Solar Transformer Product & Price Catalog: Your Guide to Detailed Quotes and Inventory | CHBEB

Introduction

If you don’t have a clear catalog, you can end up with the wrong solar transformers¹, which could cause delays and cost you money. When your inverters or grid don’t match up with kVA and voltage, things get even more confusing. Use this guide to look up specs, check what’s in stock, and get quick, accurate prices.

Find Your Solar Transformer: Browse by KVA and Voltage

Guessing leads to things being too big, losing money, and needing to make changes. As deadlines slide, stakeholders get angry. You may quickly narrow down your choices to the proper three-phase or single-phase devices by starting with a basic matrix of kVA and voltage.

Transformers for Three-Phase Solar

Three-phase pad-mounted or station-type devices may manage utility-scale PV blocks, wind turbines, and C&I microgrids where balanced loads, motor/VFD compatibility, and power quality control are required.

kVA/MVA Class	Typical Primary (MV)	Typical Secondary	Common Vector Group2	Use Case	Typical Availability
150–500 kVA	11 / 13.8 / 22 kV	480/277 V or 400/230 V	Dyn11 / YNd11	C&I rooftop PV blocks, microgrids	Standard builds; select quick-ship SKUs
750–2000 kVA	22 / 24.9 / 33 kV	690 V, 480/277 V, or 400/230 V	Dyn11 (triplen blocking)	Utility-scale string inverter skids	Made-to-order with stocked components
2.5–5 MVA	33 / 34.5 / 35 kV	690 V or 800–1000 V class	Ynd or Dyn per grid code	Central inverter stations, collection	Project builds; scheduled production slots

• Recommended choices include dead-front terminations, MV surge arresters, off-circuit taps (±2×2.5%), copper windings for high duty, and natural ester fluid for fire safety.
• Design notes: Set %Z to balance fault duty and regulation, and check with the utility to make sure the neutral and ground are correct.

Single-Phase Solar Transformers

Single-phase pad-mounted units can handle low to moderate loads, agricultural PV, and residential areas where keeping things simple, taking up less space, and keeping costs down are important.

kVA Class	Typical Primary (MV)	Typical Secondary	Configuration	Use Case	Typical Availability
25–100 kVA	7.2 / 12.47 / 13.2 kV	240/120 V or 480/240 V	Single-phase, split-phase	Small PV tie-ins, farms	Common stock on standard voltages
167–500 kVA	12.47 / 24.9 kV	480/240 V or 240/120 V	Single-phase	Community solar, light C&I	Build-to-order with quick components

• When to choose: loads that are stable and predictable, three-phase equipment that is limited, and strict siting restrictions.
• Things to think about: Make plans for more EVs and HVAC systems; think about switching to three-phase feeders if the number of customers goes up.

Get a Detailed Quote & Check Inventory

Vague RFQs lead to delays, change orders, and bad prices. Teams spend weeks going over specs. To get quick, apples-to-apples quotations, use a structured request that answers engineering and procurement questions right away.

A Simple Step-by-Step Guide to the Quote Process

1. Share load data: peak/diversified kVA, duty cycle, ramp behavior, harmonics limitations, and growth prediction.
2. Define voltages: MV primary (like 11/22/33/35 kV) and LV secondary (like 690 V, 480/277 V, or 400/230 V).
3. Choose the type of configuration: three-phase or single-phase; vector group (Dyn, YNd); grounding method; and %Z target.
4. Set taps and protection: Tap range (for example, ±2×2.5%); bayonet/CL fusing; surge arresters; and fault indications.
5. Environment: ambient/altitude, corrosion category (C4/C5-M), noise limits, animal guards, and ingress protection.
6. Copper vs. aluminum windings; ONAN/ONAF; mineral vs. natural ester fluid; dry-type if liquid is limited.
7. Compliance and tests: IEC/IEEE³ rules that apply; routine, type, and special tests; and documentation that needs to be delivered.
8. Logistics: The date the ship must leave, the constraints on the pad/loading, how to get to the delivery, the warranty, and the spare parts kit.

Tip: To evaluate offers on total cost instead than sticker price, change guaranteed loss numbers (no-load/load) into annual energy cost.

The current state of the inventory

When it’s not obvious when something will be available, buying timeframes become pushed back. Surprises cause expensive rework. We break up the inventory so you can plan your scope and timeline early.

• In-stock SKUs: Popular kVA/voltage combinations that can be shipped quickly; great for quick replacements.
• Quick-build: Standard designs put together from supplied cores, coils, and cabinets; predictable shipping windows in the near future.
• Build-to-order: Fully personalized ratings, taps, and accessories are set to be made; this is best for engineered projects.

To double-check the exact amounts, lead times, and appropriate accessories (elbows, arresters, connections), ask for the most recent pick-list.

Custom Solar Transformers & Expert Support

Off-the-shelf units don’t always work in real life. Making a near-match more expensive in the long run. Set bespoke choices and rely on expert advice to keep performance, safety, and schedule on track.

Need a solution just for you?

Customize the transformer to fit your grid code, environment, and maintenance plan. The appropriate choices can pay for themselves by lowering losses, fewer outages, and a smoother commissioning process.

• Electrical: K-factor/thermal allowance for harmonics, tap range, vector group, %Z selection, and the procedure for neutral and grounding.
• Thermal and fluids: ONAN/ONAF stages, temperature-rise class, mineral or natural ester fluids, and dry-type fluids where liquids are not allowed.
• Low-noise cores and clamps, marine-grade coatings, sealed bushings, animal barriers, and compact pads are all examples of enclosure and siting.
• Monitoring: winding RTDs, oil level/temperature, and moisture indicators; optional digital gateways for predictive maintenance.
• Serviceability: standardized bushings and elbows, easy access to taps, spare parts kits, and test locations that are easy to find.

Get in touch with a Solar Transformer Expert

Projects can become stuck because of complicated standards and regulations about how things link. Misunderstanding leads to expensive redesigns. Before you send out the PO, a quick engineering review lowers the risk of selection, speeds up approvals, and makes sure your inventory matches your timeline.

• Free spec check against standards set by utilities and studies on protection.
• Side-by-side loss monetization for a real TCO comparison.
• Inventory match: generate a list of in-stock or quick-build options that fit your schedule.
• A commissioning playbook and spare parts suggestions to have things ready for day one.

Conclusion

To avoid delays and costly mistakes, make transformer selection simple and structured:

1. Start with kVA and voltage: Make sure the transformer rating matches your inverter output and grid requirements.
2. Request structured quotes: Ask suppliers to include not only price, but also losses, warranty, delivery time, and compliance with standards.
3. Plan availability early: Know what is in stock, what can be quick-built, and what requires custom production to match your schedule.
4. Use expert support when needed: Engineers can review vector groups, impedance, or cooling options to ensure safety and compliance.

In short: This approach ensures the solar transformer you purchase is correctly sized, reliable in operation, and delivers the lowest total cost over its lifetime.

1. Solar inverter — Wikipedia ↩︎
2. Transformer Vector Groups — All About Circuits ↩︎
3. IEEE Transformer Standards — IEEE ↩︎

Learn More About Our Transformers

Want to explore more transformer solutions? Download our latest product catalog or browse our product categories to find the right fit for your project.

📥 Download Product Catalog 🔎 Browse Product Categories