Products

Built for every electrolyser chemistry. Engineered for your project.

Yonder's Power Core delivers precision DC output matched exactly to your electrolyser's sensitivity envelope, whether you're running Alkaline, PEM, AEM, or SOEC.

Grid to electrolyser: the converter chain

Grid interface

Transformer

Grid interface and isolation. Oil or dry (VPI) types up to 25 MVA and 33 kV, with 2–27 windings and custom vector groups.

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Baseload

Thyristor Converter

Proven robustness for high-current, stable baseload applications. Highly serviceable, cost-effective for predictable power demand profiles.

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Most specified

IGBT Converter

Most specified for modern MW-scale projects. High power factor, exceptionally low harmonic distortion, rapid response to grid variability.

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EU / AEM

SiC Converter

Next-generation switching efficiency in an ultra-compact footprint. Deployed on cutting-edge AEM platforms in Europe.

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Transformer range

Converter duty

Converter Duty Transformer

Oil filled transformer built for rectifier feed, with harmonic-aware winding arrangements.

Rating: Up to 25 MVA
Voltage: Up to 33 kV
Pulse: 6 / 12 / 24
Cooling: ONAN / ONAF
Winding: Aluminium or copper
Tapping: Off-circuit or OLTC
Standards: IS 2026, IEC 60076, IEC 61378
Supply: 3 phase, 50/60 Hz

Distribution & power

Distribution & Power Transformer

Oil filled transformers for plant supply and converter feed across the full kVA to MVA span.

Rating: 630 kVA to 25 MVA
Voltage: Up to 33 kV
Cooling: ONAN / ONAF
Winding: Aluminium or copper
Fluid: Mineral, silicone or ester
Sealing: Conservator or hermetically sealed

Cast resin

Cast Resin Transformer (CRT)

Dry type cast resin unit for indoor and space-constrained sites, in two variants.

Rating: Up to 5 MVA
Voltage: Up to 33 kV
Cooling: AN / AF
Insulation: Class F / H
Protection: IP00 to IP44
Variants: Distribution or converter duty
Pulse: 6 / 12 / 24

VPI

VPI Transformer

Dry type vacuum pressure impregnated unit for compact indoor and outdoor installations.

Rating: Up to 2.5 MVA
Voltage: Up to 6.6 kV
Cooling: AN / AF
Insulation: Class F / H
Phase: 1 or 3 phase
Protection: IP00 indoor, IP54 outdoor

IGBT vs Thyristor

Why IGBT? The Case for Active Front End Power Conversion

Our AFE+Chopper IGBT architecture delivers measurable advantages over traditional thyristor-based converters, especially for modern MW-scale hydrogen plants connected to variable grids.

Power Factor: >0.99 with active control, no passive filter needed
Thyristor · ~0.95, passive filter required
THDi (Grid Current): <2.5%, PWM controlled
Thyristor · 5–12%, needs a 24-pulse transformer to get below 3%
Harmonic Control: Fully active and adaptive, can compensate grid harmonics
Thyristor · Fixed, depends on transformer configuration
DC Bus Response: Fast, ~500 Hz bandwidth
Thyristor · Slow, ~100 Hz firing angle control
Efficiency at Part Load (40%): Higher, more efficient at partial loads
Thyristor · Lower at part load
Transformer Cost: ~40% lower, uses a single-winding distribution transformer
Thyristor · Requires a multi-winding transformer
Grid Compatibility: Excellent, IEEE 519 compliant out of the box
Thyristor · Needs additional filtering for IEEE 519
System Cost: Comparable overall, with more flexibility and simpler maintenance
Thyristor · Lower component cost but higher transformer and filter costs

IGBTRecommended

Thyristor converters remain a proven, robust choice for stable baseload applications. Yonder offers both architectures and recommends the right fit for your project's grid profile and operational requirements.