Now, let the tech mature for a reasonable longish term energy storage and I’ll set one up in the backyard :-) Save excess energy from the Summer, use it in Winter, repeat.
I don’t have enough space for the amount of LFP batteries I’d need for such seasonal storage. Even flow batteries of today needs more space than I have. So, it will have to be some $future tech that could allow me to save the summer for the Winter.
Several devices that took EUV machines(that cost hundreds of millions each) to etch login onto themselves - microchips on my laptop, phone etc.
A pipe constantly supplying flammable gas that was probably mined thousands of kilometers away just so that I can burn it and heat up my water for shower.
A very dangerous to the environment - refrigerant in both my fridge and heat pump.
A tank full of dinosaur juice in my car, which itself was machined and built with some exotic metals mined somewhere else in the world.
What difference is a few more kilograms of futuristic substance that can save energy for my house make?
I know hundreds or thousands of kilograms of LFP batteries in my backyard in feasible today. But who knows. Maybe we will find a way to mine Lithium or replace it with Sodium and the whole process would become “normal” like the metals in my 3 ton car.
You missed the largest reason home solar can be competetive and that is taxes. 11 cents per kWh and 3 cents sustainability charge and then 21% VAT over the cost price + taxes. And then the government mandates the energy companies have to buy your energy for the same price they sell you energy.
So as with many thing here it only makes sense because the government has completely distorted the market.