Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_11456251_5 ( number_of_generators VARCHAR, power_capacity__gw_ VARCHAR )

### Question ###
What is the number of generators where the power capicity is 78.7?

### Accurate SQL ###

SELECT COUNT(number_of_generators) FROM table_11456251_5 WHERE power_capacity__gw_ = "78.7"