I'm honestly tired about PR positions written or referring some beancounters ideas of the world, regularly completely detached from the real world.

Personally, smelling rodent early enough I've built a new home, airtight as needed/possible, well insulated, with a (still rare these days) heat-pump VMC, other heat-pumps for heating (water-water) and hot sanitary water (air-water), a small p.v. plant with lithium storage enough to being fully autonomous when heating is not needed and partially autonomous in winters months: the result is simple autonomy is not achievable, nor real economy to pay back the huge investment.

I mean, I do not invest to earn in money but to guarantee comfort of life in "bad water" expecting unreliability and high services prices, but in monetary terms it's a TOTAL FAIL. Heat pumps can potentially last around 10 years, lithium battery being used very little (daily 15% authorized DOD + eventual blackouts) perhaps the same. Inverters probably can last more, so solar panels, but they'll probably be not much interesting to keep after that amount of time. Long story short ~60k€ for just 10 years of usage. Even with ARTIFICIALLY skyrocketed prices (which is a crime against humanity than in Democracy demand justice, like life-long sentences, outside Democracy demand simple brutal revenge) economically is a total fail.

If I add a BEV to the mix is even worse: so far NOTHING is really designed to work on p.v. so even being a WFH worker, so able to recharge a car at home when the Sun shine witch might be most of the time, NO DAMN VEHICLE on sale offer a standard data port to talk to a p.v. invert and get ONLY available power from the Sun like stationary BMS/batteries do (so something we already have at commercial level of evolution), equally almost no vehicle can act as a battery to the home, very few offer a 240V AC inverter with 3kW maximum but NOTHING really integrated nor integrable. Similarly the same happen for hot water where only few systems offer modbus PARTIAL control of the system from a central energy management device witch is normally something home-made since on sale there is again essentially ZERO to really try the self-consumption route. Why such route? Because is the only meaningful choice technically speaking.

Yes, you are reading correctly: keeping a national grid stable with big p.v. plants it's simply IMPOSSIBLE until we get superconductive global grid (and I'm not sure if it's possible in that case either). AC national grids are designed to sustain a slowly changing mean load, when the load change fast controlling the grid frequency is a nightmare. That's why the big push to BEV dreaming an surrealist scenario of soooo many connected batteries on wheel that keep regulating the network frequency or offload such tremendous costs to individuals.

Those who really think we can run NOW/in a decade the world on renewable can be classified in two categories: dreamers completely outside the real world, not much different than children dreaming Star Trek or CRIMINALS who try a hyper-big scam fully know the outcome. You do not have to believe but to know, so since we are on HN just try to design/outline such renewable economy being honest.