Parking Battery-Power Station, 3X capacity and 3X cheaper than dedicated options + extra functionality

[stephenjones]

The River 3+ should be working; please check the connections—something must be wrong.

The River 3+, ships with the original 3-pin XT60I charging cable.
Because of this, I was under the impression that it would not work with a regular 2-pin XT60 cable.

However, much to my surprise, the River 3+ actually works with a regular XT60 cable.
Consequently, an XT60 splitter - which allows you to tap into the positive ACC signal - will also work with this power station.

I tested it and recorded a short video:

I think I see the issue on my ecoflow. There is some type of back flow from the solar/car charging input on the ecoflow. I tested the original xt60i cable and a few xt60 cables I had around. With all of them, there is power being output from the solar/car charging input port on the ecoflow. I do have the latest firmware. This has to be why the acc is always on in the setup we are trying to accomplish.

edit: it is about 3.9 volts tested with multimeter directly from the input port on the river 3 plus. Nothing else connected.

 

[GPak]

Oh, that is a known issue with EcoFlow River power stations.
Voltage is present at the XT60 input connector, but there is no actual power (I suspect some internal capacitors)
The voltage is low, though this does not affect Viofo dashcams.
However—for instance—Thinkware dashcams are sensitive to this low voltage and fail to switch into parking mode.
Which dashcam are you using?
See this post, as well as related posts, here:

Post in thread 'ECOFLOW and Viofo'

Jun 10, 2025

Welcome to DCT @ankurthakurofficial !
And thanks for sharing your findings.
A well written post describing the hardware, the problem, the cause and possible solution, I can feel the handwriting of a fellow engineer.

At first I thought maybe your River 2 was faulty, so I checked my River2, River3 and River3Plus XT60 input terminals and here are the approximate results:
River2 = 1.0V,
River3 = 1.3V
River3 Plus = 3.5V (XT60i connector)
These voltages are not relay consistent.
I then shorted these terminals through a multimeter to check if there was any current and there was...

• GPak

• 

Please keep in mind that the solutions posted there either do not work or are not particularly reliable.
We have a viable solution utilizing relay somewhere here on forum.
I will try to track it down and post the link here.

 

[stephenjones]

Oh, that is a known issue with EcoFlow River power stations.
Voltage is present at the XT60 input connector, but there is no actual power (I suspect some internal capacitors)
The voltage is low, though this does not affect Viofo dashcams.
However—for instance—Thinkware dashcams are sensitive to this low voltage and fail to switch into parking mode.
Which dashcam are you using?
See this post, as well as related posts, here:

Post in thread 'ECOFLOW and Viofo'

Jun 10, 2025

Welcome to DCT @ankurthakurofficial !
And thanks for sharing your findings.
A well written post describing the hardware, the problem, the cause and possible solution, I can feel the handwriting of a fellow engineer.

At first I thought maybe your River 2 was faulty, so I checked my River2, River3 and River3Plus XT60 input terminals and here are the approximate results:
River2 = 1.0V,
River3 = 1.3V
River3 Plus = 3.5V (XT60i connector)
These voltages are not relay consistent.
I then shorted these terminals through a multimeter to check if there was any current and there was...

• GPak

• 

Please keep in mind that the solutions posted there either do not work or are not particularly reliable.
We have a viable solution utilizing relay somewhere here on forum.
I will try to track it down and post the link here.

Thanks. I am using a black vue and I also tested a red tiger hardwire kit. The backflow seems to trigger the acc for both of those.

 

[GPak]

Here is a link with possible solution I mentioned:

Post in thread 'S1 Infinite on Bluetti Power Bank'

Oct 19, 2025

Maybe I misunderstood then...you are speaking of only powering by the Bluetti, is that correct? I am thinking of how to provision the Bluetti to function as a backup when the ignition is off.

@lufa6977, look at the attached sketch.
I think @rcg530 suggested exactly this, and it's the best solution for automatically triggering the parking ACC.

Although most, if not all, power stations are non-isolated design, meaning they share a common ground/negative, separating the power station circuit from the vehicle's circuit is still a good idea.
Of course, this adds an extra...

• GPak

• 

I'm on my lunch break and already rushing back to work.
This linked solution could be simplified/localized.
I'll try to post it here this evening.

 

[stephenjones]

Here is a link with possible solution I mentioned:

Post in thread 'S1 Infinite on Bluetti Power Bank'

Oct 19, 2025

Maybe I misunderstood then...you are speaking of only powering by the Bluetti, is that correct? I am thinking of how to provision the Bluetti to function as a backup when the ignition is off.

@lufa6977, look at the attached sketch.
I think @rcg530 suggested exactly this, and it's the best solution for automatically triggering the parking ACC.

Although most, if not all, power stations are non-isolated design, meaning they share a common ground/negative, separating the power station circuit from the vehicle's circuit is still a good idea.
Of course, this adds an extra...

• GPak

• 

I'm on my lunch break and already rushing back to work.
This linked solution could be simplified/localized.
I'll try to post it here this evening.

Sounds good. Thank you. I was going nuts trying to figure out what was happening.

 

[GPak]

Here is a video demonstrating how to resolve the "phantom voltage" issue on the XT60 input port of the EcoFlow River— that prevents dashcams (such as BlackVue, Thinkware, and Red Tiger) from entering parking mode.
Also attached is the wiring diagram for this solution.

The solution is fully localized, using a 4-pin normally open automotive Relay.
There is no need to search for an ACC power source or a ground connection elsewhere in the vehicle.

I tested this with a multimeter, however, testing with actual dashcams is needed to ensure it works.

 

[stephenjones]

Here is a video demonstrating how to resolve the "phantom voltage" issue on the XT60 input port of the EcoFlow River— that prevents dashcams (such as BlackVue, Thinkware, and Red Tiger) from entering parking mode.
Also attached is the wiring diagram for this solution.

The solution is fully localized, using a 4-pin normally open automotive Relay.
There is no need to search for an ACC power source or a ground connection elsewhere in the vehicle.

I tested this with a multimeter, however, testing with actual dashcams is needed to ensure it works.

I will test in a few days to see how it works. I thought I had a relay but had to get one.

 

[stephenjones]

Here is a video demonstrating how to resolve the "phantom voltage" issue on the XT60 input port of the EcoFlow River— that prevents dashcams (such as BlackVue, Thinkware, and Red Tiger) from entering parking mode.
Also attached is the wiring diagram for this solution.

The solution is fully localized, using a 4-pin normally open automotive Relay.
There is no need to search for an ACC power source or a ground connection elsewhere in the vehicle.

I tested this with a multimeter, however, testing with actual dashcams is needed to ensure it works.

Bench tested both BlackVue and Redriger. Both entering and existing parking mode as intended. Zero reading after installing the relay to the ecoflow. Many thanks. I will add the setup to my truck once I get some time.