The Doosan G50 delivers 38 kW of prime power (48 kVA) from the same Doosan D24 engine platform used in the smaller G40, sharing the same compact 130.5" x 72.8" enclosure. The 110-gallon integral fuel tank provides 37.2 hours of runtime at full load — a strong advantage for multi-day construction operations.
The G50 slots between the G40 and G70 as a mid-range option for buyers needing more power than 31 kW without stepping up to the larger G70 chassis. Dual-frequency switching (50/60 Hz) comes standard. Also sold as the Bobcat PG50.
The G50 shares the exact same CoolBox enclosure footprint (130.5" x 72.8") and D24 engine platform as the G40. For rental fleet operators running both models, this means common filters, common service procedures, and interchangeable enclosure panels. The D24 achieves Tier 4 Final compliance through DOC aftertreatment only — no DPF and no regeneration cycles to manage.
The 37.2-hour runtime at full load from the 110-gallon tank is a standout specification. The D24 running at 38 kW consumes less fuel per kW than the G40 at its rated 31 kW, making the G50 the more fuel-efficient choice when your load genuinely needs the extra capacity.
OnPoint services Doosan G50 units in the same fleet visits as G40 units — the shared D24 engine and CoolBox enclosure mean our technicians carry the same filters and follow the same procedures for both models. The 250-hour oil change interval and 500-hour fuel filter interval keep maintenance predictable. In Northern California rental fleets, the G50's extended runtime reduces the number of fuel deliveries needed on remote construction sites, which translates to real cost savings on logistics.
Engineering specifications
Physical
Length
130.5 in
Width
72.8 in
Height
78.4 in
Wet weight
3,930 lb
Acoustic
Sound @ 7m, full load
64 dBA
Enclosure
Sound-attenuated
Fuel system & runtime
Integral fuel tank
110 gal
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Get pricing & lead time on the Doosan G50
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
48.5 hours(2.0 days)
Fuel consumption ≈ 2.27 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 Doosan G50 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 250 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 flow, hard starting, power loss under load
500+
minor
Battery
Failed to start or slow cranking after extended storage
4,380+
minor
Coolant hoses
Weeping at clamp connections, slow coolant loss
5,000+
minor
Frequently Asked Questions
What is the standby power rating of the Doosan G50?
The Doosan G50 delivers 42 kW standby and 38 kW prime power. It shares the same Doosan D24 engine platform and CoolBox enclosure dimensions as the G40, making it a compact step-up option. Also sold as the Bobcat PG50.
What engine does the Doosan G50 use?
The G50 is powered by a Doosan D24 2.4-liter inline-4 naturally aspirated diesel engine running at 1,800 RPM — the same engine as the G40. The D24 achieves EPA Tier 4 Final through DOC-only aftertreatment with no DPF or DEF required.
What are the service intervals for the Doosan G50?
Oil changes are due every 250 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 G50 shares all service items with the G40, simplifying fleet maintenance.
Is the Doosan G50 EPA compliant?
Yes. The G50 is EPA Tier 4 Final compliant. The D24 engine meets current U.S. emissions standards through DOC aftertreatment. The unit also supports 50/60 Hz dual-frequency switching as standard.
How does Doosan compare to MQ Power at the 50 kVA class?
Both deliver comparable power in the 45-50 kVA class. The G50 typically prices 15-30% below MQ Power. The G50's standout advantage is the 37.2-hour full-load runtime from the 110-gallon tank — significantly longer than most competitors in this class.
What control panel does the Doosan G50 use?
The G50 uses the same integrated digital control panel as the G40, with auto-start, fault monitoring, voltage/frequency displays, and runtime tracking housed in the CoolBox enclosure for weather protection.
Who services Doosan generators in Northern California?
OnPoint Generators services Doosan G-Series portable generators across the Bay Area and Northern California. The G50 shares all service procedures and parts with the G40, so fleet operators running both models benefit from a single service visit.
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