Juicebox 40 charging issue

[nvrlucke]

Hello,

I just had a Juicebox 40 installed for my 2023 Model 3 SR. When I plug it in, I get a maximum of 12 A charging. I called Juicebox and they had me reboot the unit. That worked and got the speed up for a few minutes but then went back to 12A. I then called support again and they said the Juicebox is charging at the correct amps but it is an issue with the car and I need to bring it for service to reduce the amps which didn’t make sense to me. Has anyone else had this problem and can tell me how to fix it? I researched it on the site but couldn’t find anything definite. Thanks

 

[Soul Surfer]

I think I had read about someone on this forum, also having an issue with the brand/manufacturer. If this is your only EV, I would consider the Tesla WC3. It was actually cheaper than my SunCountry Highway L2.

 

[Sophias_dad]

I need to bring it for service to reduce the amps

Ya... they are lying or you are misunderstanding. That's just nonsense.

 

[Kimmi]

How much cheaper is a juice box compared to the Tesla wall connector?

 

[Sophias_dad]

How much cheaper is a juice box compared to the Tesla wall connector?

about -$200.... that is, $200 more expensive! Add another $100-$150 if you need it to be a plug-in, for a GFCI outlet.

 

[davewill]

How much cheaper is a juice box compared to the Tesla wall connector?

Most of the people installing them are doing so because they are covered by utility rebates.

 

[nvrlucke]

I purchased it because of PSEG rebate. I am now regretting it. Was able to charge fine with a friends level 2 Tesla charger. Spoke with another rep. from Juicebox who said it may be a problem with circuit breaker. He said if the wiring is correct they will warranty it. Going to attempt to use another Juicebox with my plug and see if that works and go from there.

 

[Bikeman]

My old (7 years) JuiceBox 40, which has been faithfully pumping out 32A and 7kW on 240v is now only performing at 12A and 2kW. Dunno what is going on. Do these have only a useful life limit? Odd that it is still working but at a greatly reduced power. Any ideas?

 

[davewill]

My old (7 years) JuiceBox 40, which has been faithfully pumping out 32A and 7kW on 240v is now only performing at 12A and 2kW. Dunno what is going on. Do these have only a useful life limit? Odd that it is still working but at a greatly reduced power. Any ideas?

Those old Juiceboxes use a potentiometer to set the charge limit. They do go bad sometimes. Or it could be a bad solder joint.

You could always replace the electronics with OpenEVSE hardware.

 

[cali8484]

My old (7 years) JuiceBox 40, which has been faithfully pumping out 32A and 7kW on 240v is now only performing at 12A and 2kW. Dunno what is going on. Do these have only a useful life limit? Odd that it is still working but at a greatly reduced power. Any ideas?

Same EV? Does the EV show charging parameters (voltage, current limit and actual, etc) matching the actual? You should check the voltage feeding the JuiceBox while it's charging. If it's much lower than the no load voltage then there could be issues with the supply wiring/devices including a breaker going bad.

 

[nvrlucke]

Mine was an issue with the breaker at the panel. Electrician came out and fixed it quickly. One side of the 14-50 outlet was showing correct and the other wasn’t.

 

[Bikeman]

Same EV? Does the EV show charging parameters (voltage, current limit and actual, etc) matching the actual? You should check the voltage feeding the JuiceBox while it's charging. If it's much lower than the no load voltage then there could be issues with the supply wiring/devices including a breaker going bad.

Luckily, we have a few charging backups. A couple 110v slow chargers and the Tesla Mobile kit which can do 240v 7kW at 32A. I used the Tesla kit to quickly add 25% to the Y last night before I had to drive up north to work today. The half broken JuiceBox40 would have me charge for a half day. So I know the power to the JuiceBox isn't the issue.

I will be trying again to hook the JB up from scratch and testing it on both our cars. The Tesla isn't limiting the charging and it isn't the breaker or anything on the panel side. Still a puzzle.