Works out whether solar and batteries can be connected first and notified under G98, or need the network operator's approval under G99.
Most of the form is filled in already with figures that give a sensible answer. Adjust what you know and press the button.
Work out which ENA connection procedure a domestic installation of solar panels, batteries or both falls under: connect first and notify the distribution network operator within 28 days, or apply and wait for approval before anything is connected.
The rules are the ENA's engineering recommendations, not MCS documents: EREC G98 for small installations, EREC G99 for everything larger, and EREC G100 for export limitation. Every test is in amps per phase at a nominal 230 V, and it applies to the premises as a whole, so list EVERY inverter that can export, existing ones included. A battery counts as generation even if it only ever charges from the panels.
The figure that counts is each inverter's registered capacity: its AC rating, or a lower limit the manufacturer has fixed. It is NOT the panels' kWp. A 4.4 kWp array on a 3.68 kW inverter is a 3.68 kW installation. Where an inverter has been capped below its hardware rating, give the hardware rating as 'designCapacityKw', because G99 tests that separately.
The routes are: G98 when the total is 16 A per phase or less (3.68 kW single phase, 11.04 kW three phase); G99 SGI-1, also connect and notify, when the total is within 16 A but an inverter built for up to 32 A has been capped; G99 SGI-2 and SGI-3, fast track applications answered within 10 working days, which allow larger totals held back by a type-tested export limiter; and the standard G99 application for anything else. An export limiter NEVER brings an installation under G98.
IMPORTANT: this says which procedure applies, not what the operator will decide. Approval depends on the local network, which only the operator can assess. Say so whenever you report a result.
The same calculation answers on
POST /api/v1/calculators/connection-route
and as the MCP tool connection_route.
How to call them.
Anything that generates or stores electricity has to be notified to the local network operator, and above a certain size has to be approved before it is connected. The difference is worth knowing before signing.