The Airman EBOSS 400-220 is the flagship of the EBOSS hybrid energy system lineup — combining a 400 kVA Airman generator with 220 kWh of Lithium Titanate Oxide (LTO) battery storage. The largest hybrid system Airman offers, it delivers 320 kW prime / 336 kW standby with massive fuel savings and emissions reduction for large construction sites, data centers, and temporary facility power. The 220 kWh battery bank can independently power significant loads for extended periods, with the Isuzu 6WG1X diesel engine cycling on only when battery state-of-charge requires it.
Features unlimited parallel capability for scaling beyond single-unit capacity. LTO battery chemistry for superior cycle life and fast charging. Built by Hokuetsu Industries in Japan with 110% fluid containment. A genuinely unique product — no other portable generator manufacturer offers integrated hybrid systems at this scale.
The EBOSS 400-220 represents the pinnacle of portable hybrid power generation. The Isuzu 6WG1X diesel engine is paired with a 220 kWh LTO battery bank — the largest in the EBOSS lineup and enough stored energy to run substantial loads independently for hours. At this scale, the fuel savings become economically significant: a conventional 400 kVA diesel generator burning fuel 24/7 on a multi-month deployment represents tens of thousands of dollars in fuel cost. The EBOSS 400-220's intelligent power management eliminates that waste by running the diesel engine only when needed and always at its most efficient operating point. The unlimited paralleling capability means that even 320 kW is not a ceiling — multiple units can be linked for campus-scale power requirements while maintaining the same hybrid efficiency. For data center temporary power, the 220 kWh battery bank provides instantaneous load response during diesel engine startup cycles, delivering a level of power quality that conventional diesel-only generators cannot match.
The EBOSS 400-220 is a specialized asset in our fleet, deployed on the largest projects where the fuel savings and environmental compliance advantages justify its position at the top of the EBOSS lineup. We have placed it on major infrastructure projects and data center commissioning work where the combination of 320 kW prime capacity, silent battery-only operation during noise-restricted hours, and reduced emissions made it the clear choice over conventional diesel generation.
At this power class, fuel logistics are a significant operational consideration — and the EBOSS 400-220 dramatically simplifies them. The reduced diesel engine run hours mean fewer fuel deliveries, less on-site fuel storage, and a smaller spill risk profile. The Isuzu 6WG1X diesel components follow the standard 250-hour oil change schedule, and the LTO battery system requires only periodic visual inspection. For fleet operators evaluating the EBOSS 400-220, the total cost of ownership calculation should include not just fuel savings but also reduced fuel delivery logistics, lower maintenance frequency due to fewer engine hours, and the ability to operate on noise-sensitive sites where a conventional 400 kVA diesel generator would be prohibited.
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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
11.0 hours(0.5 days)
Fuel consumption ≈ 18.14 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 Airman EBOSS 400-220 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
Clogging from contaminated or stale diesel causes hard starting and power loss — replace at 500-hour intervals or sooner if fuel quality is suspect
500+
minor
Starting battery
Capacity degradation during extended storage without a maintainer — test under load at every service visit and replace proactively at 36 months
4,380+
minor
Coolant hoses
Weeping at clamp points from thermal cycling — inspect during every oil change and replace at first sign of swelling or seepage
5,000+
minor
Frequently Asked Questions
What is the prime rating of the EBOSS 400-220?
The Airman EBOSS 400-220 delivers 320 kW prime / 336 kW standby at 60 Hz (400 kVA) — the flagship of the EBOSS lineup. Combined with 220 kWh of Lithium Titanate Oxide battery storage, it is the largest integrated hybrid portable generator available from any manufacturer.
How does the EBOSS hybrid system work?
EBOSS (Energy Battery Optimized Smart System) combines the Isuzu 6WG1X diesel generator with a 220 kWh LTO battery bank in a single integrated unit. Intelligent power management runs on battery alone during light loads, blends diesel and battery during peaks, and recharges the battery when the engine runs at its most efficient load point. At 320 kW prime, the 220 kWh battery bank can independently carry substantial loads for hours before the diesel needs to activate.
What battery technology does the EBOSS use?
The EBOSS system uses Lithium Titanate Oxide (LTO) batteries — chosen for faster charging than conventional lithium-ion, longer cycle life rated for thousands of charge-discharge cycles with minimal degradation, and reliable performance across a wide temperature range. At 220 kWh, the EBOSS 400-220 battery bank provides instantaneous load response during diesel startup cycles — a level of power quality conventional diesel generators cannot match.
What is the fuel savings from the EBOSS 400-220?
Typical savings range from 30% to 70% compared to running a conventional 400 kVA diesel generator continuously. At this scale, even a 30% reduction represents tens of thousands of dollars in fuel cost saved over a multi-month deployment, plus reduced fuel delivery logistics and smaller on-site fuel storage requirements.
How loud is the EBOSS 400-220?
When operating on battery power alone, the EBOSS 400-220 produces virtually zero noise — delivering 320 kW of capacity silently. This is a capability no conventional diesel generator at this power class can approach. When the Isuzu 6WG1X cycles on for recharging, noise levels are comparable to the SDG400 platform. The 220 kWh battery buffer enables timing diesel cycles outside noise-restricted hours on large urban construction sites.
What are the service intervals for the EBOSS 400-220?
The Isuzu 6WG1X diesel engine requires oil and filter changes every 500 hours or 12 months (whichever comes first), air filter at 500 hours, fuel filter at 500 hours, and major overhaul at 20,000 hours. The LTO battery system requires inspection every 1,000 hours. Reduced diesel operating hours in hybrid mode extend calendar-time intervals and lower annual maintenance costs compared to running a conventional 400 kVA generator.
Who services Airman EBOSS generators in Northern California?
OnPoint Generators is the authorized Airman service provider for Northern California. We service the full EBOSS hybrid lineup including the flagship EBOSS 400-220, covering both diesel engine maintenance and LTO battery system inspection.
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