16/06/2022
6 Facts about the Boeing 787 Dreamliner Electrical Systems
1. The 787 aircraft is designed with 2 primary rechargeable batteries, one is the main battery and the other is the APU battery. The main battery supply power for ground operations and backup power supply.
2. The 787 batteries are made of lithium-ion, with 8 cells each producing 32V/150A direct current. Each battery can weigh up to 28.6kgs.
3. The 787 is built with 6 electrical generators to produce more electricity for the aircraft operations. It has 2 generators on each engine and 2 other generators on the APU.
4. On the ground, the 787 can be started without any ground power unit, the APU battery starts the APU generators, which start the APU to power the engine generators which then start the engines.
5. During flight, the 4 engine generators are the primary sources of electrical power, powering systems such as hydraulics, wing ice protection, flight deck displays, flight controls, in-flight entertainment and more systems.
6. The Boeing 787 Dreamliner is capable of flying for 330 minutes on one engine and one generator and land safely.