Sigenergy (PointGuard) bi-directional system

[Runaway Tractor]

the CCS "bug" in Tesla EV's for V2X discharge

Explain for those of us unfamiliar?

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[v2h8484]

Explain for those of us unfamiliar?

Basically, the standard CCS protocol for DC fast charging is being used for discharging because Tesla has a "bug" and not shutting down the charging session when power is actually being discharged (i.e. reverse/negative power flow). It's something that Tesla could easily fix with OTA updates. For reference, other EV's without such "bug" the charging session would get stopped after a short time of discharging or no charging.

 

[Runaway Tractor]

So you have to start a L3 charging session, then just start discharging rather than charging?

 

[v2h8484]

So you have to start a L3 charging session, then just start discharging rather than charging?

Basically that is what the V2X converters do on EV's that only support the standard CCS protocol.

 

[tearitupsports]

The video portion on Tesla appears to show PointGuard taking advantage of the CCS "bug" in Tesla EV's for V2X discharge. Does Signenergy have any agreement with Tesla to ensure continued functionality? If not, what's Signenergy's support policy if Tesla decides to fix the CCS "bug"? This is a common concern for several V2X products on the market that work with Tesla EV's. It's perhaps a more serious concern for Signenergy because PointGuard is not just a V2X converter but also a home battery that competes directly with Tesla Powerwall. I am certainly not ready to spend $$$ on something that could be easily bricked by Tesla.

So I would say that it is not a bug. Pointguard is following the ISO standard, and luckily so is Ford.

You are correct that the difference in Tesla is that they have not come out to publicly support this, and certainly are not working with PointGuard in any fashion. Yes there is absolutely a risk that Tesla will do a software update to prevent discharge and ruin this system. I also don't think Tesla will care about any negative feedback of doing that either.

The video makes it quite clear that GM is blocking the export from the car side.

I have even been a little concerned with Ford, even though the video indicates they have publicly supported it (I haven't seen any reference to that though). Right now I still am using the gen input rather than buying the V2X module.

 

[tearitupsports]

So you have to start a L3 charging session, then just start discharging rather than charging?

Yes Enphase and Sigenergy are doing the ISO CC1 handshake to start the session over DC only for both charge and discharge.
Ford and GM use the Delta inverter which obviously does not follow any standards based design.
Tesla cybertruck is only one using AC AFAIK.

 

[v2h8484]

So I would say that it is not a bug. Pointguard is following the ISO standard, and luckily so is Ford.

Call it an "unintended feature" then. Apparently GM has updated Silverado EV firmware to fix the bug/untended feature so PG V2X no longer works.

 

[kaisersose]

As an owner, I received an email stating that the functionality is now turned on globally. It is in the version 3.1 app, which goes active for North America on Sunday the 10th. The hardware shows in stock now at distributors.

This is great! Have you tried to discharge the F-150 battery to either charge the PG battery or sell energy to the grid? I read that Ford is limiting the discharge power rate to 9.6kWh, but this guy said that was able to discharge more from his Rivian battery that what the manufacturing limits were saying:

Thanks for sharing your experience with this. I am very seriously considering to purchase this system, but is a big investment, so hearing real life stories like yours is very helpful.

 

[tearitupsports]

This is great! Have you tried to discharge the F-150 battery to either charge the PG battery or sell energy to the grid? I read that Ford is limiting the discharge power rate to 9.6kWh, but this guy said that was able to discharge more from his Rivian battery that what the manufacturing limits were saying:

Thanks for sharing your experience with this. I am very seriously considering to purchase this system, but is a big investment, so hearing real life stories like yours is very helpful.

I don’t have the V2X yet but I have used the generator input at 7kW to charge the point guard batteries.
I am hoping to get the V2X in the next couple of weeks. I should be able to do at least 19kW from the truck but I will probably set the limit to 9.6 to match the HIS system and not bring on unwanted issues.

 

[kaisersose]

I don’t have the V2X yet but I have used the generator input at 7kW to charge the point guard batteries.
I am hoping to get the V2X in the next couple of weeks. I should be able to do at least 19kW from the truck but I will probably set the limit to 9.6 to match the HIS system and not bring on unwanted issues.

Interesting.. Thanks! Do you think it will work with your battery Firmware without having to call Ford support or hack the system?

 

[JohnsonEJ23]

I just signed a deal to add solar, the PointGuard system, qty 3 of the 8kWh batteries (24kWh total), a load hub, and the V2X module to my home. Will likely be 2-3 months til turnup. Super excited.

 

[kntckyfrdchucken]

I just signed a deal to add solar, the PointGuard system, qty 3 of the 8kWh batteries (24kWh total), a load hub, and the V2X module to my home. Will likely be 2-3 months til turnup. Super excited.

Did your Pointguard dealer give you any concrete information or documentation on official support from Ford. I really would like to get this setup with my F150 lightning (and if possible use my existing solaredge inverters), but am afraid that Ford will pull the rug out from under me.

 

[JohnsonEJ23]

Did your Pointguard dealer give you any concrete information or documentation on official support from Ford. I really would like to get this setup with my F150 lightning (and if possible use my existing solaredge inverters), but am afraid that Ford will pull the rug out from under me.

I think I heard in a video somewhere that Ford referred to this system (not in a negative way) and Sigenergy (Pointguard's parent company and what they are rebranding to) shows a V2X compatibility list on their site that lists the Lightning as compatible. That's as specific as I know.

 

[tearitupsports]

Did your Pointguard dealer give you any concrete information or documentation on official support from Ford. I really would like to get this setup with my F150 lightning (and if possible use my existing solaredge inverters), but am afraid that Ford will pull the rug out from under me.

The system will work great with your existing solaredge inverters. That is exactly my setup now.

While I have not seen anything written, there are multiple companies that specifically call out the Lightning. The recent Electrek video (linked in post 27) indicates they heard it from Ford directly. Enphase also advertised with a Lightning. While nothing is guaranteed, it does work perfectly well right now.

We all know that Ford OTA's don't work, so how are they going to prevent it anyway?

 

[blb228]

I just signed a deal to add solar, the PointGuard system, qty 3 of the 8kWh batteries (24kWh total), a load hub, and the V2X module to my home. Will likely be 2-3 months til turnup. Super excited.

Any chance you have an updated status? Thanks!

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