825kVA Three Phase Alternator STRO-825K

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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 825kVA Three Phase Alternator (STRO-825K) supplies high capacity power for diesel generator sets, localised micro grids and heavy industrial plant infrastructure. Manufactured in a strict ISO 9001 quality assurance environment, this 4 pole brushless unit handles major electrical starting loads without letting line voltage drop.

  • High capacity output: It delivers a continuous 750kVA prime power rating and scales up to 825kVA standby output at a stable 50Hz frequency with a 0.8 power factor.
  • KR440 voltage regulation: The premium factory fitted automatic voltage regulator keeps line output within a tight 1% margin to protect equipment from sudden voltage sag or spikes.
  • Low distortion windings: Features a 2/3 pitch stator winding layout that keeps total harmonic distortion low.
  • Industrial grade protection: The single bearing configuration is optimised for standard SAE housing flanges and has Class H insulation and an IP23 weather protective 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 825kVA Alternator

The StromerPower STRO-825K is built for large backup power systems, heavy manufacturing plants and major commercial hubs. This 825kVA three phase alternator is manufactured under a strict ISO 9001 quality system. Operating at a standard 1500rpm, the 4 pole brushless unit gives you the heavy industrial power needed to power large diesel generators, fabrication workloads or other industrial applications.

StromerPower 825kVA (STRO-825K) Alternator Features

  • Power output: Delivers 750kVA prime power output for continuous running and handles up to 825kVA standby capacity during emergency grid failures (50Hz at 0.8 power factor).
  • KR440 voltage regulation: A factory installed automatic voltage regulator locks the line output within a tight 1% margin. This stops sudden voltage sags from reaching and damaging equipment.
  • Winding geometry: Built with a 2/3 pitch stator layout that keeps total harmonic distortion low.
  • Vibration and balance: The internal components are dynamically balanced to limit running resonance and protect the bearings.
  • Frame construction: A strong structural steel frame paired with an IP23 weather shell and Class H thermal insulation.
  • Technician access: The terminal box is allows service teams room for quick cable connections, phase balancing and regular maintenance.

PRODUCT SPECIFICATIONS

Weight 1542 kg
Dimensions 139 × 84 × 113.5 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

750kVA

Alternator Standby Power

825kVA

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, Star

AVR Model

KR440

Stator

2/3 Pitch

Rotor

Single Bearing

Flywheel Housing (SAE)

#1 / 14"

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