The Airman EBOSS 25-25 is a diesel-battery hybrid energy system combining a 25 kVA Airman generator with 25 kWh of Lithium Titanate Oxide (LTO) battery storage. The EBOSS (Energy Battery Optimized Smart System) automatically manages power flow between the diesel generator and battery — running on battery alone during light loads, blending diesel and battery during peaks, and recharging during optimal engine load windows. This dramatically reduces fuel consumption, emissions, and noise compared to running a conventional diesel generator continuously.
The system features industry-first unlimited parallel capability for both generator input and power output, allowing multiple EBOSS units to scale seamlessly. LTO battery chemistry offers superior cycle life and fast charging compared to conventional lithium-ion. Built by Hokuetsu Industries in Japan with Airman's signature 110% fluid containment.
The EBOSS system represents a fundamentally different approach to portable power. Rather than sizing a diesel generator for peak load and running it continuously (often at inefficient partial loads), the EBOSS uses its LTO battery bank to absorb variable demand. During light-load periods — which can represent 60% or more of a typical construction day — the system runs entirely on stored battery power with zero fuel consumption, zero emissions, and zero noise. When the battery state-of-charge drops to a threshold, the Isuzu 4LE2T diesel engine starts automatically and runs at its most fuel-efficient load point to simultaneously serve the site load and recharge the battery. This "engine cycling" strategy means the diesel runs fewer hours per day, always at optimal load, producing less wear and lower emissions per kWh delivered. The unlimited paralleling capability allows multiple EBOSS 25-25 units to be connected for larger power requirements without derating or compatibility concerns.
The EBOSS 25-25 is the entry point in the hybrid lineup and the unit we deploy most frequently for noise-sensitive applications — outdoor events in San Francisco parks, film production in residential neighborhoods, and nighttime construction work where noise ordinances would otherwise prohibit diesel generators. The virtually silent battery-only operation during light-load periods is a genuine differentiator that no conventional portable generator can match.
Maintenance on the EBOSS follows the same 250-hour oil change schedule as the standard SDG25S for the diesel engine components. The LTO battery system requires minimal maintenance — periodic visual inspection of connections and cooling pathways. Because the diesel engine runs fewer hours per day than a conventional generator on the same application, service intervals effectively stretch further in calendar time. The primary operational consideration is ensuring the system is stored with adequate battery charge between deployments.
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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.
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Estimated runtime
168.4 hours(7.0 days)
Fuel consumption ≈ 1.19 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 25-25 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 25-25?
The Airman EBOSS 25-25 delivers 20 kW prime / 22 kW standby at 60 Hz (25 kVA), combined with 25 kWh of Lithium Titanate Oxide battery storage. The hybrid system allows the generator to handle peak demands that exceed the diesel engine output by drawing from the battery bank.
How does the EBOSS hybrid system work?
EBOSS (Energy Battery Optimized Smart System) combines the Isuzu 4LE2T diesel generator with a 25 kWh LTO battery bank in a single integrated unit. The system's intelligent power management automatically runs on battery alone during light loads, blends diesel and battery during peaks, and recharges the battery when the engine runs at its most fuel-efficient operating point. No manual switching is required.
What battery technology does the EBOSS use?
The EBOSS system uses Lithium Titanate Oxide (LTO) batteries — a chemistry specifically chosen for generator hybrid applications. LTO offers significantly faster charging than conventional lithium-ion, longer cycle life rated for thousands of charge-discharge cycles with minimal degradation, and reliable performance across a wider temperature range. This makes LTO better suited to the charge/discharge cycling typical of construction site power than standard Li-ion chemistry.
What is the fuel savings from the EBOSS system?
Fuel savings depend on the site's load profile, but typical savings range from 30% to 70% compared to running a conventional diesel generator continuously. The EBOSS 25-25 achieves the greatest savings on applications with variable or intermittent loads — construction sites, events, and film sets where actual load is well below generator capacity for extended periods.
How loud is the EBOSS 25-25?
When operating on battery power alone, the EBOSS 25-25 produces virtually zero noise — no engine running. This is quieter than any diesel-only generator at any rating. When the Isuzu 4LE2T diesel cycles on for battery recharging, noise levels are comparable to the standard SDG25S. The battery buffer means the diesel never needs to run during noise-sensitive hours if the battery state-of-charge is managed appropriately.
What are the service intervals for the EBOSS 25-25?
The Isuzu 4LE2T 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. Because the diesel runs fewer hours per day than a conventional generator, calendar-time service intervals effectively extend.
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 EBOSS 25-25, covering both diesel engine maintenance and LTO battery system inspection.
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