24.8kVA Three Phase Alternator STRO-25K

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Bradley: +27 62 743 5089 | bradley@sdecpower.co.za
Ruan: +27 66 511 2009 | ruan@sdecpower.co.za

We offer industry leading 24 month / 1,000 hour warranties on our engines and diesel generators.

The StromerPower 24.8kVA Three Phase Alternator (STRO-25K) is a high quality, brushless alternator engineered for diesel generators, mobile power units, and industrial machinery. It delivers exceptional motor starting capacity, making it easy to run heavy machinery under demanding conditions.

  • Power Capacity: Supplies 22.5kVA prime and up to 24.8kVA standby power at a steady 50Hz frequency.
  • Automatic Voltage Regulation: Employs an SX460 AVR to keep voltage stable within 1%, protecting electronics from sudden spikes.
  • Clean Electrical Output: Utilises a low distortion winding layout to keep total harmonic distortion under 5% for a smooth, reliable supply.
  • Durable Single Bearing Design: Engineered for alignment with standard SAE engine housings, wrapped in a weather protective IP23 enclosure.

We offer delivery across Sub-Saharan Africa at the best prices.

SUPERIOR QUALITY AND PERFORMANCE

StromerPower sets new global standards in all aspects, from design, manufacturing, material selection, production and testing equipment, tooling, and quality control.

GENERAL SPECIFICATIONS

StomerPower 24.8kVA Alternator

The StromerPower STRO-25K is a rugged 24.8kVA 3 phase alternator built for diesel generator and mobile power units. Running at 1500rpm, this 4-pole brushless unit is designed for commercial workshops, farming setups, and backup installations. It provides a steady, balanced electrical output across all three phases to keep your core equipment and electronics running normally when the main grid fails.

StromerPower 24.8kVA Alternator Key Features

  • Reliable Power: Delivers a continuous 22.5kVA prime power and up to 24.8kVA standby output for emergency backup.
  • Built-In AVR: Equipped with an SX460 Automatic Voltage Regulator module to lock output voltage within 1%, protecting equipment from sudden surges or sags.
  • High Efficiency Windings: Built with high quality copper winding that maximise electrical conversion, helping reduce overall engine fuel consumption under load.
  • Low Vibration Operation: A balanced rotor design keep vibrations to a minimum, making it ideal for acoustic canopy enclosures.
  • Compact Steel Frame: Heavy duty steel construction with a compact footprint, designed to bolt down easily onto standard industrial generator bases.
  • Industrial Protection: Fitted with Class H thermal insulation and an IP23 weather resistant enclosure to protect internal circuits in dusty or humid environments.
  • Spacious Terminal Box: Designed with an oversized junction box that makes wiring access and AVR maintenance simple.
  • Certified Manufacturing: Built under strict ISO 9001 quality standards to ensure a clean, dependable wave profile that handles complex industrial loads without issue.

PRODUCT SPECIFICATIONS

Weight 138 kg
Dimensions 60 × 52 × 60 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

22.5kVA

Alternator Standby Power

24.8kVA

Rated Frequency

50Hz

Voltage

400V

Voltage Regulation

+/- 1%

Voltage Regulation Change (% UN)

+/- 1%

Phase Change Rate (%)

+/- 1%

Power Factor

0.8

Insulation Class

H

Alternator Type

IM B35

Connection and Pole

4 Pole, Series Star

AVR Model

SX460

Stator

2/3 Pitch

Rotor

Single Bearing

Flywheel Housing (SAE)

#4 / 7.5"

Category:
A partner in power generation

World-Class Manufacturing, Fast Regional Distribution

We source and manufacture high-quality generators, engines, and parts directly from leading global factories, including SDEC. By dealing with us directly, you cut out the middlemen, saving you time and money.

Every engine, alternator, and spare part we supply is built to international standards and fully tested to handle South African conditions. Whether you are a local generator builder looking for loose components or a business needing a complete commercial power setup, we ensure fast delivery, guaranteed stock availability, and dependable performance.

SDEC FACTORY | ROBOTIC ENGINE MANUFACTURING ASSEMBLY LINE

Our Delivery Channels

Sub-Saharan Logistics

We ship SDEC engines, diesel generators, alternators and parts throughout South Africa and across the continent, including Namibia, Botswana, Malawi, Mozambique, Zambia, Zimbabwe, Swaziland, and Lesotho.

Our team handles the entire logistics process, from factory  loading to cross-border transport, ensuring your equipment arrives safely and on time.

We hold a large volume of stock and genuine replacement parts at our warehouses so we can supply clients across Africa quickly and efficiently.

FREQUENTLY ASKED QUESTIONS

Does the price include installation?

No, installation is not included in the price. Any qualified electrician can install the kit and provide a Certificate of Compliance (COC) for the installation as per legislation.

Do you offer installation?

No, we do not offer any installation services, but, any qualified electrician can install our products.

Does the price include delivery?

Delivery is not included in any of the prices. However, delivery will be calculated in your cart at checkout based on your location and product selection.

Tell me about the Warranty

Our product warranty is detailed on each product page and as per our standard terms along with a valid COC. It is a limited warranty.

Price validity

All pricing is valid while stocks last as reflected on your quotation, as specified therein.Â