We are getting close to completing this project, but I have a question.
Some battery chargers green lights will illuminate when they are plugged into the battery and not plugged into the wall. And other will not. It just depends on the make and model of the battery charger whether they will do this or not.
The noise that a battery charger makes also depends on its make and model. Some models hum a little while others are completely silent.
The charging plug and port that can be threaded together can be plugged together without being threaded. The threads are there because the plug and port are common electronic connectors that are used for other purposes such as microphones which require threading them together so they do not fall apart. When these connectors are used on battery chargers threading them together is not required though. I recommend not threading them together this way if the cord is accidentally pulled it will unplug the connectors instead of pulling the wire out of the back of plug.
I'm ready to wire in my 36 volt golf cart charge meter, but it will be complicated to put it to the cold side of the on/off switch. I have another place to put it and can give it it's own switch. Can it get it's 36 volts from one of the unused connectors coming out of my controller? I have one labeled 'brake lights' and one labeled 'indicator'. Each has a black and a red wire. Can I run the black wire to one side of the charge indicator and have the red one go through a switch to the other side?
Okay thanks for the wire length confirmation. I will have our tech start building this tomorrow and then we will go ahead and send it to you.
Everything is working great and the batteries hold enough charge for several days of use and I have more than enough speed and hill climbing torque. I'm just finishing up on some graphics and then I'll post pix of the finished project. I bought a multi meter and read up on how to use it, but the only place I get a reading is across the 36 volt battery pack. Fully charged it reads 39.1. Why don't I get a reading across the terminals of the reverse relay? I have the power switch on and forward/reverse switch in forward, but no reading across the terminals of the relay.
I ran the car around my neighborhood for 45 minutes or so and then did put it on the charger. It charged up in under an hour and that made me think that it had enough juice for a few days at a fair or circus. My plan is to keep it charged up and it's easy enough to plug in the charger.
The multi meter read 38.1 volts on the relay spade connectors. If I wasn't going to connect my new indicator light and charge meter to the 'indicator' connector, would it also be OK to connect to the spade lugs on the forward side of the relay? I plan to use the indicator connector coming out of the controller box, but I want to understand as much as I can about this set up.
I 'm guessing that the multi meter can serve as a charge level indicator for the 36 volt battery pack. Fully charged, the meter reads 38.4 across the spade terminals on the relay. It reads 39.1 across the batteries terminal posts. Is that difference to be expected?
After running the car, what reading would indicate that it needs to be recharged? If the reading falls below 36 volts, will the car still operate?
Is the analog golf cart charge meter providing the same information as the digital multi meter?
I'd like to add a secret kill switch for security. Would interrupting the positive wire on the forward side spade terminal of the relay be a good plan?