Solar Power Charging
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From: WI
17 E43; 21 GLS580
Where the juice comes from doesn't matter. Just be aware that when your EV is plugged in it will consume all of whatever your panels produce in a good day and then some since the car will be drawing 9.5 kw. The average home solar installation produces a max of 6 kw. Of course, you probably will not need to charge every day (I charge every 2 weeks) but those are the numbers.
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223.168 & 213.012 & 906.633 & 214.005
https://mbworld.org/forums/eqs/83842...max-speed.html
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Where the juice comes from doesn't matter. Just be aware that when your EV is plugged in it will consume all of whatever your panels produce in a good day and then some since the car will be drawing 9.5 kw. The average home solar installation produces a max of 6 kw. Of course, you probably will not need to charge every day (I charge every 2 weeks) but those are the numbers.
Edit: of course, if you think about it.....why would this be worse on the home battery than it would on the car battery? I told you it intrigued me....
Last edited by hlothery; Jul 2, 2022 at 05:31 PM.
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Joined: Jun 2022
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EQS 450+
We have an off grid home charging both an EQS and a VW ID.4.....we don't really have a problem keeping them both topped up to 80% most days.
We simply only charge when the sun is out. On bad weather days we skip charging the cars. On our daily travels they rarely drop below 50% SOC....so around 4 to 5 hours to get back to 80%
We simply only charge when the sun is out. On bad weather days we skip charging the cars. On our daily travels they rarely drop below 50% SOC....so around 4 to 5 hours to get back to 80%
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From: Atlanta
2022 Mercedes EQS 580
I haven't done it but would love to do it. I have looked into it extensively and plan to install on the new house we have been building. The economics used to be amazing, but not sure now the prices of panels have gone up.
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Wether panel cost come down in price, as demand increases is anyone’s guess. For me the main consideration was battery/backup cost, efficiency, as well as being a potential fire hazard was a concern. The new Lithium iron phosphate batteries are safe and prices are coming off, and the 26% FTC is ending this year.
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MBWorld Fanatic!
Joined: Dec 2006
Posts: 6,501
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
We have an off grid home charging both an EQS and a VW ID.4.....we don't really have a problem keeping them both topped up to 80% most days.
We simply only charge when the sun is out. On bad weather days we skip charging the cars. On our daily travels they rarely drop below 50% SOC....so around 4 to 5 hours to get back to 80%
We simply only charge when the sun is out. On bad weather days we skip charging the cars. On our daily travels they rarely drop below 50% SOC....so around 4 to 5 hours to get back to 80%
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Thread Starter
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From: USA
BMW
I’ve looked at solar in 2017 and 2019, at that time the panels were unsightly and storage was dangerous, expensive, and not very efficient. Battery offerings today while still not cheap, represent a solid investment. Some warranting 10,000 cycles at 90% battery retention over a 25 year period. Panels are more ascetically pleasing and many manufacturers and dealers have had time by now to either build solid track record or not. Unfortunately the industry is plagued with uneducated, pushy salesmen and shady dealers who give the industry a bad name.
MBWorld Fanatic!
Joined: Oct 2014
Posts: 4,524
Likes: 1,181
From: WI
17 E43; 21 GLS580
I’ve looked at solar in 2017 and 2019, at that time the panels were unsightly and storage was dangerous, expensive, and not very efficient. Battery offerings today while still not cheap, represent a solid investment. Some warranting 10,000 cycles at 90% battery retention over a 25 year period. Panels are more ascetically pleasing and many manufacturers and dealers have had time by now to either build solid track record or not. Unfortunately the industry is plagued with uneducated, pushy salesmen and shady dealers who give the industry a bad name.
Last edited by c4004matic; Jul 6, 2022 at 01:23 PM.
Newbie
Joined: Jun 2022
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EQS 450+
We have batteries for the solar system. The house and the cars mainly take power from the sun in the day. We fall back to battery after sundown until the morning and we make sure the cars are not charging then.
I work from home and appreciate this model would not work for everyyone.
I work from home and appreciate this model would not work for everyyone.
Thread Starter
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Joined: May 2022
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From: USA
BMW
Sadly our power company limits residential homes to 25 kW systems. We’re installing a 24.6 kW with 54 kWh of battery backup. Our electrician installed our ChargePoint yesterday, and shared that he had a conversation with a power company employee the other day who said the power company intends to charge the peak rate 24/7, due to EV charging at night.
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Joined: Sep 2021
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S580
Sadly our power company limits residential homes to 25 kW systems. We’re installing a 24.6 kW with 54 kWh of battery backup. Our electrician installed our ChargePoint yesterday, and shared that he had a conversation with a power company employee the other day who said the power company intends to charge the peak rate 24/7, due to EV charging at night.
My understanding is that the power company credits the excess electricity at 75 cents on the dollar and the credits last up to a year. So basically if you need more energy, you can get back up to75% of what you over produce, but ONLY if you actually use it. There is never a cash credit and the power company keeps the leftover.
If I had my installation a few months earlier I would have been locked into .81 on the dollar, and people who got solar after me are getting less. The thing is, if they never give you a cash credit of unused energy, why would they care if you have an over sized system? It seems it would only be good for them.
When I got the solar, I added up the power on my 12 months of bills prior and it was between 10-11 (don't know the term) kagillion watts. My system puts out about 16+ (same unit) a year, so I hope that will also cover an electric car. Also, I told the solar contractor that I would give him the job if he also added a 60 amp circuit to the panel and run wire/conduit to the location between the 2 garage doors (about 20 feet), so it's ready for a charger. He was happy to do that so I am ready when I get EQS
.
Thread Starter
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From: USA
BMW
@Old Rocker That sounds like you should be covered with your overage. The average American puts 13,000 miles per year on their automobiles, Not really sure what the real world miles per kWh for the 580 are, but I think it very well may average out to 3.5 miles per kWH, that would equate to 3,714 kWh per year for charging. If your +5kW overage per year with your solar system you should have no problems, no matter when you charge.
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S580
@Old Rocker That sounds like you should be covered with your overage. The average American puts 13,000 miles per year on their automobiles, Not really sure what the real world miles per kWh for the 580 are, but I think it very well may average out to 3.5 miles per kWH, that would equate to 3,714 kWh per year for charging. If your +5kW overage per year with your solar system you should have no problems, no matter when you charge.
Even though I KNOW I produce enough, I still find myself conserving when I can. ...it's my nature not to waste, but also that I can use as much as I want and not have to pay anymore. For me solar was a good investment. My area has well over 99% reliability so I don't find the need for a battery system on the house.
Now to dig that water well out back... Kidding!
