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 ( power_capacity__gw_ VARCHAR, number_of_generators VARCHAR )

### Question ###
What is the power capacity when the generators were 781?

### Accurate SQL ###

SELECT power_capacity__gw_ FROM table_11456251_5 WHERE number_of_generators = 781