this should be easily solved by having a grid fee separate from the energy fee
As of now the official rate "tarif bleu" available to all consumers are 151.2 EUR per year (12.6 EUR/month) for grid free of a 6kVA feed and 0.2516 EUR/kWh.
Average electricity consumption of a household in France is 5681 kWh/year.
For homeowner with solar when you export to the grid the excess you are paid (currently) 0.1301 EUR/kWh so less than the consumer price per kWh. There is also a small annual fixed fee for grid injection (24.36 EUR/year currently).
Crediting generation, and zeroing/discounting the transmission fee would be "more fair" but it would wreck the incentives.
Same here, on the Peninsula of the Bay Area: Generation comes from generation owned or contracted by SVCE [0], which is then delivered via PG&E (both transmission and distribution).
Billing is handled by PG&E: My bill has a section for PG&E charges, and a section for SVCE charges. The PG&E section has a generation credit, that effectively removes any costs of non-SVCE power generation, leaving the costs of transmission & distribution.
Things have changed with the new legal mandate fixed fees that are being rolled out.