure cleaner and an osmosis system with pump for cleaning facades. The compact Butler S successfully replaced the diesel generator and eliminated the need for additional power from the building. This quiet helper in the background enables our customers to carry out their work efficiently and in an environmentally friendly manner. We are proud of this sustainable solution and look forward to further successful projects!

Field report: The emost Butler S in use at JoLa Rent – A complete success!

As an employee at JoLa Rent, I can report with great enthusiasm how successfully the emost Butler S has been integrated into our film and TV equipment inventory. It not only supplied a wide range of vehicles for make-up and wardrobe, but also our generators, mobile WC units, Sprinter vehicles and the diverse needs of our film crew. It doesn’t matter whether it was actor accommodations, team bases of various sizes, or special vehicles such as drinking water and sewage trucks, showers, and mobile road heaters – the Butler S proved itself in every situation. We appreciate the innovative solution that the Butler S represents for the film and TV industry and look forward to a long-term partnership with emost.

An unforgettable event:

When I came to this particular event at the nature preserve, I didn’t know about emost and their mobile batteries. It sounded almost too good to be true: a celebration with 200 guests in the middle of nature, away from any conventional power sources. How should this work?

But when the event started and I saw the stage lights, the refrigerators, and even the cozy radiant heaters powered by these quiet, eco-friendly batteries from emost, I was simply amazed. The fact that we could celebrate in the middle of nature, without noise, without stench and especially without the usual diesel generators, was impressive.

The autumn sunshine did its part to lift the spirits, but the real wonder was the clean energy delivered by these emost BUTLER S units. Not only was it a great celebration, but it was an eye-opener for me – proof that green energy for events is possible. From now on, I will certainly think of emost when I think of sustainable events.

Ready for a reliable and cost-efficient power supply?

We understand that switching to new technologies is an important decision. That’s why we at emost are happy to answer your questions and help you find the best solution for your individual needs.

Simply fill out the form below and let us know how we can help you. Whether you need more information, would like to request a free trial of the Butler for your project or just want some general advice – we are here for you.

Arrange a free callback.

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