In other words it will probably fry your controller.will be problem during the daytime charging status
In automotive- and less frequently, marine- people would be surprised how often the negative is switched.Switches can be on negative cables. I have a system disconnect switch on my battery negative.
Never mind the MGs and Saab’s? that were “positive ground.”
My batteries consist of 16 eve 280ah cells and I have 2 packs. (32 cells total) I suppose it would be best to leave the switch on “all”. I had the switch mainly using it as a shutoff.
I went ahead and wired the switch to my positive side which I realize is standard protocol.
This would most likely mean anything downstream of the positive terminal like a busbar could still accidentally be shorted to ground and why it was recommended to have switch on positive.Switches can be on negative cables. I have a system disconnect switch on my battery negative.
There is no "standard". The battery disconnect switch can be on the positive or the negative. If I disconnect the negative battery connection the positive can not short to anything except the battery terminal itself. Pointing out the systems with a BMS are all switched on the negative side.My batteries consist of 16 eve 280ah cells and I have 2 packs. (32 cells total) I suppose it would be best to leave the switch on “all”. I had the switch mainly using it as a shutoff.
I went ahead and wired the switch to my positive side which I realize is standard protocol.
See my post number 15.This would most likely mean anything downstream of the positive terminal like a busbar could still accidentally be shorted to ground and why it was recommended to have switch on positive.
This might be from way out in left field, but I've bumped into so few mentions of this while researching I thought I'd ask. Could you help me understand the reason why I should/shouldn't switch the negative, specifically the master negative on a mobile system?In automotive- and less frequently, marine- people would be surprised how often the negative is switched.
The most readily available example is ‘dome lights’ where almost all the time the lights are hardwired positive(+), straight from the fuse block, and the door switch merely closes the negative(-) for the circuit.
Many fuel injection systems in the past were all powered pos(-) and the vehicle ECM merely completed the circuit.
Never mind the MGs and Saab’s? that were “positive ground.”
Early VW were positive ground. I had a hell of a time getting a radio working with it's negative ground.@Schweg2 , what type of batteries are you using?
I had a '67 MGB GT. That Positive Earth was downright goofy.
It is not standard on battery disconnects. It depends on why the disconnect is used. To take a battery out of circuit is is common to disconnect the negative.My batteries consist of 16 eve 280ah cells and I have 2 packs. (32 cells total) I suppose it would be best to leave the switch on “all”. I had the switch mainly using it as a shutoff.
I went ahead and wired the switch to my positive side which I realize is standard protocol.
Other than removing the negative first when doing car maintenance please help me understand where it's common to use the negative to disconnect the battery. I'd like to see some examples so I can learn. Thank youTo take a battery out of circuit is is common to disconnect the negative.