Will I need to pay a fee to connect to the grid?

The G-99 grid connection could come with a fee.

There could be a fee to connect to the grid a “G99, grid connection fee”. However this varies by DNO and type of installation and is not predictable in advance. Where fees have had to be paid they have been around 3.5% of the total installation cost. Otovo will manage the payment and process with the DNO and will directly apply the cost to customer on final invoice if the grid charges this.