--- title: "Solar Inverter-Duty Transformer | Entogo" description: "Entogo supplies inverter-duty transformers for PV and battery-storage interconnection. Match the inverter/PCS voltage, winding arrangement, grounding,…" url: https://entogo.ca/products/solar-inverter-duty-transformer/ lang: en type: website image: https://entogo.ca/_astro/solar-inverter-duty-transformer.CmSgUtIf.webp alternates: en: https://entogo.ca/products/solar-inverter-duty-transformer/ fr-CA: https://entogo.ca/fr/products/solar-inverter-duty-transformer/ fr: https://entogo.ca/fr/products/solar-inverter-duty-transformer/ es: https://entogo.ca/es/products/solar-inverter-duty-transformer/ ar: https://entogo.ca/ar/products/solar-inverter-duty-transformer/ pl: https://entogo.ca/pl/products/solar-inverter-duty-transformer/ ro: https://entogo.ca/ro/products/solar-inverter-duty-transformer/ ru-KZ: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-UZ: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-KG: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-TJ: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-TM: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-AZ: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-AM: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ ru-GE: https://entogo.ca/ru/products/solar-inverter-duty-transformer/ site: https://entogo.ca/ llms: https://entogo.ca/llms.txt --- Products › Power Transformers › Solar Inverter-Duty Transformer Power Transformers # Solar Inverter-Duty Transformer ![Solar Inverter-Duty Transformer](https://entogo.ca/_astro/solar-inverter-duty-transformer.CmSgUtIf_1aiy1j.webp) Representative configuration. The offered model, dimensions and interfaces are confirmed with the technical proposal. Overview Entogo supplies inverter-duty transformers for PV and battery-storage interconnection. Match the inverter/PCS voltage, winding arrangement, grounding, harmonics and thermal duty to the collector network and connection study. Entogo supplies this project equipment through manufacturing partners. Entogo Inc. in Toronto coordinates technical selection, supply scope and order support. | Specification | Value | | --- | --- | | Equipment scope | Transformer alone; switchgear/skid integration quoted separately | | Power rating | MVA based on inverter/PCS apparent power and required reactive duty | | Voltage ratio | Inverter-side AC voltage to collector-network voltage | | Winding arrangement | Number of LV windings, vector group and phase displacement as required | | Waveform duty | Harmonic spectrum, switching effects and any DC component reviewed | | Grounding | Neutral availability and zero-sequence path coordinated with protection | | Thermal envelope | PV cycle or bidirectional storage duty, ambient and cooling | | Design reference | IEEE C57.159 for applicable PV duty; agreed IEC/utility basis otherwise | Reference configurations and selection criteria are shown together. The technical offer defines the matched ratings, tests and guaranteed performance for the ordered unit. ## Match the converter and the grid interface Active power in MW alone does not establish transformer MVA. Include reactive-power requirements, converter current limits and the expected operating cycle. A PV generation profile and a storage charge/discharge profile can create different thermal duties. For multiple inverter outputs, define the required LV windings and phase displacement. Keep the transformer scope distinct from a complete skid substation containing switching, auxiliaries and structural integration. ## Applications - Solar PV plants - Battery storage interconnection - Renewable energy projects ## Selection & project requirements - **Can I select transformer MVA directly from solar plant MW?**: Not without the apparent-power and reactive-power requirements. Check inverter current, power factor/reactive duty, losses and operating conditions. The transformer rating must follow the electrical study, not a fixed universal percentage above PV MW. - **Can the same design serve battery storage?**: It needs a duty review. Storage can involve sustained charging and discharging as well as reactive operation. Confirm bidirectional duty, PCS waveform, grounding and thermal loading rather than assuming the PV operating profile applies. - **Why do the inverter’s harmonic and DC-injection data matter?**: They help assess additional heating and the transformer’s magnetic/insulation duty. Obtain the converter manufacturer’s data and operating cases; a generic “inverter-duty” label is not a substitute for interface verification. - **Does IEEE 1547 approval of an inverter approve the transformer too?**: No. Interconnection approval, inverter certification and transformer design/test requirements are distinct. Agree the utility’s connection conditions and the applicable transformer specification, with IEEE C57.159 considered where relevant to PV duty. For Canadian and US projects, include the utility specification, service frequency and required approvals. State whether the order is for the transformer alone or an integrated equipment package. ## Discuss your equipment requirements Send your single-line diagram, load or process data, target market and required schedule. We will identify the configuration and documents needed for a technical quotation. ## Design references [![Distribution substation and grid interconnection point for solar and battery energy storage](https://entogo.ca/_astro/ieee-1547-der-grid-interconnection.BmCW5JmP_14fafr.webp) Renewable Grid Connection ### Interconnecting solar and storage to the grid: what IEEE 1547-2018 requires Connecting solar or battery storage to the North American grid means meeting IEEE 1547-2018 for DER behavior, using a UL 1741 SB certified inverter, and passing a utility interconnection review that scales from a fast-track screen to a full study. Here is how the pieces fit. View](https://entogo.ca/insights/ieee-1547-der-grid-interconnection/)[![Medium-voltage substation and power distribution equipment at dusk, the grid interconnection point for a battery energy storage system](https://entogo.ca/_astro/battery-storage-interconnection-transformer-sizing.B07z-eni_VK898.webp) Energy Storage ### How to size a battery storage interconnection: inverter kVA, transformer kVA and %Z A 2 MW battery inverter holding IEEE 1547 reactive capability is a 2222 kVA source, so it needs a 2500 kVA transformer, 2673 A of conductor under NEC 705.28, and 65 kA gear once the 600 V bus fault duty reaches 44,403 A. View](https://entogo.ca/insights/battery-storage-interconnection-transformer-sizing/)[![Commercial rooftop solar array paired with a battery energy storage system, illustrating DC-coupled versus AC-coupled solar-plus-storage architecture](https://entogo.ca/_astro/dc-coupled-vs-ac-coupled-solar-storage.DDoifbrI_Z2cjtCg.webp) Solar-Storage-Charging ### DC-coupled vs. AC-coupled solar-plus-storage: how to choose DC coupling ties the battery to the array's DC bus behind one hybrid inverter and recaptures clipped energy; AC coupling gives solar and storage their own inverters and easier retrofits. The right choice depends on whether the two are built together. View](https://entogo.ca/insights/dc-coupled-vs-ac-coupled-solar-storage/) ## Related equipment [![Entogo 36 kV class three-phase oil-immersed power transformer for substations](https://entogo.ca/_astro/Entogo-35kV-Three-Phase-Oil-Immersed-Distribution-Transformer.BWoRk9EQ_Z1dAjmQ.webp) Products ### 36 kV Oil-Immersed Power Transformer A liquid-filled (mineral oil) three-phase power transformer for substation and subtransmission duty in 34.5 / 35 / 36 kV networks, rated 2.5 to 31.5 MVA with ONAN / ONAF cooling, off-circuit or on-load tap changing and copper windings, designed to IEEE C57.12.00 / C57.12.10 and IEC 60076. View](https://entogo.ca/products/oil-immersed-power-transformer-36kv/)[![Representative outline drawing of an Entogo three-phase dead-front pad-mounted transformer — front and side elevations, not a photograph](https://entogo.ca/_astro/Entogo-Three-Phase-Pad-Mounted-Transformer-Outline.BEuthAyQ_ggksH.webp) Products ### Three-Phase Pad-Mounted Distribution Transformer Three-phase pad-mounted distribution transformer for North American utility, commercial and industrial service — 75–2500 kVA, 12.47–34.5 kV class primary to 480Y/277 or 208Y/120 secondary, dead-front loop/radial-feed, NEMA 3R. Designed to IEEE C57.12.34 and DOE 10 CFR 431; UL/CSA certifiable. View](https://entogo.ca/products/three-phase-pad-mounted-transformer/)[![Scott-Connected Transformer](https://entogo.ca/_astro/scott-connected-transformer.C8DBVrLO_Zvi3Tr.webp) Products ### Scott-Connected Transformer Entogo supplies Scott-connected transformers for conversion between three-phase and two-phase circuits. Define the two output loads, 90° phase relationship, voltage ratio and operating cycle before selecting the winding design. View](https://entogo.ca/products/scott-connected-transformer/)[![Entogo 36 kV outdoor compact unit substation for renewables and industrial sites](https://entogo.ca/_astro/Entogo-35kV-Chinese-Type-Substation.Dvb2rMnE_Z1wVTEq.webp) Products ### 36 kV Outdoor Compact Unit Substation A factory-assembled outdoor unit substation — incoming 34.5 / 35 kV switchgear, liquid-filled step-up or step-down transformer (1,000–10,000 kVA) and a low-voltage section in one weather-tight enclosure — for solar PV, wind and industrial interconnection. Built to IEEE C37.121, ANSI C57.12.34 and IEC 62271-202. 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