tailgater wrote:Devil's in the details, yet the only hard number you offer is the guess you made on the life of the battery. Which would be amazing if true.
I love me some off the grid stuff.
Solar and battery backup interest me greatly.
Not even Tesla, on the web link that you provided, are brave enough to offer actual numbers. Because here's the deal:
Solar power from one home wouldn't be enough to charge that powerwall battery pack in a day.
And if you do use the powerwall to charge your Tesla, it would usurp all the amps.
I don't doubt you could run an average home for some time. Be frugal. Don't use an electric oven or clothes dryer. Assume you don't have electric heat and won't use the AC.
It's all about amp draw.
And the Tesla powerwall might have changed names, but it hasn't changed technology over the past 5+ years. And the math simply doesn't add up.
Someday. Maybe.
We need a near perfect battery. Which will happen as soon as we approach near perfect super conductivity at temperatures a bit north of zero Kelvin.
Even liberals should recognize that mandates based on conjecture are bad laws.
Dude, 13.5 kWh for the battery is a pretty hard number. That would be 1,000 watts of power for 13.5 hours of use.
And a roof of solar panels can charge the battery in a day. Here is some math for you:
1 solar panel rated at 300 watts, for say 5 hours a day = 1.5 kWh. This is a 3'x5' panel.
So on a good day you would need 9 such panels at about 15 sq/ft each = 135 sq/ft of roof to fill a 13.5 kWh battery.
They sell complete "off the grid" kits - cause it works.
Your power bill can show you how many kilo Watts your home uses so you can get an idea of sizing a system.
More math; my car has an 82 kWh battery rated at 350 miles. That's .234 kwh/mile. Charging for 50 miles/day = 11.7 kWh.
So there is a big difference between "off the grid" and selling your excess power back to the grid, in terms of the system you might need.
I have no idea why you would think an ultra-high efficiency battery, super conducting or not, is needed to make this work.
What you really want is a "decent battery" and a 90% efficient solar cell (good luck with that).
Oh - Conservatives should know the difference between conjecture and doing the math.