So I use a Porsche tender and unfortunately either there was a power outage or the POS tender just turned off which is sometimes does.

Hadn’t driven the car in over a week and the battery was dead. Of course I didn’t realize that before unplugging the tender and closing the frunk.

Im trying to use a Noco GB20 jump unit on the red tab in the fuse box as per several videos to give some juice so I can open the frunk.

No luck. Any ideas?

 

You must use the FOB frunk button, not the the switch on the rocker panel...see if that works for you.

 

Thanks, tried both. Several times.

Tried this video as well, similar NOCO jumper though his is more powerful.


Maybe the GB20 isn't giving it enough juice?

 

You may want to check out the "manual override" feature on the GB20. See video here: https://no.co/gb20/how-to

If the GB20 doesn't see min 2volts, it won't provide boost power unless you switch it into manual override. Seems obvious to say, but double triple check your connections are correct.

If your lithium battery got low enough that the BMS went into self-protect... the battery will show 0v, and you might have to "wake" the BMS system. I'm sure some searching will get you to some how-tos on this.

 

Use a car battery, not a jump box, on the red tab. Then use the fob. Should work. The jump boxes don’t give enough juice to allow it to work.

 

As posted above, you must switch to manual override. Any jump box that can start a car, can pop a trunk. Not many people have a spare auto battery in their garage, I guess you could go out and buy a basic one at an auto parts store. Make sure it’s charged up.

 

Manual override is what I did. Ie press and hold the 12v button until it starts flashing.

 

Most of the portable lithium jump boxes don’t put out enough power, I don’t pretend to know the why of it, maybe some do, but I have personal experience in addition to other threads supporting my statement. My fully charged up antigravity lithium jump box failed to open the frunk with a dead battery but a car battery and jumper cables worked instantly. I guess you could go buy another battery, but all you really need is the other car that it seems most porsche owners have and jumper cables?

 

Manual override has worked twice for me.

 

Not in every case, sometimes you need the battery, jump boxes don't always work to power the trunk fuse.

 

Any fully charged and properly working jump box will.

 

Thanks. Will need to see if my jumper cables are long enough. If I go this route I assume it’s the same procedure as jumping a car?

Red on the car battery, red to the red tab in the fuse box. Then black on the car battery and other side to the door jam on the 911. Start the car then use the fob to open the frunk?

 

About Opening the Frunk on a Modern Porsche…

As many have mentioned, you can pop the frunk using a jump starter or a well-charged motorcycle/car battery by connecting to the red bus in the fuse panel and a good ground. Often you’ll also need to use the key fob rather than the interior switch. The issue is that this method does not always work reliably.

Common reasons:
- The jump starter may not be fully charged or powerful enough

- The ground connection may not be solid

- And as we found in testing, the wiring through the fuse panel is thin gauge and does not transfer voltage/current as efficiently as you’d expect

So while it can work, it’s not the most dependable solution.

A More Reliable Method....

Back in 2020, after I locked myself out of my GT3RS, we designed a better solution. It’s a simple wiring kit that connects directly to the vehicle’s battery and routes to the passenger-side frunk/windshield junction. If your battery ever goes completely dead, you simply plug in our Antigravity MICRO-START XP-20 (takes about one second), and you can immediately power the car — open the frunk or start the vehicle. We call it the Clampless Harness Kit because it functions like clamping a jump starter directly to the battery — except it’s already hard-wired in. No clamps. No accessing the battery necesary. No messing with thefuse panel. Just plug in and pop the frunk or start the Car, it works like so well because it connects at the battery terminals, it energizes the entire car as if the car has fully charged battery.

Benefits of This Method

- Works consistently — direct battery connection means full power delivery

- Simple installation — loosen battery nuts, slide ring terminals behind loosened nuts, retighten, route to passenger-side frunk/windshield junction, and tuck away (includes weather cap)

- No fuse panel access required

- No guessing about ground connections since it has a perfect ground when connected to MICRO-START XP-20

- Provides stronger, more direct power to the frunk release mechanism

If you have a Porsche Lithium Battery (992 models), the XP-20 can also wake up the lithium battery from sleep/protection mode which can be a massive benefit and allow you to get a charrge back into the Porsche Factory Lithium Battery.

Here's the Links to these product....

XP-20 Jump Starter:
https://antigravitybatteries.com/pro...-starts/xp-20/ we have a heavy duty version of the XP-20 called the XP-20-HD... it has a 24,000mah battery compared to a 20,000mah battery ( more power more capacity)

Clampless Harness Kit:
https://antigravitybatteries.com/pro...arness-msa10c/

On the Charger Issue…

Make sure your charger has automatic power reset. If your house/garage loses power, your charger should automatically resume charging when power returns — using the same settings as before. Without this feature, you could return to a fully discharged battery. Our Antigravity Super Chargers have this built in. If power goes out, they automatically resume charging when power returns. They also feature: Digital display with real-time voltage and current read out, no more dummy light LEDs. Charges Lead/AGM and Lithium batteries and does alot more, its a significant upgrade over older-style chargers like traditional CTEK units.

Super Charger:
https://antigravitybatteries.com/pro...hargers/sc-10/

 

Here is another thing you might encouter with your over-discharge incident on the Factory Porsche Lithium Battery...

The Porsche Factory Lithium battery has a known issue that is if goes into it's SLEEP/PROTECTION mode, you may not be able to awaken it our of this mode. This is a significant problem inherant in the Porsche Factory Lithium Batteries due to a faulty relay and programming. If it occurs because the Porsche Lithium Battery is basically dead, and not usable anymore. The sleep/protection mode is typical on all Lithium Batteries and protects the Lithium Battery from damage due to over-discharge and other potential issues, which is a great thing, but if it fails in Porsche Batteries then it doesn't allow the battery to wake up. Furthermore, the bigger part of this issue is that Porsche made a "proprietary battery and system" that only allows you to replace this battery with the exact same Porsche Lithium Battery. But SPOILER ALERT Antigravity Batteries recently developed a kit that allows you to put either and Antigravity Lithium Battery in your Car or an AGM if you encounter this problem in your Lithium equipped 992.

If your Porsche 992 Lithium Battery fails here are your options....

- Complain to Porsche and hope they warranty it, ask for this warranty and stomp your feet and hope they give allow for it. It will be under the emmissions section of the warranty that includes the Factory Porsche Lithium Battery.
- Some companies on ebay offer you to send them your Battery, they open it and reset/reprogram the BMS so you battery wakes up.... but this might be throwing good money after bad being if you let is over-discharge again it will have the same issue.
- Buy another proprietary Porsche Lithium Battery, very expensive and may run into the same problem again,

- Try the Antigravity Porsche 992 conversion kit.... the kit is done, but we are finalizing our packaging, manuals and getting it ready for listing on our webstien.... so we expect to have 10 kits ready next by week but then full stock in about 2 weeks later....

We are going to do a PSA post about it because this is a big issue for this 992 Lithium equpped Cars.... I'll try to post a pic a little later

 

I need to stop reading battery charging threads.

I purchased the Antigravity SC-10 Super Charger a week ago, and now just placed an order for the Antigravity XP-20 Micro-Start Jump Starter.

https://antigravitybatteries.com/pro...hargers/sc-10/

https://antigravitybatteries.com/pro...-starts/xp-20/