Jobsite Power: Running Tools Where There’s No Outlet
Generators for jobsite power have a different set of requirements than generators for home backup or camping. They need to handle high-draw power tools simultaneously, survive rough handling and transport, provide clean power for sensitive electronics and battery chargers, and run reliably through a full 8-hour work day. Here’s how to size and choose the right jobsite generator.
Calculating Jobsite Power Needs
List every tool you’ll run simultaneously at peak demand. Typical jobsite loads: table saw (15A/1,800W), miter saw (15A/1,800W), compressor (15A/1,800W running, 4,500W starting), battery chargers — 4 simultaneous (400W total), jobsite radio (50W), site lighting (200W). Peak simultaneous draw: approximately 6,000–8,000W with compressor starting surge. A 10,000W generator provides comfortable headroom and allows additional tools as the crew expands.
Power Quality for Battery Chargers
Modern lithium-ion battery chargers (DeWALT, Milwaukee, Makita) are sensitive to power quality. Conventional generators produce electricity with THD (Total Harmonic Distortion) of 15–25%, which can cause chargers to run hot or charge erratically. Inverter generators and inverter-based conventional generators produce THD below 3% — clean sine wave power that chargers prefer. For a site with many batteries charging simultaneously, an inverter generator or a conventional generator with an inverter module is worth the investment.
Top Picks for Jobsite Power
DuroMax XP10000EH (Dual Fuel, 10,000W): A jobsite workhorse. Handles multiple large power tools simultaneously, dual-fuel flexibility for propane use when gasoline is restricted, GFCI-protected 120V outlets and a 240V outlet for large equipment. Its robust frame and wheel kit make site transport manageable. Electric start eliminates pull-cord frustration after a long day.
DuroMax XP13000EH (13,000W): For larger crews or sites with particularly high power demands — concrete vibrators, large air compressors, welders — the XP13000EH provides the headroom. CO alert system with automatic shutdown adds a critical safety layer for enclosed or semi-enclosed site conditions.
Brave PRO Series: Built specifically for professional contractors, Brave generators feature commercial-grade engines, heavy-duty frames, and GFCI protection on all outlets. Their reputation for durability under daily transport and use makes them popular with crews who move generators between sites regularly.
GFCI and Site Safety
OSHA requires GFCI protection on all 120V outlets used on construction sites. Most modern generators include GFCI-protected outlets from the factory — verify this before purchase. For older generators without GFCI outlets, add GFCI adapters at every outlet. Never use standard extension cords on jobsites — use heavy-duty contractor-grade cords rated for the amperage you’re pulling.
Shop DuroMax, DuroStar, and Brave jobsite generators at Pro Tools Hub — we carry the full professional range with expert guidance on sizing for your specific site needs.
