Use manufacturer examples and a power-unit calculator to separate electrical output, duty rating and engine application data.
6 research references 6 source domains · See evidence & scopeExplore the published evidence behind each supplier and build your own shortlist.
AGG Power Technology (Fuzhou) Co., Ltd.
AS250D6 specification separates prime 225 kVA / 180 kW from standby 250 kVA / 200 kW at 60 Hz.
Manufacturer product pageConfirm the 50 Hz equivalent rating and the complete-set configuration behind the model sheet.
Fuzhou Hosem Power Co., Ltd.
A-SH550 table names an SDEC engine and separates Rate Power 500 kVA / 400 kW from Max. Power 550 kVA / 440 kW at 50 Hz.
Manufacturer product pageAsk how the maker defines Rate Power versus Max. Power and which applies to your duty.
Guangxi Dingbo Generator Set Manufacturing Co., Ltd.
DB-200GF set data lists 200 kW / 250 kVA at 50 Hz, 400/230 V, with a Deutz BF6M1015-GA engine.
Manufacturer product pageAsk whether the published output is a prime or standby rating and request the matching test record.
| Compare evidence | AGG Power ↗ | Hosem Power ↗ | Dingbo Power ↗ |
|---|---|---|---|
| Location | Fuzhou, Fujian | Fuzhou, Fujian | Nanning, Guangxi |
| Business type | Manufacturer (own website) | Manufacturer (own website) | Manufacturer (own website) |
| Published evidence | AS250D6 specification separates prime 225 kVA / 180 kW from standby 250 kVA / 200 kW at 60 Hz. | A-SH550 table names an SDEC engine and separates Rate Power 500 kVA / 400 kW from Max. Power 550 kVA / 440 kW at 50 Hz. | DB-200GF set data lists 200 kW / 250 kVA at 50 Hz, 400/230 V, with a Deutz BF6M1015-GA engine. |
| Ask before comparing | Confirm the 50 Hz equivalent rating and the complete-set configuration behind the model sheet. | Ask how the maker defines Rate Power versus Max. Power and which applies to your duty. | Ask whether the published output is a prime or standby rating and request the matching test record. |
How this list was made. Selected from the suppliers cited in this article's research, across marketplaces and manufacturer sites — not ranked by quality. Listings are supplier disclosures; no factory visits, product tests or current quotations are claimed. Category illustrations are original concept images. Our research method ↗
The equation is kW = kVA × power factor. This converts electrical units; it does not make a standby rating suitable for prime operation or determine the generator size required by a site.
250 kVA = 200 kW ÷ 0.8
Unit conversion only. This does not size a generator, allow for motor starting, or convert standby output into prime output. Use the rated power factor for the actual model.
Generator duty ratings describe different operating conditions. A supplier's published model sheet should identify which rating applies to the offer. Do not apply one universal percentage to convert every maker's standby output into prime output.
| Source / model | Frequency | Published output | Interpretation |
|---|---|---|---|
| AGG AS250D6[1] | 60 Hz | Prime 225 kVA / 180 kW; standby 250 kVA / 200 kW | A 200 kW standby offer is not a 200 kW prime offer. |
| Hosem A-SH550[2] | 50 Hz | Rate Power 500 kVA / 400 kW; Max. Power 550 kVA / 440 kW | Preserve the labels used by the source; request its duty definitions. |
| Dingbo DB-200GF[6] | 50 Hz | Set output 200 kW / 250 kVA | Maker-published set data with a Deutz BF6M1015-GA engine; the page does not state a prime or standby designation. |
No. Frequency is part of the specification, and changing speed may change published application ratings. The Cummins G-Drive C-Series page illustrates the distinction for the same engine model. It is engine application data, not a complete generating-set quotation.
| Frequency | Speed | Prime kVA / kW | Standby kVA / kW |
|---|---|---|---|
| 50 Hz | 1,500 rpm | 200 / 160 | 220 / 176 |
| 60 Hz | 1,800 rpm | 230 / 184 | 255 / 204 |
The same source lists this engine application as Non-Regulated. A familiar engine brand or compatible kW figure alone does not establish destination emissions compliance.
Supply a load schedule that identifies running demand, starting motors, step loads and sensitive equipment. Record ambient temperature and altitude, and ask the selected maker for its model-specific output and transient-performance confirmation at those conditions. Keep those engineering checks separate from the simple unit calculation above.
Use one line that includes model, rating designation, kW, kVA, power factor, frequency, voltage and phases. Require exceptions to be written into the quotation. Match that line against the offered datasheet and the final acceptance-test record; do not substitute an engine brochure for the complete-set data.
Apply these checks to listing prices · Download the RFQ template
Caterpillar distinguishes backup ratings, prime operation with varying load, and continuous operation with a non-varying load. The paper attaches operating conditions to its categories; the headline output alone does not describe the permitted duty. [4]
Use & limitsThese are Cat’s published categories. They are not a translation table for every maker’s terms.
Editorial checklist
AGN 087 defines power factor as the relationship between active kWe and apparent kVA. For a buyer brief, retain both quantities and the relevant load condition. [5]
Use & limitsA kW/kVA conversion is arithmetic, not an equipment-sizing result.
Editorial checklist
Output, duty and site conditions
Model, components and delivery basis
Entity, documents and test scope
Clarify exceptions before comparing
6 references. Each record keeps its own review date. A manufacturer disclosure is not an independent test; a retrieval date is not a price-effective date. Hover, focus or tap a numbered reference to inspect its source.
Use & limits
One generating-set model; not a test performed by ChinaManufacturer.
Named source page / model table; see recorded evidence
Publication date not stated · Original public record · Reviewed 2026-10-19AS250D6: 60 Hz, 1,800 rpm; standby 250 kVA/200 kW; prime 225 kVA/180 kW.
Use & limits
A-SH550 table; preserve original labels Max. Power and Rate Power rather than silently equating them to ISO ratings.
Named source page / model table; see recorded evidence
Publication date not stated · Original public record · Reviewed 2026-10-19A-SH550: 50 Hz; Rate Power 500 kVA/400 kW; Max. Power 550 kVA/440 kW. Engine SDEC SC25G690D2.
Use & limits
G-Drive engine application ratings; not a complete generator-set offer.
Named source page / model table; see recorded evidence
Publication date not stated · Original public record · Reviewed 2026-10-196CTAA8.3-G7: at 50 Hz, prime 200 kVA/160 kW and standby 220 kVA/176 kW; at 60 Hz, prime 230 kVA/184 kW and standby 255 kVA/204 kW. Listed Non-Regulated.
Use & limits
Cat rating definitions; retain the named category and its conditions. Do not map every commercial label directly to an ISO designation.
Sections Standby, Emergency Standby Power, Prime, Continuous
Publication date not stated · Web edition; publication date not stated · Reviewed 2026-10-22Cat distinguishes backup duty, varying-load prime duty and constant-load continuous duty, with operating limits for each.
Use & limits
Actual load power factor is not fixed at 0.8; a unit conversion does not validate engine output or size a complete set.
PDF p.1, Definitions; subsequent capability discussion
Publication date not stated · Issue C; date not established · Reviewed 2026-10-22Power factor relates active kWe to apparent kVA. Conventional alternator ratings use 0.8 lagging power factor.
Use & limits
One generating-set model published by its maker; the duty designation is not stated on the page.
Named source page / model table; see recorded evidence
Publication date not stated · Original public record · Reviewed 2026-10-29DB-200GF: 200 kW / 250 kVA, 50 Hz, 400/230 V, power factor 0.8; Deutz BF6M1015-GA engine.
Compare supplier evidence, understand advertised prices and turn a power requirement into a usable generator RFQ.
Three public listing examples show why a price needs an exact configuration, rating and commercial basis before it can be compared.
Read association and government figures with their original periods, units and product coverage intact.
A supplier evidence comparison, certificate checks and an RFQ template for shortlisting generator offers.
Follow the engine, alternator, controls and transfer interface, then ask for evidence for the complete package.
Keep the manufacturer’s duty definition with the number before comparing generator capacity.
Build an engineering brief that captures running demand, starting events and acceptable recovery.
Compare weather protection, acoustic evidence and service access as separate requirements.
Use named company and government records to distinguish engine plants, alternator factories and complete-set assembly.
Create a common specification, inclusion list and evidence request for every candidate.
Resolve technical and delivery differences before comparing quotation totals.
Agree what each test proves, what remains to be checked and which records link to the delivered set.
Separate component identity, complete-set assembly, authorization and warranty evidence.
Read the story, inspect its sources and take the ideas into your own sourcing questions. Article tools keep the page beside the conversation.
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