Any techies want to chime in on Elon Musk's new PowerWall.
Here's some specs, obviously it won't fit into some existing battery compartments, but that is not an insurmountable obstacle. No word on the weight of the battery. I don't know how that would all convert to amp-hours for RV use.
Energy: 7kWh or 10kWh
Continuous Power: 2kW
Peak Power: 3kW Round Trip Efficiency: >92% Operating Temperature Range: -20C (-4F) to 43C (110F) Warranty: 10 years Dimensions: H: 1300mm W: 860mm D:180mm (52"x34"x7")
-- Edited by biggaRView on Tuesday 5th of May 2015 03:42:49 PM
bjoyce said
09:16 AM May 1, 2015
7kWh is 7000 watt-hours, so it would be 7000/12 (volts) or 583 amp-hours.
MarkS said
09:48 AM May 1, 2015
The website claims 350 to 450 volts. That puts capacity in a whole other universe. 7kwh at 350 volts?
they are 51" tall and 7" thick. I wonder if they can be disassembled and reassembled in different more RV friendly dimensions. I imagine so.
http://youtu.be/yKORsrlN-2k
-- Edited by MarkS on Friday 1st of May 2015 10:02:34 AM
-- Edited by MarkS on Friday 1st of May 2015 10:56:58 AM
I wonder if 5 or 6 of them lined up like books in the engine bay in place of the diesel would be enough power to move the coach any practical distance?
-- Edited by biggaRView on Friday 1st of May 2015 10:59:00 AM
Bill and Jodee said
12:15 PM May 2, 2015
At 4 ft x 3 ft and the requirement to be upright they don't seem like an option YET. Still, I don't think it will be long before the car battery and the house battery have a baby known as the RV battery. That's a delivery date we can all look forward to!!!
Jodee
Selah said
11:42 AM May 5, 2015
Some more math on BJoyce post. Lithium ion batteries can be discharged safely to 20% where current lead-acid batteries can only be discharged to 50%. The Tesla Powerwallcan effectively produce 466.4 amp-hours (583x.8) To achieve that same output you would need 932.8 amp-hour (gross) of lead-acid batteries or a little over 8 T105 batteries. Of course with a ten year life that's double that of a lead-acid battery. I am also ignoring any increase in efficiency that may be afforded to the Powerwall.
-- Edited by Selah on Tuesday 5th of May 2015 01:43:18 PM
bjoyce said
02:09 PM May 5, 2015
Selah: I was assuming the 7kW was the usable capacity, or 80% of the battery capacity. I run Lithiums in my RV.
Any techies want to chime in on Elon Musk's new PowerWall.
Here's some specs, obviously it won't fit into some existing battery compartments, but that is not an insurmountable obstacle. No word on the weight of the battery. I don't know how that would all convert to amp-hours for RV use.
Energy: 7kWh or 10kWh
Continuous Power: 2kW
Peak Power: 3kW
Round Trip Efficiency: >92%
Operating Temperature Range: -20C (-4F) to 43C (110F)
Warranty: 10 years
Dimensions: H: 1300mm W: 860mm D:180mm (52"x34"x7")
-- Edited by biggaRView on Tuesday 5th of May 2015 03:42:49 PM
The website claims 350 to 450 volts. That puts capacity in a whole other universe. 7kwh at 350 volts?
they are 51" tall and 7" thick. I wonder if they can be disassembled and reassembled in different more RV friendly dimensions. I imagine so.
http://youtu.be/yKORsrlN-2k
-- Edited by MarkS on Friday 1st of May 2015 10:02:34 AM
-- Edited by MarkS on Friday 1st of May 2015 10:56:58 AM
I wonder if 5 or 6 of them lined up like books in the engine bay in place of the diesel would be enough power to move the coach any practical distance?
-- Edited by biggaRView on Friday 1st of May 2015 10:59:00 AM
Jodee
Some more math on BJoyce post.
Lithium ion batteries can be discharged safely to 20% where current lead-acid batteries can only be discharged to 50%. The Tesla Powerwallcan effectively produce 466.4 amp-hours (583x.8) To achieve that same output you would need 932.8 amp-hour (gross) of lead-acid batteries or a little over 8 T105 batteries.
Of course with a ten year life that's double that of a lead-acid battery. I am also ignoring any increase in efficiency that may be afforded to the Powerwall.
-- Edited by Selah on Tuesday 5th of May 2015 01:43:18 PM