Fair grids "only" secure a basic power supply for everyone. Due to the wide frequency band from 51 to 49 Hz it hardly needs load buffer; and the possibility of dropping additional load at under frequency reduces generation capacity. Thus, Fair Grids are less expensive than conventional power grids. As a result, they are predestined for developing and emerging countries as well as for grids with fluctuating renewable energies.
In addition FairGrid require less storage than conventional power grids:
Normally, the frequency-forming power generator in the FairGrid is adjusted to just below 51 Hz. If the load suddenly rises or the feed-in power from solar or wind power plants drops, the frequency will initially drop a little, the motor load will decrease, and thus the balance between power generation and consumption will be adjusted. In the frequency range between 51 Hz and 49 Hz there is 4% free and quickly available load buffer, which does not have to be compensated in the short term. As a result, FairGrid requires less short-term load buffer.