Hatz
Hatz 1D81C
1D Series
Hatz 1D81C 0.667L (approx.) 1-cylinder diesel engine for generator sets. 4.2 kWe standby at 50Hz / 5.1 kWe at 60Hz. U.S. EPA Tier 4 Interim. Air-cooled.
- Standby Power · 50 Hz
- 5 kVA
- Electrical Output
- 4 kWe
- Cylinders
- L1
- Displacement
- 0.667 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf · kWe estimated — see note below
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 4.2 | 3.8 | 4.7 |
| Standby Power | 4.7 | 4.2 | 5.3 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 5.1 | 4.6 | 5.7 |
| Standby Power | 5.7 | 5.1 | 6.4 |
Note: The manufacturer does not publish a separate kWe rating for this engine. kWe values shown are estimated from the rated mechanical output (kWm) using a conservative 90% alternator efficiency factor.
Hatz 1D81C generator set context
The Hatz 1D81C is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 5 kVA / 4 kWe / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Hatz |
| Model | 1D81C |
| Series | 1D Series |
| Configuration | L1 |
| Cylinders | 1 |
| Displacement | 0.667 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Air-Cooled |
| Emissions Standard | U.S. EPA Tier 4 Interim |
| Country of Origin | Germany |
Frequently asked questions
What is the power output of the Hatz 1D81C?
The Hatz 1D81C is rated at 5 kVA standby / 5 kVA prime at 50 Hz (1,500 rpm); and 6 kVA standby / 6 kVA prime at 60 Hz (1,800 rpm).
Does the 1D81C run at 50 Hz or 60 Hz?
The Hatz 1D81C is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Hatz 1D81C use?
The Hatz 1D81C is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 1D81C?
The Hatz 1D81C is an inline-1 (1-cylinder) engine with a displacement of 0.667 L.
What emissions standard does the 1D81C meet?
The Hatz 1D81C is certified to U.S. EPA Tier 4 Interim emissions standards.
Is the Hatz 1D81C still in production?
Yes — the Hatz 1D81C is a current production model.
Is a datasheet available for the 1D81C?
Yes — an official Hatz datasheet for the Hatz 1D81C can be downloaded from this page.
Related Engines
Reference
- Canonical page
- /engines/hatz-1d81c
- Last database update
- 2026-06-11
- Manufacturer files
- 1 datasheet linked
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