Quiet, Reliable Power: POWRBANK Hybrid BESS Cuts Genset Runtime by 90% on Remote Trailer Site

A remote project needed dependable, quiet, overnight power for a double-wide office trailer. They had a diesel generator running 24 hours a day, burning fuel and driving up operational costs – even when the power demand was low. By switching to a POWRBANK Hybrid Battery Energy Storage System (BESS), they cut generator runtime by nearly 90%, lowered fuel costs, reduced emissions, and gained a reliable power source that worked seamlessly around the clock. 

Challenge: Quiet, Reliable Power for a Remote Site 

The site managed a double-wide trailer that functioned as the project’s administrative center.

Daily operations required electricity for HVAC, lighting, restrooms, and a small kitchen, supporting staff who worked on computers, held meetings, and used standard office equipment.

At night, however, the essential load dropped sharply to roughly 500 watts to keep a refrigerator, safety lights, and minimal heating running.

Despite that small demand, a diesel generator still operated 24/7, idling through low-load hours. This created a costly and noisy mismatch: the generator burned diesel continuously and required regular service even when producing a fraction of its output capacity. Noise levels and fumes also made the site less comfortable for overnight staff. 

The goal was a temporary power solution that could:

• Operate quietly during the night
• Adjust automatically to different load levels
• Eliminate unnecessary fuel use
• Require minimal onsite supervision

The answer was a hybrid battery energy storage system that could intelligently manage energy day and night.

Solution: Rapid Deployment with POWRBANK Hybrid 

POWR2 recommended the POWRBANK Hybrid, a mobile battery energy storage system (BESS) engineered to pair with or replace diesel generators. Traditional setups require electricians to wire each circuit separately to a generator and a breakout box. That process increases installation time, cost, and complexity. The POWRBANK Hybrid simplified everything. It provides a single, direct termination point, eliminating multiple wiring steps and making setup faster and safer.

“Setting up the POWRBANK Hybrid unit was extremely easy. It’s as simple as connecting a straight generator.” 

Skylar Horn, Technician, United Rentals

Instead of hours of electrical work, the crew simply pulled cables, connected them once, and energized the trailer in under half an hour. This streamlined approach cut labor costs and avoided common setup delays.

How POWRBANK Hybrid Works — Day and Night 

The POWRBANK Hybrid combines advanced battery storage with a backup generator in one compact, trailered unit. The battery energy storage system delivers primary power, while the generator activates only as needed.  

• Daytime: When energy demand rises with office activity, the POWRBANK Hybrid can supplement the generator to handle high loads seamlessly.
• Nighttime: When demand falls to a few hundred watts, the battery bank seamlessly powers the trailer in complete silence, without the generator.
• Automatic Recharge: The generator starts only when the battery’s state of charge needs replenishing, eliminating the waste of running a large diesel engine for minimal demand.

This hybrid operation not only conserves fuel but also provides operational flexibility.
If the project requires more equipment or temporary offices, the POWRBANK Hybrid can scale without major rewiring. The built-in POWR2’s ADVANTAGE energy control system enables remote monitoring and control. Site managers can check energy levels, view real-time performance, and adjust settings without visiting the site.

Measurable Results After 2.5 Months 

The numbers reveal how quickly efficiency gains accumulate. By reducing generator runtime by nearly 90 percent, the setup cut fuel deliveries, minimized maintenance, and dramatically lowered the site’s carbon footprint. 

“With the hybrid system carrying the load during low-consumption periods, there’s less firefighting and more confidence that power isn’t something we have to babysit.”

Emma Seymour, Regional Product Development Manager – Sustainability, United Rentals 

The POWRBANK Hybrid BESS proved to be a reliable and self-managing solution that adapted automatically to changing load conditions.
 It allowed the site to maintain full operations without the noise and expense of constantly running a generator.

Beyond the Metrics 

The human impact was equally significant.

The project delivered benefits that went far beyond fuel savings and emission reductions.

• Quieter Work Environment: Switching to battery power at night transformed the acoustic profile of the site.
• Simplified Maintenance: Reduced generator runtime meant fewer oil changes and repairs, freeing technicians for higher-value tasks.
• Extended Equipment Life: Less wear and tear on the generator resulted into longer service intervals and delayed replacement costs.
• Remote Visibility: Through ADVANTAGE monitoring and control system, the team could track performance and address any issues without traveling to the site.

Operational Confidence: The combination of automatic switching and real-time data meant power was one less thing to worry about.

The change was as much about peace of mind as it was about efficiency. The site remained fully functional throughout the transition, and daily operations became simpler and quieter.

Conclusion 

The POWRBANK Hybrid Battery Energy Storage System (BESS) proved that even a single office trailer can achieve dramatic savings and sustainability improvements. By delivering silent overnight power, slashing fuel costs, and cutting nearly 34,000 pounds of CO₂ emissions in less than three months.

The results went beyond numbers — the system improved daily operations, extended equipment life, and gave the team confidence that their power supply was both sustainable and dependable. The project underscores how a hybrid battery energy storage system can provide a fast return on investment and a cleaner, more efficient way to keep operations running around the clock.