The most interesting part about Germany's Solar deployment is that they have almost no utility scale deployments. Almost every deployed panel is on the roof of a building of a privately owned residence or business.
Probably has to do with the form Germany's subsidies takes.
we'd have more power than we could ever use. Germany is proof of that.
Yeah, like we'd ever use more than 640k of memory... If the power is there we'll use it. To make aluminum, power our new EVs, etc...
Still, we have a pretty good example in Hawaii. Due to most of their electricity being oil generated and predominately sunny(but not too hot) weather relatively close to the equator they've actually managed to get to the point where they could have a day where they bust 100% at this point. It's reached the point that you need permission from the electricity company to get a hookup.
Still, let's do some figuring. Leaving Business and Industrial customers out of it for now.
The average US household uses 10,837 kWh a year, or 903 kWh/month.
A 300 watt solar panel takes up about 21 square feet and costs $263, though final install cost will be $1.50-$2/watt.
Each panel can be expected to produce about 789 kWh/year, ideally placed. Competing against 10 cent electricity, payoff would be about 8 years. Note: I'm using average cases here. I almost bought solar panels for my house, given that I have a nice south-facing roof. On the other hand, I live in Alaska. Even with our relatively expensive electricity I couldn't make it make sense due to substantially LOWER power production than I'm figuring and higher costs(even doing most of the work myself).
Anyways, getting back on topic, that means that each homeowner would need to install 14 panels, on average, to cover their energy needs, assuming they have a retired Model-S battery or something to provide stability.
Some interesting calculations I've made in the past:
- A retired Tesla Model S battery with 70% capacity remaining repurposed as a giant UPS will provide the average household 2 days worth of electricity
- The average household would use ~50% more electricity if they replaced their vehicles with EVs(note: 2 days of electricity in an outage from your old battery doesn't include charging your current EV)
- Start busting 20% of your total energy(and Germany is only at 5%) from solar power and it makes more sense to charge EVs during the day
- It would take approximately 200 1GW nuclear plants to make the USA carbon neutral for electricity. Again, lots of batteries would be handy...