What prevents using the battery as is, at 400V, and solar panels at similar voltage? Maybe this needs an emulator so the battery thinks it's still in a car?
Nothing stopping it other than I already had the 48V inverter. "Dala's EV repair" ( ua-cam.com/video/QCXeLO6gFRA/v-deo.htmlsi=4VNSXLJ3f8ByNPUu ) is working on a system to connect an EV battery directly to an inverter and if I was starting from scratch it would definitely be the way I'd go about it. No BYD battery compatibility yet though
I'd use a different solar inverter that could take a HV battery and bypass all the trauma. I'd probably still use a BYD battery as a wrecked BYD would probably be cheaper than a wrecked Tesla
Not really though I guess I could throw an extension cord over the fence if they needed power in a black out. Realistically the power around here is pretty stable, we might lose power for a few hours once or twice a year at worst
@@Brendon_M It is a pitty you're not my neighbour. I also was thinking to buy the wrecked EV. I'm somewhat familiar with CAN bus but I wonder how you managed to make a control of the battery? How did you figure out what signals to send? I just wonder if I take the battery out can I charge it without doing the dismantling? Let's say if I apply required voltage to the battery 400 or something ? Dismantling seems quite involved.
Yep, SoH was at 100% still. I don't use the full capacity though, max discharge is set to 85% depth of discharge but the last 15% will automatically be used for backup power in case of loss of grid so the system can actually use the whole 60kWh. This time of year the battery is only getting down to 80% and is normally fully recharged by mid morning anyway. It's not the best to keep the cells so close to full all the time but it is what it is
My recommendation would be to install the battery to an inverter that can handle high voltage batteries so you don't have to mess around making up a 48V system. Just plug an EV battery into the inverter with an interface module and away you go
@@Brendon_M Brendan, are you sure that any battery can be charged just applying the required voltage? I suspect that it could be BMS or protection curcuit preventing doing this. Am I right?
You have worked hard to make this project come to fruition.
Congratulations on a job well done 😉👍👏👏👏👏👏
Have been waiting for this. So pleased to see how it's worked out after all of your hard work. Thanks for the video update.
Thanks for update!
if you use Goodwe 5048DES, and then you use external MPPT charger, the Goodwe inverter will unstable calculate battery SOC.
SOC is reported to the goodwe by the BMS and the separate MPPT is before the current sensing shunt so the BMS sees all power in and out of the battery
@Brendon_M Have you communication RS485/CAN between Inverter&Battery?
Yes, CAN. The ZEVA BMS is compatible with any solar inverter that can talk with the same protocol that SMA uses (which seems to be most)
@Brendon_M good, sir
What prevents using the battery as is, at 400V, and solar panels at similar voltage? Maybe this needs an emulator so the battery thinks it's still in a car?
Nothing stopping it other than I already had the 48V inverter. "Dala's EV repair" ( ua-cam.com/video/QCXeLO6gFRA/v-deo.htmlsi=4VNSXLJ3f8ByNPUu ) is working on a system to connect an EV battery directly to an inverter and if I was starting from scratch it would definitely be the way I'd go about it.
No BYD battery compatibility yet though
How many KWH do you have ? Still 60 kWh ??
@@Brendon_M That's why im gonna use a Tesla battery, there is already stuff available on the internet to talk with the BMS towards the Inverter. :)
@HermanWillems too expensive, better buy cells from china
@@giulianomelli9119i changed my plan to BYD batteries. Same as in this video. I bought 2 from scrapyard
How did you manage to accomplish all of that on your own? This is simply amazing!
It was mostly brute force and ignorance
Can't you get those plans that buy back for big $$ during peak hours... or is that some wholesale thing? It would make sense with such a huge battery.
The best buyback amount I have access to is 10¢/kWh which is just not worth it
One question.
Where did you buy that used car battery, and what was the price ?
Thanks
I bought a wrecked ATTO3 from the auctions. Realistically I probably overpaid but by the time I had it delivered to my door it cost me $11000.
@@Brendon_M 11000 usa dollar ?
AUD$11000 so a bit under USD$7000
@Brendon_M good price for 60 kw battery
Genius
If you did it again, would, you use another BYD battery or a Tesla one?
I'd use a different solar inverter that could take a HV battery and bypass all the trauma. I'd probably still use a BYD battery as a wrecked BYD would probably be cheaper than a wrecked Tesla
Olá amigo Brendon gostaria de montar uma bateria assim meu sistema solar Offgrid. Você consegue usar toda essa energia desta bateria.
Yes I can use all 60kWh but there are better batteries to do this with
Can you share (legally) electricity with neighbors?
Not really though I guess I could throw an extension cord over the fence if they needed power in a black out.
Realistically the power around here is pretty stable, we might lose power for a few hours once or twice a year at worst
@@Brendon_M It is a pitty you're not my neighbour. I also was thinking to buy the wrecked EV. I'm somewhat familiar with CAN bus but I wonder how you managed to make a control of the battery? How did you figure out what signals to send? I just wonder if I take the battery out can I charge it without doing the dismantling? Let's say if I apply required voltage to the battery 400 or something ? Dismantling seems quite involved.
Do you still have 60 kwh in capacity ?
Yep, SoH was at 100% still. I don't use the full capacity though, max discharge is set to 85% depth of discharge but the last 15% will automatically be used for backup power in case of loss of grid so the system can actually use the whole 60kWh.
This time of year the battery is only getting down to 80% and is normally fully recharged by mid morning anyway. It's not the best to keep the cells so close to full all the time but it is what it is
Do you live in Australia like me ?
Yep, Perth
I am in Brisbane, wanting to do the same thing 😊
My recommendation would be to install the battery to an inverter that can handle high voltage batteries so you don't have to mess around making up a 48V system. Just plug an EV battery into the inverter with an interface module and away you go
@@Brendon_M thank you for your videos and the time you took to explain! Are inverters like that available?? Whats the name of the phone app?
@@Brendon_M Brendan, are you sure that any battery can be charged just applying the required voltage? I suspect that it could be BMS or protection curcuit preventing doing this. Am I right?