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House and chassis battery charging on a Mercedes chassis
I'll get this right someday. The chassis alternator can charge the house battery, but the chassis battery cannot be charged by the house unless the BIM is installed. Attached is a battery diagram for the Mercedes chassis. Ref attached diagram.
The isolator solenoid is activated by the chassis battery. When this solenoid detects a charge coming FROM the chassis alternator, it will be activated and allow for the house batteries to charge, (with the house disconnect switch engaged of course). The house cannot charge the chassis through this solenoid. That would require a Bi-Directional Relay/BIM, which under the current agreement between Thor Motor Coach and Mercedes, is not allowed to be installed by TMC.
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