I am quite new at this so bear with my questions. I have purchased two 12 volt batteries which I will connect in series for 24 volt and to be used as house batteries. I drive a truck which has a 24 volt system. The truck's electrical system is grounded to the chassis on the negative terminal.
If I ground my house batteries to the chassis on the negative terminal, does it have any effect on the vehicle's electrical system? The starter on my car is 4 kW so I prefer to keep the systems isolated. I don't understand if grounding to the chassis can cause the house batteries to be pulled on when cranking.
The second question is, if I have grounded the house batteries to the chassis, can I drag one cable from the positive terminal on the house battery to a different location in the truck, and for negative simply use the chassis at that location?