Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many volts has an energy-to-weight ratio of 54 kj/kg to 2.0v?

### Inputs:
table_name: table, columns: ['Capacity', 'Volts', 'Temp.', 'Energy-to-weight ratio', 'Power-to-weight ratio']

### Response:
SELECT Volts FROM table WHERE Energy-to-weight ratio = 54 kj/kg to 2.0v