Nilfisk-Advance CS7000 Fuel Cell EcoFlex, Service Manual

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Electrical System 102 Service Manual – CS7000
“Hybrid” models use a large, engine-driven 42 volt generator for their main power source with a smaller 36
volt battery pack connected in “parallel” with the generator, as a “back up”.
When the engine is running the 42 volt generator provides the electrical power to operate the 36v machine
electrical loads as well as recharge the 36v battery pack. If the machine demands more current than the 42
volt generator can provide, the 36 volt battery pack supplies the extra boost that is needed. If the engine is
not running the machine can work for a limited time on just the 36 volt battery pack The main machine uses
a 36v supply to operate some 36v electrical loads.
Hybrid models also have a separate 12 volt starting battery.
The main purpose of the staring battery is to start the engine. The engine drives a separate 12 volt generator
(Alternator) to recharge the starting battery and supply power for 12v engine electrical loads. The main
machine controller is supplied a 12v power source which it uses to control some 12v engine electrical devices.
12v Power Distribution - Engine models only
Hybrid Power Supply
36V Battery Pack
42V Alternator
Main Machine
Controller
36V “Machine” Electrical
Loads
12V Starting Battery
Main Machine
Controller
Engine Electrical Loads
12V Alternator