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Established in 2000, Zhejiang Yongtailong Electronic Co., Ltd. is located in the center of Shanghai, Hangzhou and Suzhou cities. As a professional China EV Charging Electricity Meters Manufacturers and EV charging Power Meter factory, YTL designs and produces electronic energy meters which are cost-efficient and ideal for the use in solutions for AMR/AMI at residential as well as industrial applications.YTL was one of the first companies in the domestic market with which had an internal R&D department as well as international sales business. YTL is devoted to develop and design all types of wholesale EV charging Power meter, concentrators and solution applications. At present our export volume makes us a leading company for technology and product export to more than 50 countries throughout the world.
EV Charging Electricity Meter Wholesale
EV Charging Electricity Meters Manufacturers
EV Charging Energy Meters for AC and DC EVSE
An EV charging energy meter measures electrical energy at a defined point in electric vehicle supply equipment (EVSE). An AC meter is normally used at the charger input or AC branch, while a DC meter is used after AC-to-DC conversion or at another defined DC point. Selection depends on the measurement boundary, electrical range, sensing method, communication, update rate, billing purpose and destination-market requirements.
YTL provides AC and DC energy meters for EVSE manufacturers, charge point operators, EPC contractors and system integrators. Available categories include single-phase and three-phase DIN-rail meters, fast-refresh AC meters and DC meters, subject to model-specific specifications and certification.
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Smart Meter Rollout Acceptance Checklist: From Meter Box Readiness to DCU and HES Validation
2026-07-10A utility should not approve a mass smart meter rollout merely because a sample meter records kWh or because one laboratory session successfully reads data. Acceptance must cover the complete delivery...
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Feeder and Transformer Load Monitoring for Large Load Growth: What Utilities and C&I Sites Need to Measure
2026-07-09Large electrical loads are no longer only a customer-side energy-management issue. AI data centers, EV charging hubs, electrified manufacturing, battery energy storage systems (BESS), heat pumps and d...
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Smart Metering in Latin America: How AMI, Anti-Tamper Meters and Grid Data Support Loss Reduction
2026-07-07Meta Title: Smart Metering in Latin America: AMI and Loss Reduction Guide Meta Description: Learn how AMI, prepaid metering, anti-tamper meters and smart meter data can support loss reduction, revenue...
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Complete Engineering Guide to Electric Smart Meters: Architectural Comparisons, Communication Protocols, and Grid Integration Standards
2026-07-051. Architectural Evolution: Automated Meter Reading (AMR) vs. Advanced Metering Infrastructure (AMI) The transformation of electrical distribution grids relies heavily on the capabilities of modern el...
Industry Knowledge Extension
What is an EV charging energy meter?
An EV charging energy meter measures electrical energy at a defined point in electric vehicle supply equipment (EVSE). Depending on the charger architecture, it may measure the AC input, an AC branch, a DC bus or the charger output. The selected point determines which conversion losses and auxiliary loads are included.
Should an EV charger use an AC or DC energy meter?
Use an AC meter when the required measurement boundary is at the charger input or AC branch. Use a DC meter when measurement is required after AC-to-DC conversion or at a defined DC output point. The choice depends on charger architecture, billing purpose, electrical range and applicable market requirements.
Where should an energy meter be installed in an EV charger?
Installation depends on the required measurement boundary. AC input metering is placed before power conversion, while DC-side metering is installed after conversion at a defined DC point. Confirm the billing purpose, electrical architecture, safety design and applicable market requirements before selecting the installation position.
Does every EV charging project require a MID-certified meter?
No. Requirements depend on the destination market, billing model, measurement point and project specification. Verify the exact meter model, certificate number, certification scope and validity before selection. MID certification for an AC meter does not automatically establish compliance for DC charging billing.
Can a Modbus energy meter connect to any EV charger?
Not automatically. Confirm the physical interface, Modbus version, serial settings, register map, data format, byte order, update rate and charger-controller implementation. Integration should be tested using the selected meter model and the actual charger controller.
Does the energy meter communicate directly with an OCPP platform?
Usually not. The meter exposes measured values through its supported interface, and the charger controller reads and maps those values. The controller may then send relevant measurands to the charging platform through OCPP. OCPP is normally implemented by the charger controller rather than the meter itself.
Is a bidirectional meter required for every EV charger?
No. Bidirectional measurement is required only when energy may flow in both directions at the selected point, such as in a supported vehicle-to-grid or vehicle-to-building architecture. The charger, meter model, controller integration and applicable rules must all support the intended function.
Why does meter data update rate matter in EV charging?
The data update rate determines how quickly the charger controller receives new measurements. Faster updates may be useful for dynamic load monitoring and power control, but update rate is separate from metrological accuracy and billing-register behavior. Confirm the stated refresh time of the selected model.
What information is required to select an EV charging energy meter?
Provide the charger type, measurement point, AC or DC system, phase, voltage, current range, direct or sensor-based architecture, required accuracy, communication interface, update rate, target market, billing purpose and expected quantity.
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