Single Phase Hybrid Inverter G98 G99 Certified

G98 and G99 are the UK engineering recommendations that set how small-scale generation connects to the distribution network. An inverter sold into the UK market must hold the relevant certification and be set to the correct grid code before the installation can be notified to the distribution network operator. This page covers the certified single phase hybrid inverter range supplied by Sinoah Energy and the documents that come with each unit.

The range is manufactured by NeoVolt and supplied from UK stock. Certification covers the grid codes used across the UK and several European networks, so the same hardware can be configured for a domestic installation in England or a project with a different network requirement without changing the model.

G98 and G99: What the Standards Cover

G98 applies to generating units of up to 16A per phase. For a single-phase domestic installation at 230V this equates to roughly 3.68kW, so the smaller hybrid inverters and most single-phase home systems are connected under G98. The standard sets protection settings, power quality limits and the loss-of-mains response that the inverter must follow.

G99 covers generation above the 16A per phase threshold, and it also applies where the aggregate output of several units on one supply exceeds the G98 limit. Larger single-phase hybrid inverters, and installations with battery storage that can export, are commonly notified under G99. Both routes require the installer to submit the unit details and the certification references to the network operator.

Certified Models in the Range

Grid and Safety Certificates Held

What Is Included for the DNO Application

Each unit is supplied with the certificate set for the grid codes it carries, together with the commissioning record that shows which grid code was selected on site. Installers use these documents to complete the G98 or G99 notification with the network operator, and to close out the electrical certificate for the installation.

Where a job needs a specific grid code, it is selected during commissioning from the certified list and can be changed later if the network requirements change. The monitoring platform keeps the recorded setting with the unit history, which is useful at handover and for any future inspection.

Applications

Single-phase domestic solar and battery installations across the UK, notified under G98 where output stays within 16A per phase.

Larger homes and small commercial sites notified under G99, including installations with battery storage that can export to the network.

Trade and distribution orders where a variety of certified models are needed from one supplier and one warehouse.

Why Choose Sinoah Energy

Sinoah Energy is a UK-based supplier of LiFePO4 batteries and hybrid inverters, holding stock in the UK so installers receive units with the current certificate set for UK connection. The company supports pre-sales system design, capacity calculation and grid code selection, and handles warranty service locally.

For trade customers the service includes compatibility checks between inverter and battery, OEM or ODM customisation, dealer pricing on monthly supply, and installation and product training.

FAQ

Q: Does a G98 certified inverter need to report every installation?

A: Yes. The installer notifies the network operator using the unit details and certification references supplied with the inverter.

Q: When is G99 needed instead of G98?

A: G99 applies above 16A per phase, and to installations where the combined generation on the supply exceeds the G98 threshold.

Q: Are the certificates provided with the unit?

A: Yes. The certificate set for each grid code held by the model is supplied with the unit and with the commissioning record.

Q: Can the grid code be changed after installation?

A: Yes, it is a setting selected during commissioning from the certified list and can be changed if the network requirement changes.

Q: Which models are held in UK stock?

A: The single-phase hybrid inverter range from 3.6kW to 12kW is held in the UK warehouse for dispatch to installers, dealers and trade partners.

Q: Is battery storage covered by the same certification?

A: The battery modules carry their own safety and transport certification, including IEC 62619 and UN38.3, which is provided alongside the inverter documents.