Very possible, and best answered by @Mike Schooling .Will this unit actually work for whoever buys it, though? I'm not familiar with it, but if it needs connectivity and an account to work, then isn't there a possibility that it may be worthless to whoever buys it?
Please, if anyone reads this...If you're just looking for ways of getting power out of a vehicle's battery pack, there's probably cheaper ways of doing it, but it's not a user-friendly or polished solution, or even safe for those who aren't power electronics engineers. Don't try this at home:
Connect ChaDeMo, stand clear, signal the car's PDU contactors to close via a microcontroller using CAN bus.
Ideally monitor state of charge with Chademo protocol.
Connect DC lines of Chademo to a suitable solar inverter (grid-tie or off-grid as required) that can take the voltage range from it's string input. Actually, don't go connecting live HVDC cables. You should have done that first.
Get microcontroller to open car's contactors again if SOC falls below a threshold.
Use existing car on-board charger to charge car when power is green / free / cheaper.
This almost certainly wouldn't pass any wiring regulations or even meet with DNO approval without a large amount of safety features (fuses, earthing, etc) that I haven't described here, but it would just about work. It might be possible to do something similar with CCS, but I have no idea what the vehicle's CCS protocol controllers would think of the vehicle's battery pack SOC going down when it was expecting it to charge ,and the vehicle may decide not to close the contactors if the SOC is already at a high enough level (fully charged). With CCS you may need to somehow spoof an input DC voltage during precharge that approximately matches the pack voltage, even if you only offer a very low current.
Safe, Cheap, Usable. Choose two.
The unit is capable of exactly this (V2H) but the OVO V2G trial was grid focused so ignored the house requirements. I've been running my own unit like this for about a year, charging overnight and load match through the day.Purely out of technical interest, does anyone know if these units discharged at a fixed rate or whether they could be used to balance import to zero?
Because it's a forum that generally populated by people that haven't opted for the cheapest up-front option, but instead have tried to justify more expensive purchases (BEV, Solar, Battery) on tenuous medium to long-term return on investment.I'd like to know why.
Please, if anyone reads this...
First, dont do it.
Second, if you do, please precharge the DC before it goes into the solar inverter!
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False assumption.I'd rather have the three grand and not cause my car battery to deteriorate.
But that assumes someone would normally be charging their car up to 100%. Therefore, the inference is that V2G will be worse for long term battery health, if previously you avoided charging up to 100% every time.Super high level, you are trading time at high SOC for more throughput. The additional throughput is 'less bad' for the battery that sitting at high SOC.
Read the paper and the reportBut that assumes someone would normally be charging their car up to 100%. Therefore, the inference is that V2G will be worse for long term battery health, if previously you avoided charging up to 100% every time.
No. V2L is very differnt tech to V2G, V2H, etc.
Busy so yet to read the report but staying at the 'super high level' would additional throughtput also be less bad than sitting at very low SOC?False assumption.
One of the key outputs from our 400+ car trial over 2 years is that V2G causes marginally less battery health degradation compared to traditional charging.
Full cenex report below:
We were able to prove the theory from this WMG paper:
Super high level, you are trading time at high SOC for more throughput. The additional throughput is 'less bad' for the battery that sitting at high SOC.
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Nothing stopping someone with V2L output from their car connecting up to a transformer reducing the 250V AC to say 50V AC, then rectify that and feed into a solar-panel self-synchronising inverter. Eg could use a bank of 250W micro-inverters, and simply switch these in one-at-a-time to get multiples of 250W increments fed into the house. Wouldn't be a cheap or as efficient as a proper V2H setup of course, but do-able I reckon.No. V2L is very different tech to V2G, V2H, etc. Essentially one is grid tied, one is islanded and unable to synchronise frequency. The intelligence to manage the grid connection simply has to live at the installation.
You need to ask who benefits from encouraging V2G. If it was such a good idea, the power generating companies would buy and operate the batteries themselves; but why bother when you can get the public to pay for them.Because it's a forum that generally populated by people that haven't opted for the cheapest up-front option, but instead have tried to justify more expensive purchases (BEV, Solar, Battery) on tenuous medium to long-term return on investment.
And FYI, using a vehicle battery for V2G has very little impact on battery health. You're more often than not pulling only a few kWh in a session to avoid peak charges, or to utilise excess solar after sunset. It registers as only a small fraction of a charge/discharge cycle on a BMS.
The consumer if they're on an Agile tariff (that isn't at max the rest of the day.You need to ask who benefits from encouraging V2G.
You've missed the point, again.If it was such a good idea, the power generating companies would buy and operate the batteries themselves; but why bother when you can get the public to pay for them.
So I assume you only buy essential goods at the minimum expense. Can I ask what device you're using to access this website?I don't hold any truck with investing money in something with only a tenuous likelihood of generating a return on investment.
I had done, but couldn't see any reference to improving battery health. The only oblique reference to battery usage was the fact that 75% of the participants in the trial were (before they started in the trial) used to plugging in as soon as they got home.Read the paper and the report