V2G Vehicle-to-Grid capability

[Everest]

I paid €1584 (Euros) for 15kWh of batteries including battery box and all busbars etc delivered free from the EU.

The prices I quoted above were for fully built systems in the UK.

If you are prepared to do a mild amount of DIY, then in the UK you can buy 15kWh kits based on the Seplos case and BMS and grade A EVE cells for under £1600 - from a reputable UK supplier too.

 

[ElectricBenSolar]

We have a home MicroGrid system which has a 16A Commando Socket input that we can program to pull any power level from any AC source, including EVs with V2L. We use both our Cyberster GT and Genesis GV60 Sport Plus to power our system if required, which is further backed up by 15kWp Solar PV and 45kWh of static Battery Storage. The Cyberster will discharge to 50%, and the GV60 to 20% if required. Each can deliver a maximum of 3.6kW of power. The GV60 will typically provide 2.5kW of power for 24 hours, and the Cyberster for 15h, almost 40 hours combined. Total storage in the system is effectively 145kWh. This setup is programmable for any EV with any level of V2L capabilities.

As others have suggested, there should be a separate thread for Vehicle to Load (V2L) or V2X V2G and V2H, as they're all related to the same solution.

This sounds really interesting!

 

[Exdro]

Solax 5.8kwh bats currently about £1400 each. 4 Yr old MG EV £5k (tongue in cheek)

And that “old” MG probably has a 70kWh battery with at least 89% left!

 

[craggy]

Does anyone know if MG are looking at V2G capability for any of the the existing models as an upgrade or any of the future models?

Regards, Chris.

I found this searching on the web:

InterControl using an Ambibox GmbH bidirectional charger successfully trialled V2H/V2G with the MG4 without any additional modifications. The demonstration was shared on a LinkedIn post. The MG4 is one of several EVs that is capable if vehicle-to-load (V2L), this however was the first demonstration of vehicle-to-home (V2H).

MORE: MG4 Becomes Australia's Cheapest EV

MG Finland and Hedin Automotive provided the MG4 for testing purposes. During the test the MG4 was discharged at up to 10kW.

While MG has not officially confirmed MG EVs are capable of V2H/V2G, the provision of the vehicle for the purposes of this test, indicate it will likely be supported in the future.

Seeing as it’s 10kW I’m assuming it’s done over CCS As the v2l is only upto 7kW and does involve manually turning it on in the car first. CCs does have direct control of the battery so would be easier to implement. It would mean a much bigger and costly charger though.

 

[MickeySw]

I looked into this a while back, and the biggest hurdle seems to be the lack of compatible chargers and energy providers supporting it. The tech is promising, but adoption is pretty slow.

Probably not cheap, but there are providers out there, just one example

Quasar 2 Bidirectional Charger - V2H & V2G Charger | Wallbox

Quasar 2 bidirectional charger enables vehicle-to-grid and vehicle-to-home charging. Advanced energy management and sustainable. Install Wallbox today!

wallbox.com

 

[Everest]

Will it be cost effective though? I'm struggling to see any meaningful ROI compared to using a domestic ESS battery system.

Providing house backup for long periods of power cuts is a different matter and one that the size of an EV's battery will be hugely beneficial. But in the (most of) the UK, it seems that we rarely have power cuts of more than a few hours these days.

 

[Barrie]

I use my MG Marvel battery to back up my home battery which is cost effective ? You just need a battery charger connected to the EV and then to your home battery.

 

[Everest]

I use my MG Marvel battery to back up my home battery which is cost effective ? You just need a battery charger connected to the EV and then to your home battery.

Sure - with solar and/or very cheap overnight tariff that is cost-effecting. I was referring above to the costs of a bi-directional V2H or V2G charging system and not having a domestic battery system.

 

[MickeySw]

Sure - with solar and/or very cheap overnight tariff that is cost-effecting. I was referring above to the costs of a bi-directional V2H or V2G charging system and not having a domestic battery system.

Probably doesn’t make much sense presently, but when energy providers stop paying for excess solar energy, getting a cheap pre-loved EV and park it outside the house could be cost effective..

 

[Pebblefeline]

Don’t looks as though a bi directional charger is about 3 grand (pounds)

Looks pretty attractive considering a powerwall is 7 ish

Do you need DNOapproval? I assume so

 

[wattmatters]

The unit next off the block here most likely to be V2H/G capable/certified is the Sigenergy DC charger. It's not a standalone unit, needs to be part of the Sigenergy stack (inverter + battery) and costs ~A$7k for the 12.5 kW unit and A$8.5k for the 25 kW unit.

It would also require the car manufacturer to approve/enable V2H/G use and the local power distribution company to also approve its use.

It's an awful lot of coin which frankly would be better used to add more home battery capacity.

 

[MickeySw]

The unit next off the block here most likely to be V2H/G capable/certified is the Sigenergy DC charger. It's not a standalone unit, needs to be part of the Sigenergy stack (inverter + battery) and costs ~A$7k for the 12.5 kW unit and A$8.5k for the 25 kW unit.

It would also require the car manufacturer to approve/enable V2H/G use and the local power distribution company to also approve its use.

It's an awful lot of coin which frankly would be better used to add more home battery capacity.

Once solid state battery operated EVs are well established (5 years?), you will get ‘old tech’ EVs as cheap as chips and bi-directional DC chargers will be the norm, at least according to my crystal ball ….