Lets do it right and register our solar installtion.

[GCE]

I was under the impression you only need a permit for 1 MW and above?
or is this for commercial only...

There was the need to obtain NERSA approval above 1MW that has now changed to 100MW

There is still and has always been a requirement that all PV installations be registered with the Local Supply Authority - The local Supply Authority has to keep NERSA informed has to the amount of PV connected within their area .

It has to do with security of supply , harmonics on the system and the fact that if there is too much PV being placed on the grid it causes the Voltage to fluctuate outside of what is deemed acceptable.

There is also a requirement that if you exceed 350KVA PV system that a grid compliance assessment may have to be done .

There is and has always been a restriction of 25% of main incoming C/Breaker size

NERSA published a document to assist in simplified grid connections below 350KVA but still allowed the Utility to have the final say depending on the amount of PV connected in an area or on a transformer.


NRS 097-2-1:2017
GRID INTERCONNECTION OF EMBEDDED GENERATION
Part 2: Small-Scale embedded generation

The Grid Code defines the minimum requirements for any renewable power plant (embedded generator system) in order to connect to the grid or network. Wherever conflict exists between this set of documents and the applicable Grid Code(s) in terms of more strict requirements, the applicable Grid Code(s) will take preference.
NOTE 1 The 1000 kVA value will be revisited and reviewed as the industry evolves.
NOTE 2 This document provides a standard set of specifications for small embedded generators. Compliance with this document does not guarantee that a utility will or can allow connection to the utility network.
NOTE 3 The customer is advised to contact the utility to discuss potential further connection requirements.

4.1.1.6 The maximum size of the embedded generator is limited by the rating of the supply point on the premises.

4.1.1.7 The utility will approve the size of the embedded generator and will decide on the connection point and conditions. In some cases it may be required to create a separate supply point.
4.1.1.8 Embedded generators larger than 13,8 kVA shall be of the balanced three-phase type unless only a single-phase network supply is available, in which case NRS 097-2-3 recommendations can be applied based on the NMD.


4.1.2 Simplified connection of generator sizes should be limited to 350 kVA.