What engine does the Atlas Copco QAS 700 use?

The QAS 700 is powered by a Volvo TWD1683GE 16.1-liter inline-6 diesel engine running at 1,800 RPM, paired with a Leroy Somer LSA 47.2 L9 alternator. The TWD1683GE is the higher-output Volvo variant vs. the TWD1672GE in the QAS 625.

What are the service intervals for the QAS 700?

Oil changes are due every 500 hours or 12 months, whichever comes first. Air filter and fuel filter replacement intervals are 500 hours. Major engine overhaul is specified at 20,000 hours. The 43.4-gallon DEF tank requires periodic refill for Tier 4 Final SCR compliance — the largest DEF tank in the QAS lineup.

Is the Atlas Copco QAS 700 EPA Tier 4 Final compliant?

Yes. The QAS 700 is EPA Tier 4 Final and CARB compliant, legal for operation throughout California. The Volvo TWD1683GE uses SCR aftertreatment with a 43.4-gallon DEF tank — the largest in the QAS lineup, sized for extended operations.

How does the QAS 700 compare to the QAS 625?

The QAS 700 delivers 560 kW prime vs. the QAS 625's 500 kW using the higher-output Volvo TWD1683GE vs. the TWD1672GE. Both share a 707-gallon fuel tank. The QAS 700 operates at 76 dBA at 7 meters and includes a larger 43.4-gallon DEF tank. The QAS 625 offers multi-voltage output options vs. the QAS 700's three-phase-only 277/480V.

What fuel does the Atlas Copco QAS 700 use?

The QAS 700 runs on diesel with DEF required for SCR aftertreatment. The 707-gallon integral diesel tank provides extended runtime at partial load. The 43.4-gallon DEF tank is the largest in the QAS lineup, designed for multi-day operations without refueling logistics complications.

Who services Atlas Copco generators in Northern California?

OnPoint Generators provides local service support for Atlas Copco QAS units including the Volvo-powered QAS 700 across Northern California. At 560 kW, downtime costs thousands per hour — we offer faster scheduling than the Atlas Copco factory service network and experience across the full QAS lineup.

Atlas Copco · QAS Series

Atlas Copco QAS 700

Name: Atlas Copco QAS 700
Brand: Atlas Copco
Availability: PreOrder

616 kW standby / 560 kW prime · Diesel · Liquid-cooled

700 kVA (560 kW prime) portable diesel generator. Flagship Swedish-engineered QAS series with Volvo 16.1L engine.

Standby power: 616 kW / 560 kW prime
Voltage options: 277/480V
Frequency / Phase: 60 Hz · 3-phase
Engine: Volvo TWD1683GE · 16.12L
EPA / Emissions: Tier 4 Final
Alternator: Leroy Somer LSA 47.2 L9

Commercialrental-fleettemporary-powerData Centers

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Overview#

The Atlas Copco QAS 700 VD is the flagship of the QAS portable generator series — a 700 kVA unit powered by a Volvo TWD1683GE 16.1L inline-6 engine. Delivering 560 kW prime / 616 kW standby, it is the largest single-engine portable generator in the Atlas Copco US lineup. The sound-attenuated enclosure keeps noise to 76 dBA at 7 meters at 75% load — remarkably quiet for 560 kW, and 5-8 dB lower than most competitors in the 500+ kW portable class. EPA Tier 4 Final with SCR aftertreatment, CARB compliant, and legal for operation throughout California without restriction.

Technical highlights#

The QAS 700 pairs the Volvo TWD1683GE 16.1L heavy-duty platform with a Leroy Somer LSA 47.2 L9 alternator featuring Class H insulation and voltage regulation within ±0.25%. The engine runs at 1800 RPM and is one of Volvo's most proven industrial power platforms, used across marine, mining, and power generation applications worldwide. A 707-gallon integral diesel tank and 43.4-gallon DEF tank — both the largest in the QAS lineup — provide extended runtime for multi-day operations without refueling infrastructure. Three-phase 277/480V output at 60 Hz and excellent paralleling capability allow the QAS 700 to serve as a standalone prime mover or as part of a multi-unit temporary power plant for loads exceeding 1 MW.

Our service experience#

The QAS 700 represents Atlas Copco's best engineering: Swedish design, Volvo power, Leroy Somer alternator, and a quiet, compact package for 560 kW. It is a genuinely impressive machine. Where Atlas Copco falls short — and this matters more at 560 kW where downtime costs thousands of dollars per hour — is after-sale service. Unreturned calls, $311+/hr travel charges, and parts delays are the most common complaints from fleet operators and rental houses in Northern California. The Volvo TWD1683GE is a well-supported platform with a strong dealer network, but Atlas Copco's own service layer adds friction. OnPoint provides a local Bay Area and NorCal service alternative — responsive scheduling, transparent pricing, and technicians experienced with heavy-duty Volvo engines and Leroy Somer alternators. If you own or rent QAS 700 units in Northern California, we are here to keep them running.

Engineering specifications

Acoustic

Sound @ 7m, 75% load: 76 dBA
Enclosure: Sound-attenuated

Fuel system & runtime

Integral fuel tank: 707 gal
DEF tank: 43.4 gal

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Estimate runtime for the Atlas Copco QAS 700

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

Estimate runtime on this tank

Generator size

Fuel

Fuel tank capacity

gal

Load

Override full-load GPH (optional)

GPH

Estimated runtime

21.3 hours(0.9 days)

Fuel consumption ≈ 33.26 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.

Service intervals

Manufacturer-recommended intervals for the Atlas Copco QAS 700 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter: Every 500 hours or 12 months
Air filter: Every 500 hours
Fuel filter: Every 500 hours
Major overhaul: ≈ 20,000 hours

Common failure modes

What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.

Component	Symptom	Typical hours	Severity
Fuel filter	Restricted fuel flow, reduced power, hard starting	500+	minor
Battery	Failed to start, slow crank, low voltage warning	4,380+	minor
Coolant hose	Weeping coolant at hose connections, low coolant alarm	5,000+	minor

Frequently Asked Questions

What is the prime and standby rating of the Atlas Copco QAS 700?: The QAS 700 delivers 560 kW prime power and 616 kW standby power. It is the largest single-engine portable generator in the Atlas Copco US lineup and the flagship of the QAS series.
What engine does the Atlas Copco QAS 700 use?: The QAS 700 is powered by a Volvo TWD1683GE 16.1-liter inline-6 diesel engine running at 1,800 RPM, paired with a Leroy Somer LSA 47.2 L9 alternator. The TWD1683GE is the higher-output Volvo variant vs. the TWD1672GE in the QAS 625.
What are the service intervals for the QAS 700?: Oil changes are due every 500 hours or 12 months, whichever comes first. Air filter and fuel filter replacement intervals are 500 hours. Major engine overhaul is specified at 20,000 hours. The 43.4-gallon DEF tank requires periodic refill for Tier 4 Final SCR compliance — the largest DEF tank in the QAS lineup.
Is the Atlas Copco QAS 700 EPA Tier 4 Final compliant?: Yes. The QAS 700 is EPA Tier 4 Final and CARB compliant, legal for operation throughout California. The Volvo TWD1683GE uses SCR aftertreatment with a 43.4-gallon DEF tank — the largest in the QAS lineup, sized for extended operations.
How does the QAS 700 compare to the QAS 625?: The QAS 700 delivers 560 kW prime vs. the QAS 625's 500 kW using the higher-output Volvo TWD1683GE vs. the TWD1672GE. Both share a 707-gallon fuel tank. The QAS 700 operates at 76 dBA at 7 meters and includes a larger 43.4-gallon DEF tank. The QAS 625 offers multi-voltage output options vs. the QAS 700's three-phase-only 277/480V.
What fuel does the Atlas Copco QAS 700 use?: The QAS 700 runs on diesel with DEF required for SCR aftertreatment. The 707-gallon integral diesel tank provides extended runtime at partial load. The 43.4-gallon DEF tank is the largest in the QAS lineup, designed for multi-day operations without refueling logistics complications.
Who services Atlas Copco generators in Northern California?: OnPoint Generators provides local service support for Atlas Copco QAS units including the Volvo-powered QAS 700 across Northern California. At 560 kW, downtime costs thousands per hour — we offer faster scheduling than the Atlas Copco factory service network and experience across the full QAS lineup.

More in the QAS Series

Atlas Copco's portable diesel workhorse — 22 to 616 kW, Tier 4 Final, Leroy Somer alternators, 5–8 dB quieter than the competition.

View all 14models in this series →

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