Kurt
10 kW
Based on the graph below data taken from (Tesla roadster) It takes 250whr Mile to maintain 60mph flat ground no wind.
It takes 15kw of power to maintain 60mph
finally the last graph gives some indication of how the power is being consumed to do move the car.
I was researching this basic data to look into the feasibility of converting a small mid 80's Honda civic (very light wight and very aerodynamic base car) Into a EV.
It's a 60mile trip from my house in the city to my off grid home in the country. The trip consists of the first 10miles light city driving at 35mph to get out of the city .Then 40 miles highway driving at 60mph then exiting the highway the last 10 miles are country driving at around 30 - 40mph.
Looking at the graph's above and factoring in say a head wind and hills and other unforeseen inefficacy's I am going to use the 60mph data for the entire 60 mile trip . 250wh mile over the entire 60 mile trip. I get 15,000 whr consumption. Most commercially available small EV's that state a max 60mile range I noticed have around 16,000kwh battery packs so I guess I am being conservative?
I would then have two days to recharge the battery pack over the weekend from PV's. I would install an additional 4kw of pv on my workshop to change the car . I would need to make 8kwh a day over two days to recharge before returning the 60miles to the city again. This kind of weekend charging and return trip would only be temporary until I move permanently to the country home.
Long term use of the EV would be mostly perhaps one 10 - 30 mile trips in the local area each day. But I feel having the 60mile range to be able to comfortably reach the capital city of my state. Many other significant locations are within 60 miles of the country home so 60 mile range is a big advantage.
My wife had a good idea regarding my workshop. It' s a 120m2 - roof- floor area with all kinds of power tools to power from small drill to mills, lathes and welders and lighting. The workshops power it yet to be connected to the homes off grid power unit. The idea was to to perhaps keep the workshops off grid system separate to the homes. Her idea was the EV could plug (dock) into the workshop and its 4kw of pv's. The pv's on the workshop would charge the EV's 15 - 20kwh battery. but then the Ev's battery could then be used to power the workshop. When the EV is being used. A switch could return the workshop to using the homes 60kwh battery's and inverter.
The ev's battery's would only see light loads and perhaps a few kw hrs of load from the workshop a day but at least they would be of some use while not using the car.
Given that the range goal is 60 miles then the return trip range is only 30 mile's . i am fine with that as any return trip in one day would be within this range. I had a idea that when traveling long distances More than 60 mile' sin one day usually just for leisure. My idea was I can rent a powered camping sight each evening. I would need to do this anyhow to have some where to shower and sleep for the night. All powered camp sights have 240v 10a plug in Australia. Camp sights are available in more or less every town big or small.I could do a evening recharge in 6 - 8 hrs. Many campers run 2400w electric heaters all night or AC units so I don't feel guilty about using my 15kwh to recharge. I would be just getting my moneys worth LOL . I think you pay on average around $5 extra for a powered sight and at .25c kwh I would only be using $3.75 worth.
So at this stage i am just looking at the feasibility of this EV. Paralytically cost and if I am in the ball park with the numbers before hunting for parts. Fabrication is not a issue as I have a trade in machining and fabrication and have all the gear to fabricate the build. I spent 15 years building modified 80's Honda's so know them like the back of my hand. I have about 7 years experience building and experimenting with e bikes so my thinking is I am just scaling things up. I just have to stop thinking hobby king when it comes to battery's LOL
This is the model civic i would like to use as they are just so light weight and compact yet have a surprising amount of room for battery's and so on. Also they are very low and frontal drag is very good . + I have a soft spot for them after owning one and then more for 15 years . My modified 84 weighed only 700kg when i was finished with it :lol:
Part of the reason I want to use the old honda hatch is all the new cars are so dam heavy, tall in the body and just dam BIG! yet not that big where is counts. Also the simple suspension and body design makes modifying and retrofitting components to them very easy. I also think the drive line - gearbox was very efficient on the early honda's.
Man there is no way in hell I would have thought that my very first car at 16yo would be fully electric 20 years down the track
Example pic of 84 Honda civic hatch I would want to use
Anyhow at this stage looking into cost and components.
Kurt
It takes 15kw of power to maintain 60mph
finally the last graph gives some indication of how the power is being consumed to do move the car.
I was researching this basic data to look into the feasibility of converting a small mid 80's Honda civic (very light wight and very aerodynamic base car) Into a EV.
It's a 60mile trip from my house in the city to my off grid home in the country. The trip consists of the first 10miles light city driving at 35mph to get out of the city .Then 40 miles highway driving at 60mph then exiting the highway the last 10 miles are country driving at around 30 - 40mph.
Looking at the graph's above and factoring in say a head wind and hills and other unforeseen inefficacy's I am going to use the 60mph data for the entire 60 mile trip . 250wh mile over the entire 60 mile trip. I get 15,000 whr consumption. Most commercially available small EV's that state a max 60mile range I noticed have around 16,000kwh battery packs so I guess I am being conservative?
I would then have two days to recharge the battery pack over the weekend from PV's. I would install an additional 4kw of pv on my workshop to change the car . I would need to make 8kwh a day over two days to recharge before returning the 60miles to the city again. This kind of weekend charging and return trip would only be temporary until I move permanently to the country home.
Long term use of the EV would be mostly perhaps one 10 - 30 mile trips in the local area each day. But I feel having the 60mile range to be able to comfortably reach the capital city of my state. Many other significant locations are within 60 miles of the country home so 60 mile range is a big advantage.
My wife had a good idea regarding my workshop. It' s a 120m2 - roof- floor area with all kinds of power tools to power from small drill to mills, lathes and welders and lighting. The workshops power it yet to be connected to the homes off grid power unit. The idea was to to perhaps keep the workshops off grid system separate to the homes. Her idea was the EV could plug (dock) into the workshop and its 4kw of pv's. The pv's on the workshop would charge the EV's 15 - 20kwh battery. but then the Ev's battery could then be used to power the workshop. When the EV is being used. A switch could return the workshop to using the homes 60kwh battery's and inverter.
The ev's battery's would only see light loads and perhaps a few kw hrs of load from the workshop a day but at least they would be of some use while not using the car.
Given that the range goal is 60 miles then the return trip range is only 30 mile's . i am fine with that as any return trip in one day would be within this range. I had a idea that when traveling long distances More than 60 mile' sin one day usually just for leisure. My idea was I can rent a powered camping sight each evening. I would need to do this anyhow to have some where to shower and sleep for the night. All powered camp sights have 240v 10a plug in Australia. Camp sights are available in more or less every town big or small.I could do a evening recharge in 6 - 8 hrs. Many campers run 2400w electric heaters all night or AC units so I don't feel guilty about using my 15kwh to recharge. I would be just getting my moneys worth LOL . I think you pay on average around $5 extra for a powered sight and at .25c kwh I would only be using $3.75 worth.
So at this stage i am just looking at the feasibility of this EV. Paralytically cost and if I am in the ball park with the numbers before hunting for parts. Fabrication is not a issue as I have a trade in machining and fabrication and have all the gear to fabricate the build. I spent 15 years building modified 80's Honda's so know them like the back of my hand. I have about 7 years experience building and experimenting with e bikes so my thinking is I am just scaling things up. I just have to stop thinking hobby king when it comes to battery's LOL
This is the model civic i would like to use as they are just so light weight and compact yet have a surprising amount of room for battery's and so on. Also they are very low and frontal drag is very good . + I have a soft spot for them after owning one and then more for 15 years . My modified 84 weighed only 700kg when i was finished with it :lol:
Part of the reason I want to use the old honda hatch is all the new cars are so dam heavy, tall in the body and just dam BIG! yet not that big where is counts. Also the simple suspension and body design makes modifying and retrofitting components to them very easy. I also think the drive line - gearbox was very efficient on the early honda's.
Man there is no way in hell I would have thought that my very first car at 16yo would be fully electric 20 years down the track
Example pic of 84 Honda civic hatch I would want to use
Anyhow at this stage looking into cost and components.
Kurt