GYPSUM, Colo. - ColoradoDesk -- GYPSUM, Colo. -- Winter is generator season on American jobsites. Diesel, refueling runs, noise and a running meter.

JOLT builds a different answer in Gypsum, Colo. The Grid-Free 20-foot office container carries rooftop solar, a 10 kWh battery, Starlink internet and a security camera. It rents for $1,495 a month. No generator. No fuel deliveries. No utility hookup.

The savings are on JOLT's site, not in a brochure. Its generator calculator shows a typical crew keeps $813 a month by switching off a generator-powered trailer.

For crews pouring concrete or thawing ground this winter, JOLT also rents ground heaters at $1,450 a month.

"Contractors pay for a generator every month and never see the bill as one line," said a JOLT spokesperson. "Grid-Free puts the power on the roof. The office is warm, online and on camera from day one."

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Who it fits: general contractors, utility and pipeline crews, solar and wind builders, road crews and disaster-recovery teams working where grid power is far away or slow to connect. The office arrives ready to work, with no trenching, no utility application and no fuel schedule to manage.

JOLT ships across the lower 48 states. Quotes return within one business day.

See it:
- Grid-Free solar office container (https://joltrents.com/rent/20ft-office-container/grid-free/)
- Ground heater rentals (https://joltrents.com/rent/ground-heaters/)
- All JOLT jobsite offices (https://joltrents.com/offices/)

About JOLT
JOLT rents and sells jobsite office containers and equipment. Its units are built in Gypsum, Colo., and delivered across the lower 48 states.

Pricing from joltrents.com as of Nov. 9, 2026. Savings figure from JOLT's generator calculator; actual savings depend on fuel price and run hours.