The Airman EBOSS 70-45 is a diesel-battery hybrid energy system combining a 70 kVA Airman generator with 45 kWh of Lithium Titanate Oxide (LTO) battery storage. The EBOSS system automatically manages power flow — running on battery alone during light loads, blending during peaks, and recharging during optimal engine windows. This dramatically reduces fuel consumption, emissions, and noise for noise-sensitive sites like urban construction and events. At 56 kW prime, the EBOSS 70-45 sits in the mid-range of the hybrid lineup, providing enough capacity for most commercial construction temporary power needs while delivering the fuel and noise advantages that define the EBOSS platform.
Features unlimited parallel capability for both generator input and power output. LTO battery chemistry offers superior cycle life and fast charging. Built by Hokuetsu Industries in Japan with 110% fluid containment.
The EBOSS 70-45 steps up to the Isuzu 4JJ1X engine platform and a 45 kWh LTO battery bank — a meaningful increase in both diesel capacity and stored energy over the entry-level EBOSS 25-25. The larger battery bank extends battery-only runtime during light-load periods, which is where the EBOSS system delivers its most dramatic fuel savings and noise elimination. During variable-load construction days, the intelligent power management system keeps the diesel engine off for longer stretches, cycling it on only at optimal load points for efficient recharging. The 70 kVA rating covers the power needs of most mid-size commercial construction sites: temporary building power, tower crane support, welding machines, and concrete pumps. The unlimited paralleling capability means multiple EBOSS 70-45 units can be linked for larger sites without derating.
The EBOSS 70-45 is our go-to recommendation for urban construction projects in the Bay Area where noise restrictions are enforced. San Francisco, Oakland, and Palo Alto all have daytime noise ordinances that conventional diesel generators can struggle with on sites adjacent to occupied buildings. The EBOSS 70-45's battery-only mode allows work to proceed during noise-sensitive hours, with the diesel engine cycling on during less restricted periods for recharging.
On the maintenance side, the Isuzu 4JJ1X diesel components follow the standard 250-hour oil change schedule. The LTO battery system requires minimal maintenance — periodic visual inspection and connection checks. A key operational advantage we have observed is that the diesel engine accumulates fewer operating hours per calendar day compared to a conventional generator on the same site, which effectively extends service intervals in calendar time. The primary consideration between deployments is ensuring the battery system is stored with adequate charge to maintain cell health.
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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
61.7 hours(2.6 days)
Fuel consumption ≈ 3.24 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 70-45 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 70-45?
The Airman EBOSS 70-45 delivers 56 kW prime / 60 kW standby at 60 Hz (70 kVA), combined with 45 kWh of Lithium Titanate Oxide battery storage. The larger battery bank compared to the EBOSS 25-25 extends battery-only runtime during light-load periods.
How does the EBOSS hybrid system work?
EBOSS (Energy Battery Optimized Smart System) combines the Isuzu 4JJ1X diesel generator with a 45 kWh LTO battery bank in a single integrated unit. The intelligent power management system 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 load point. The 4JJ1X only cycles on when needed — always at optimal efficiency.
What battery technology does the EBOSS use?
The EBOSS system uses Lithium Titanate Oxide (LTO) batteries — a chemistry chosen for its faster charging rate than conventional lithium-ion, longer cycle life rated for thousands of charge-discharge cycles, and reliable performance across a wide temperature range. LTO is better suited to the high-frequency charge/discharge cycling of construction site hybrid power than standard Li-ion chemistry.
What is the fuel savings from the EBOSS 70-45?
Typical savings range from 30% to 70% compared to running a conventional diesel generator continuously. The 45 kWh battery bank in the EBOSS 70-45 can independently carry substantial loads for extended periods, meaning the diesel engine runs significantly fewer hours per day than a conventional SDG65S serving the same load profile.
How loud is the EBOSS 70-45?
When operating on battery power alone, the EBOSS 70-45 produces virtually zero noise. This is a meaningful advantage over any diesel-only 70 kVA generator on noise-sensitive urban construction sites and outdoor events. When the Isuzu 4JJ1X cycles on for recharging, noise levels are comparable to the standard SDG65S platform — but with the flexibility to time engine cycles during less noise-sensitive hours.
What are the service intervals for the EBOSS 70-45?
The Isuzu 4JJ1X 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 accumulates fewer operating hours per day in hybrid mode, 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 70-45, covering both diesel engine maintenance and LTO battery system inspection.
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