Butler S — 50 kVA Mobile Battery Energy Storage System
The Butler S is a compact, trailer-mounted battery generator delivering 50 kVA of clean power. It replaces diesel generators on construction sites, events, and wherever noise or emissions are unacceptable.
Technical Specifications
| Rated Output | 50 kVA |
| Battery Capacity | 25 kWh |
| Max Output Current | 63A (CEE 63A 400V) |
| Grid Input | CEE 16A 400V or single-phase 220V |
| Weight (excl. trailer) | 660 kg |
| Weight (incl. trailer) | 930 kg |
| Noise Level | Silent operation (<45 dB at 1m) |
| Operating Temperature | -20°C to 40°C |
| ADR | No certification required (<1000 points) |
| IoT Monitoring | Full platform included |
| Emissions | Zero |
Where the Butler S Works
Construction Sites
Silent, emission-free power for construction projects of all sizes.
Events & Festivals
Clean power for outdoor events, film sets, and nature venues.
Crane Power
Autonomous operation of mobile cranes like the Liebherr MK 110.
Night Construction
Work through the night without noise complaints or permits.
Need More Power?
Multiple Butler S units can be linked via the Link Box for additive capacity and power output — up to 125A via Powerlock.
Learn about the Link BoxReady to Replace Your Diesel Generator?
Get a customized quote or arrange a free trial on your next project.