EP416 - Tesla Off-Grid charging. Verdict and how I do it now. Day 5
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- เผยแพร่เมื่อ 5 ต.ค. 2024
- Here is the missing part 5 of the off-grid charging challenge with the Teslander. As we have experienced in the previous 4 episodes, the energy of a 1.2kW solar system is hardly enough to keep us charged for a few days. The range went down every day and we could not recharge to the level of the provious day.
A few months later, I now have upgraded my solar to 4kW and the situation is a totally different one. I can now generate up to 21kWh per day and this far enough for 5-6kWh I'm using to recharge the vehicle for my commute.
With the new version of the Tesla app, we can also change the charging speed remotely and I can adapt this to the solar output. Just like a Zappi, just manually. The Zappi, yeah... but how does this work with a Tesla? Anyone?
EP347 - Which is the best charging speed for the Model 3?
• EP347 - Which is the b...
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I went off grid ten years ago and built my own home single-handedly. In June 2021 I bought a Tesla model 3 and wanted to charge it using the sun. Here is my setup: I have three 300 watt panels. I have a flat roof and leave them flat as I live in the middle of Oregon. (If I tried to point them south I would only get rays between 11am and 2 pm.) On a sunny day I get almost 800 watts. I feed this energy into a 60 amp MPPT charge controller keeping six 100 amp hour Battle Borne batteries charged. The key is using a 3500 watt inverter (pure sine wave). On a sunny day my Tesla wants 1500 watts if I set it to 12 amps and get 6 miles of range. On a cloudy day I need 1000 watts so I change the Tesla charging down to 8 amps and get 4 miles of range. I use thick wires so I do not loose current and protect batteries and inverter with 300 amp and 200 amp circuit breakers. If I tried to use 12 amps it would drain the batteries real quick so I keep it at 10 or 8 amps and it charges for 14 hours a day. This actually is as good as if not better than someone on the grid using 120 volts AC.
Yes but The problem you have is that u use one battery, to charge another battery! The goal should be a completely independent system, without battery, only with an inverter charging directly from the sun and giving it directly to the car, without any battery
You could use the Victron EV charger. It works off grid and has a state of charge cut off. I think you can set a negative excess so it always charges at 6A and ramps up. If not you can install the large firmware and use node red to control (or write some custom MODBUS control).
Andy, you were smart to use a Victron, low frequency, transformer based inverter charger instead of one of those low cost, high frequency, transformerless inverters that everyone is selling nowadays. High frequency, transformerless inverters provide a much lower surge capacity and a shorter life expectancy than heavy duty, low frequency, transformer-based inverters. Additionally. high frequency, transformerless inverters do not provide any galvanic isolation between the DC boost stage of the inverter and its AC output which during a catastrophic failure of the inverter's control circuitry, can allow high amperage DC current to pass through to your EV's onboard charger and damage it. A high frequency inverter may be able to charge an EV short term, but it would just a matter of time before the MOSFETs or IGBTs that are used in these inverters fail and you can kiss your EV's onboard charger goodbye.
How has the situation changed in the last two years? Will we see an update on this video?
🐸🐸🐸
They are not clouds. You should live in Wales.
Welcome back Andy, I've missed your videos.
Hey, thanks!
Good vid & info here Andy, will be keeping an eye on this channel as well as ur OGG channel Im totally addicted to atm.
Hope the Off Grid Garage doesn’t have to suffer to much loss for Unplugged EV, but you can only do so much Andy, and you really do! Thanks for all ur great information & experiments u do, these are real world tests & we all learn so much from all this content on ur channels, keep it up, Thanks again & Cheers
Hi Andy, I discovered your EV channel recently, nice... I always wondered why we always charge by AC while we all know DC has the future... Have you ever thought/heard about a 48V to CCS DC low speed charger?
great challenge
And it even works now with the larger solar setup. At least 6 months of the year, I can now charge from the off-grid system.
I have a small hobby size solar power system, that I've been using to power my electric scooter. Haven't had to use grid power for the scooter in months.
Cool! It's great, right?!
@@unpluggedEV yep, solar is awesome. Just complicated to make a system that will pay for itself within a few years.
Our LFP M3SR+ mean we can use it as a storage system with no excess charge level worries now……..so much happier !
The LFP M3 is a great car. I would not mind it either. The 1s less acceleration... who cares....
Andy, if you use the “15a” granny tail with a 15a female to 10a converter (I just made a 1m extension) then plug it into a 10a, you can charge at 10a, not 8a (which you get if you use the “10a” tail)
I know, I have the adapter here so can even charge on 12A from a normal outlet. The questions is, do you need to charge that fast...
The best unplugged yt show is back 😁
Tesla X doesn't't have current button on app 😔
It doesn't? Oh, what the FROG!
How many km do you drive per year? In Australia you have more sun than we have in the UK. I have 11.75kw solar. One of our EVs (Kia Soul) does 20,000km/year. From March-November we were able to stay off grid with the charging but in UK winter with many grey days we have to resort to the grid. Next year we plan to expand to 20kw solar to cope with my recently purchased Tesla as well. Your comments about the efficiency v charge speed are interesting. My main off grid supply uses 48kwh fork lift truck batteries. They struggle a bit when cold with the 7kw charger producing less efficiency than the slower 2.25kw 'granny' charger. The Kia can't choose charge speed like the Tesla so following your lead I will find out what is the best charge speed for the fork lift truck batteries and compare the results against my 28kwh mobile LFP pack. Given that I don't take the lead acid pack below 50% the newer LFP pack is a lot more capable. Shame the LFPs weren't available a year earlier.
Thanks for your donation again, Nigel!
I've totally forgotten to link the video about the charging speed test. This is now in the video as well as in the description.
I drive probably a bit less than 20k a year. In winter time I won't have enough incoming solar to fully charge the vehicle but I will be able to replace some of the energy needed from the off grid system.
@@unpluggedEV It is interesting to me that even in sunny Australia at your latitudes that winter charging is so limiting. My experience shows that sun v cloud and length of daylight hours/day is more significant than sun angle. At midday in winter I can still exceed 6kw on a 11kw system (the panels face south @ 30 degrees to the horizontal) . However if it is cloudy the output goes right down to a few hundred watts at best. Even in summer the PV power can drop to about 30% with cloud but the longer days are a big benefit (only 8hrs daylight/day here at the moment☹️).
You also have the advantage of living on site with your solar. Most of mine is 2km away from home. I am just starting to make up a second solar trailer (about 30kwh LFP) so I can flip flop the power to minimise our dependence on the grid.
Fantastic videos. I always look forward to output from both your channels. Keep up the good work.
👍 Very good information thank you, I’m about to go EV myself.
You'll have enough power in the battery to fully charge a new battery of mitsubishi outlander 😅
Yes, that would be enough to fully charge it every day from that battery. Soon we have the same storage capacity in the garage as we have in the Tesla.
Better is a dynamic EVSE... that knows how much is produced.
i think zappi does not work in a 100% OFFGRID SYSTEM you allways need the grid thanks for the video
Thanks for your comment.
I miss your mitsubishi outlander phev videos when will you get a outlander again😭😭
i have been powering my coal stove with solar tinkering around to see how good or bad it works
it has gotten me to 10 250w used trina solar panels making in our summer 12.5kwh on a good clear day.
i have been charging my chevy bolt with solar since heating season is over. i am making a bit over 200kwh a month
but this month will be quite a bit better. average im looking to make 250 to 280kwh. i can say i have not plugged into the house
but 2 hours in the last 2 months. allas being able to do this cost me 5000 dollars. so the sun is deffinatly not free.
i have around 20kwh in lifepo4 in 24v packs.
Yes!!
Ah, this guy!
Hi Andy, gr8 video. I am putting together an off-grid solar system too with 10 x 300W 12V solar panels, 2 x 12V VoltX Lithium batteries (wired in series to get 24V) and a 24V PowMr 3.2kW Inverter/Charger Controller. Today was 40°C in Sydney and I got about 178V and topped up my 2 batteries very quickly from 70% in about 10-15mins. Is this enough to trickle charge my Polestar 2 EV? as I tested the AC output by running a heat gun that uses 1.6kW power at 240V and 6.7A load, which worked fine.
Hi Andy hope you are enjoying your holiday.
One observation I have, there is alot less swearing on this channel than the off grid garage.
Are EV drivers more easily offended then off gridders?
P.S, Zero Sun and too much wind here is Scotland, we are getting battered by another storm. 😭
Good point. I guess, the Tesla just works so nothing to complain about 😁
Would a wind generator work for you in your region? I read they need a lot of wind to have decent output.
Good morning Andy The car is American give it time. 😁
I do indeed have a wind turbine, but when the wind speed is gusting to 80mph 😲, it is advised to turn it off.
If your followers go for a turbine and want stress and dissapointment go for a TESSUP turbine.
Bad build quality, false power output claims, magic black smoke out of the charge controler and non existant customer services...
A bit like Tesla 🤣🤣🤣
My Mum just this month now has an MG ZS EV and as her carer I drive for them alot. I have not driven it yet but it has given me a great excuse to stalk you on this channel and attempt to emulate you.
Hello. Recently found your videos. I’d be interested in starting with a small solar array and use the M3 as the battery. The car is home quite a bit during the day, so why not have it charging. Any suggestions? Thanks.
Have a look at my other channel here: th-cam.com/users/offgridgarageaustralia
😅16:50 “it is made in America”😁. They need to show why they claim to be the “best country” in the world.