G99 for self install?

[Skipper]

I think I have settled on a Solis 8kW hybrid inverter, S6-EH1P8K-L-PLUS ( SOLIS/12789/V1/A1 ) as the ideal solution for my array/battery setup. It is fully G99/G100 type tested.

I'm not that fussed about export and probably won't sign up for SEG payments so export is a low priority, but I wouldn't say no to free money I guess. Is it a question of chucking a G99 form in with the full 8kW output and seeing what they come back with? Is there a charge for just chucking in a speculative G99?

I understand they sometimes come back with a charge for network upgrade for G99 applications, can you reduce/eliminate that by implementing a G100 ELS with a lower value or even zero export value? I know from the grid capacity database that my local substation is showing plenty of headroom for reverse power capability, but the upstream isn't so not quite sure how that will pan out. There is some mention of witness testing, possibly for G99 applications over 32A ... but possibly not for fully type tested equipment. At the best part foa a grand, that is something I'd rather avoid.

The alternative would simply be to use an AC charger / off-grid setup where the connected device is not capable of generation and just avoid the entire G99 thing, but the particualr inverter above would be a neat single-box solution ...

 

[binky]

G99 is for export limited larger arrays. You need to make an application for such an array to the DNO prior to installation. So do that and see what they say. NB it's not the size of the array they are interested in, it's the inverter. I used to regularly ask if the network would take more than 16A back feed, most of the DNO staff were very helpful, except one, who was a right jobsworth and would continually state 16A max.

If you are limited to 16A, they can't stop installation, and any network issues are not chargeable to you.

 

[Skipper]

Yep, I was aware its was on an approve and install basis, not the fit and notify basis of G98 for anything over 16A.

Yep, aware it is based on inverter output size, and being 34.8A it pushes it out of the SGI fast-track route and into form A1-2 ... I would have gone for the S6-EH1P6K which can go down the fast track route, but it only has 2 mppt/strings whereas my array is more suited to a 4 string solution.

Rightio then, I shall submit and see what happens!