Diesel generators require batteries to start them periodically. The size of the battery depends on the size of the diesel generator. Example:
A 350 kW generator has one 4D battery while a 1500 kW and 2MW units have two 8Ds or four 4Ds depending on the generator battery enclosure
• 4D and 8D batteries are mostly used for larger generator applications (500 kW and above).
The high quality 8D manufactured by Deka part number 908D is the same as the Caterpillar battery