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  #1  
Old 05-24-2019, 04:43 PM
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Doug Huffman Doug Huffman is offline
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Lithium-ion Electric Vehicle battery

We just received shipped to us an 11.6 AH 48 VDC Samsung lithium-ion 10# battery for the electric assist trike that we are assembling for Milady Wife. US$ 700.

Just imagine what an electric automobile battery will cost.
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  #2  
Old 06-18-2019, 05:17 AM
640ijims 640ijims is offline
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Doug, exactly why electric car and hybrid mfgrs give a reasonable life warranty on their batteries...cost to replace packs in some vehicles is 4 and 5 digits depending on amp hrs. Sort or like sail boats, wind is free....but to replace the sails on a modern 36 boat is 4 digits....free power? Dunno? Jim


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  #3  
Old 06-18-2019, 05:49 AM
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No power is in no way free!

The unspoken lie of solar power, beyond the cost of PV, is the Solar Constant is only 1300 watts per square meter.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 06-18-2019, 05:52 AM
640ijims 640ijims is offline
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Well put and to the point
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  #5  
Old 06-20-2019, 06:48 AM
ard ard is offline
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Quote:
Originally Posted by Doug Huffman View Post
No power is in no way free!

The unspoken lie of solar power, beyond the cost of PV, is the Solar Constant is only 1300 watts per square meter.
Lie?

Lol
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  #6  
Old 06-20-2019, 07:11 AM
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Doug Huffman Doug Huffman is offline
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Lie? Lol
Yeah, the unspoken truth is that the Solar Constant is only 1300 watts. Thanks for calling my attention to my misspeak.

We got home yesterday from the bike shop across the state that built the electric assist for her trike. It goes like stink now. The shop guy did 30 MPH on its brief test ride. She zoomed up the nearby hill that has me in low gear and gasping for breath.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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  #7  
Old 06-20-2019, 10:46 AM
namelessman namelessman is online now
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Quote:
Originally Posted by Doug Huffman View Post
No power is in no way free!

The unspoken lie of solar power, beyond the cost of PV, is the Solar Constant is only 1300 watts per square meter.
Is 1kW-ish per square meter pretty good? If there is space for 10kWh system it will easily supply most household usage provided it is clear sky around our locales.

But of course if cold fusion and/or Arc reactor is available, then there will be no need for batteries nor PV!

Last edited by namelessman; 06-20-2019 at 10:50 AM.
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Old 06-20-2019, 04:16 PM
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  #9  
Old 06-20-2019, 04:33 PM
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I think the great lie will be that if we want 100% of power to be delivered by solar, 1% of all land mass must be covered by panels....

As if anyone is saying (1) 100% of power needs to be solar and (2) other technologies (wind, gas, nuclear, etc) can be used as well.

But looking to add a few panels this year and eitehr 2 power walls or a propane generator
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Alignment here: The Definitive Alignment Thread

OE is Original Equipment aka 'BMW Original Parts' aka 'What you buy at the BMW dealer with a BMW label'

OEM is Original Equipment Manufacturer... EITHER the company that made the OE part or.... A part this is identical to the OE part, but is sold by the OEM under their own label


OEM is not what BMW sells


http://www.bimmerzone.com/category/T...ricks_OEM.html

https://www.turnermotorsport.com/t-OEvsOEM
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  #10  
Old 06-21-2019, 01:22 PM
namelessman namelessman is online now
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Quote:
Originally Posted by ard View Post
I think the great lie will be that if we want 100% of power to be delivered by solar, 1% of all land mass must be covered by panels....

As if anyone is saying (1) 100% of power needs to be solar and (2) other technologies (wind, gas, nuclear, etc) can be used as well.

But looking to add a few panels this year and eitehr 2 power walls or a propane generator
The worldwide energy consumption is roughly 25000TWh in 2017.

https://yearbook.enerdata.net/electr...tion-data.html

The earth should have more than 500 million sq-km of land mass, so 1% of that is 5 million sq-km.

At 1kW/sq-meter, or 1GW/sq-km, 5 million sq-km should produce 5000TWh of solar energy in an hour assuming 100% efficiency.

Solar panels currently is around 20% efficiency, but let's say there is 5 hours of sunshine a day, so 1% of landmass can still produce around 5000TWh a day.

But to sustain the current 25000TWh consumption, 5% of landmass is needed for PV on a sunny day, let alone winter and cloudy days.

Last edited by namelessman; 06-21-2019 at 01:29 PM.
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  #11  
Old 06-21-2019, 02:00 PM
ard ard is offline
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My only point is that this becomes a limit when you say "solar must provide all".

It doesnt.

Now, if we could place arrays in orbit- provide shading agaisnt solar heat gain AND beam energy down and around the planet...THEN you have something.

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Alignment here: The Definitive Alignment Thread

OE is Original Equipment aka 'BMW Original Parts' aka 'What you buy at the BMW dealer with a BMW label'

OEM is Original Equipment Manufacturer... EITHER the company that made the OE part or.... A part this is identical to the OE part, but is sold by the OEM under their own label


OEM is not what BMW sells


http://www.bimmerzone.com/category/T...ricks_OEM.html

https://www.turnermotorsport.com/t-OEvsOEM
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