Overview#
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.
EBOSS Hybrid Technology#
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.
Our Service Experience#
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.
