FAQ

OWON devices support ZigBee 3.0, Wi-Fi (2.4 GHz), Modbus RTU/TCP, MQTT, and TCP/IP. Protocol support varies by model — check individual product pages for details.

Accuracy is quoted per model in the product specifications rather than as a blanket class: typically voltage ±1%, and current ±1% at rated current with ±2% at low current, banded per CT rating. The published bands are measured values, which are better than the general rule of 1% above 5% of the CT range.

Yes — OWON ZigBee 3.0 devices are interoperable with standard ZigBee 3.0 coordinators. We also provide our own OWON gateway for turnkey deployments.

OWON products carry a 1-year standard warranty. Terms for a specific order — the start date, whether a fault is repaired or replaced, and who covers return freight — are confirmed with your sales contact.

Yes — smart meters connect to mains wiring and must be installed by a certified electrician. DIN rail mounting is standard; detailed wiring diagrams are included in the product manual.

Put the gateway in pairing mode via the web interface or mobile app, then power on the device. Most devices auto-join within 30 seconds. Refer to the Quick Start Guide in the box.

OWON WiFi devices operate on 2.4 GHz (802.11 b/g/n). 5 GHz is not supported to maintain better range and wall penetration.

Typical indoor range is 30–50 meters (line of sight up to 100m). ZigBee mesh networking extends range — each mains-powered device acts as a repeater.

Yes — OWON provides MQTT and REST APIs for third-party integration. Full documentation is available in the Developers section, including code examples and SDKs.

Yes. Wi-Fi and MQTT models integrate with Home Assistant through MQTT auto-discovery, and ZigBee models work with standard ZigBee 3.0 coordinators including ZHA. Zigbee2MQTT support depends on the model, so confirm the specific model before building on it.

Use the MQTT API to subscribe to device telemetry topics. Data is published in JSON format at configurable intervals. See /developers/mqtt for topic structure and examples.

Yes — selected meter models have RS-485 Modbus RTU interfaces. Modbus register maps are available in the product datasheets.

OWON sells B2B through distributors and direct sales. Use the Get Base Price button on any product page, or contact our sales team for volume pricing and lead times.

100 pcs per model for standard orders. Sample and pilot quantities are available — tell us your project and we will find a workable start.

Yes. Standard units ship neutral with no brand, and we can print your brand on the product, use your packaging and manual, and do appearance or function customisation for project volumes. OEM MOQ is 100 pcs per model.

CE (RED reports EN 300 328 and EN 301 489, EN 62479, plus LVD EN IEC 62368-1) and RoHS on request; FCC for selected models. We do not hold SASO/SABER, BIS, WPC/ETA, SIRIM, INMETRO or Anatel — for those markets the registration is normally handled by the importer, and we support with test reports and technical files.

Yes. Samples normally dispatch within 3 working days after payment. Production orders are quoted with a lead time, typically 45–60 days.

Four things: the model, the CT rating where applicable, the quantity, and the delivery country — plus a postcode for the freight figure. We then send the formal quotation.

PayPal for samples and small amounts, and bank transfer (T/T) for larger orders. Prices are FOB Zhangzhou.

No — we work FOB Zhangzhou and quote freight separately by courier. Import duties and taxes are on the buyer side.

You choose. The Tuya versions use the Tuya platform; the open versions report to your own broker or server, so the data stays in your infrastructure — often the preferred option for European customers.

We work B2B with distributors, integrators and brand owners. We do not sell through retail or e-commerce channels.

Yes — 50 / 60 Hz.

Yes. We provide the HS code with the shipping documents and declare the full value. For Brazil we additionally need the buyer CPF/CNPJ and CEP; for Saudi Arabia the importer normally needs SASO/SABER clearance.

For project orders, yes — the broker address and per-device credentials can be configured before dispatch.

Yes — protocol documents are provided for project customers, under NDA where a document is not public. Tell us the model and your integration route and we will send the matching set.

Email or WhatsApp. We reply to enquiries within one working day, and written communication is the most efficient route for us.

Check (1) power supply, (2) gateway online status, (3) ZigBee/WiFi signal strength, (4) network firewall settings. Most offline issues are resolved by power-cycling the device and gateway.

Compare against a calibrated reference meter. Ensure CT clamps (if applicable) are correctly oriented and fully closed. Contact support if deviation exceeds the rated accuracy class.

Do not power off the device during update. If the update fails, the device enters safe mode — retry the OTA update from the gateway. Contact support if the issue persists.