The Airman EBOSS 125-65 is a diesel-battery hybrid energy system combining a 125 kVA Airman generator with 65 kWh of Lithium Titanate Oxide (LTO) battery storage. The mid-range EBOSS unit serves larger construction sites and events where fuel savings and noise reduction are critical. At 100 kW prime / 110 kW standby, the EBOSS 125-65 delivers building-scale temporary power capacity with the fuel and noise advantages that define the EBOSS platform. Automatic power management between diesel and battery optimizes fuel efficiency and reduces emissions.
Features unlimited parallel capability. LTO battery chemistry for superior cycle life. Built by Hokuetsu Industries in Japan with 110% fluid containment.
The EBOSS 125-65 brings hybrid technology to the 100 kW class — the threshold where most building-scale temporary power needs are met. The Isuzu BR-4HK1X diesel engine provides the same proven platform used in Airman's conventional SDG125, paired with a 65 kWh LTO battery bank. At this capacity, the EBOSS system can run full building loads (HVAC, elevators, lighting) on battery power alone during off-peak hours, with the diesel engine cycling on during higher-demand periods. The intelligent power management continuously optimizes the balance between battery state-of-charge, site load demand, and diesel engine efficiency. Multiple EBOSS 125-65 units can be paralleled without limit for sites requiring capacity beyond 100 kW, and the system scales linearly — two units deliver 200 kW of hybrid capacity with the same fuel-saving behavior.
The EBOSS 125-65 is the sweet spot in the hybrid lineup for our Northern California commercial construction projects. At 100 kW prime, it covers the same building-scale loads as our conventional SDG125 fleet — hospital renovation phases, office building temporary power, and data center commissioning — but with dramatically lower fuel consumption and the ability to operate silently during noise-restricted hours. We have deployed it on projects in downtown San Francisco where nighttime noise ordinances would otherwise shut down generator-dependent work.
The diesel engine components follow the standard 250-hour oil change schedule using the same Isuzu BR-4HK1X platform as the conventional SDG125. The LTO battery system has proven low-maintenance in our fleet, requiring only periodic visual inspection. The most significant operational benefit we have observed is that the diesel engine accumulates approximately 40-60% fewer operating hours per calendar day compared to a conventional generator serving the same load profile, which translates to longer intervals between service visits, reduced fuel logistics, and lower total cost of ownership over the rental period.
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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
33.7 hours(1.4 days)
Fuel consumption ≈ 5.94 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 125-65 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 125-65?
The Airman EBOSS 125-65 delivers 100 kW prime / 110 kW standby at 60 Hz (125 kVA), combined with 65 kWh of Lithium Titanate Oxide battery storage. At this capacity, the hybrid system can run full building-scale temporary loads on battery power alone during off-peak hours.
How does the EBOSS hybrid system work?
EBOSS (Energy Battery Optimized Smart System) combines the Isuzu BR-4HK1X diesel generator with a 65 kWh LTO battery bank in a single integrated unit. The intelligent power management continuously optimizes the balance between battery state-of-charge, site load demand, and diesel engine efficiency — running on battery alone during light loads, blending during peaks, and recharging during optimal engine windows.
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 wider temperature range. LTO is specifically suited to the high-frequency charge/discharge cycling of construction site hybrid power.
What is the fuel savings from the EBOSS 125-65?
Typical savings range from 30% to 70% compared to running a conventional diesel generator continuously. Our fleet data shows the Isuzu BR-4HK1X in the EBOSS 125-65 accumulates approximately 40-60% fewer operating hours per calendar day compared to a conventional SDG125 serving the same load profile — translating to fewer oil changes, less fuel, and lower total cost of ownership.
How loud is the EBOSS 125-65?
When operating on battery power alone, the EBOSS 125-65 produces virtually zero noise — enough silent capacity to power full building-scale temporary loads without any audible diesel engine. When the Isuzu BR-4HK1X cycles on for recharging, noise levels are comparable to the standard SDG125 platform. The battery buffer enables timing engine cycles outside noise-restricted hours.
What are the service intervals for the EBOSS 125-65?
The Isuzu BR-4HK1X 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 engine hours in hybrid operation extend calendar-time intervals between service visits.
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 125-65, covering both diesel engine maintenance and LTO battery system inspection.
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