Investing in hard assets to offset inflation and devaluation, avoid taxes, and protect against energy interruptions and hikes

We took a chunk of our retirement portfolio and cashed it in to buy as large a solar array as we could, heat pumps for everything, a battery, and a plug-in hybrid. Our reasoning was that 1. Hard assets are safe from inflation. 2. The energy bill savings are better than a good safe return on that money. 3. Saving money is untaxed, income is taxed. 4. We will have long-term security by buying twenty years of energy now at today's prices. 5. Self-generated power is uninterrupted by local, regional or world events. 6. World events only reinforce the need for secure energy. 7. Rate hikes just make the investment that much more profitable. Market correction? We've protected a chunk of our savings. Supply interruptions? We are safe. And our kids are delighted at the 4000 tons of CO2 we will not be producing. Edit- I am not going to fight here; take this or leave it. No one seems to be arguing the fact that not having any fuel bills for 20 years could be worth it. So- * The initial investment is $70,000. * The market is in correction, so a win cashing that out already. * We used 800 gallons of oil. Oil is $5 a gallon now, and probably never going to see $4 for a long time. That's $4000 savings this year and probably every year unless you think oil is coming down in price after this war. $4000/$70,000 = 05.71 return * We will have no electric bill. We used about 9000 kWh per year before heat pumps, and 16000 now. The current rate is $.26/kWh. 9000x$.26= $2360. 2360/70000 = 7.957 return. * So- 5.71+7.957= 13.7% return. * Another way, assuming no rate increase or inflation for 20 years, a yearly savings of $2360+$4000=$6,360.00; Multiply that by 20 and the out-of-pocket savings is 127,200, and does anyone want to contend there will be no price hikes?