Sorry for the industry jargon, but measuring things in kW won’t give you the full picture, you want to compare things in “kWh”. Your utility bill should show your price in $/kWh and the solar company should have given you a production estimate from Helioscope or some kind of similar energy estimating software that shows expected annual kWh output
Their pricing looks good, you’re getting black on black modules and optimizers for a bit over $2 per watt after incentives. As someone who works in the industry I’d say that’s a pretty decent price.
What have they promised for your annual production estimate? Also what’s your current cost of power?
I work for a private solar developer in NYS, and I can see that the state regulators are either asleep at the wheel or intentionally complacent with allowing private utilities to let our electric infrastructure rot so they can keep collecting profits off of ratepayers. We have some of the worst utilities in the country and state is currently suppressing a grassroots effort to oust RG&E, who is the worst of the worst. In general though their refusal to modernize their grid is grinding the goal of 70% renewable by 2030 to a quick halt.
I had really hoped that getting NYPA behind the building of renewables would make them a heavyweight that could take the utilities to task for their failures, it’s infuriating that they’ve fallen to more regulatory capture.
Most places where this can be done, it is already being done. The low hanging fruit for pumped hydro was all picked decades ago, and at great cost to the ecosystems it destroyed in the process - turns out that drowning thousands of acres in massive man-made lakes had a bit of an impact on the plants and animals that lived there.
Not saying that the benefits weren’t worth the cost, that’s a whole different debate. But there’s little to no opportunity to scale this energy storage tech beyond it’s current footprint.
As a professional engineer who literally designs solar power plants for a living, this is not how electricity works. It is true that solar inverters can throttle their output by operating at non-optimal voltages, but you can’t just dump power into the ground without causing major issues to the grid infrastructure.
As others have mentioned, you can invest in the stock market within your 401k, though your options can sometimes be limited or saddled with high fees depending on what broker the 401k is through.
If yours is through a shitty broker then you might be better served by opening an individual retirement account (IRA), likely a Roth IRA given the limited info you’ve shared. You can open one with a broker of your choice, so go with one of the better ones like vanguard or fidelity. Using tax advantaged retirement accounts will always beat saving your retirement money in a non-tax advantaged one, all else being equal.
Edit to echo the flowchart from one of the other comments: https://imgur.com/u0ocDRI
This is the core of sound personal finance strategy in purified form. Great resource!
Most European residential electric systems operate at 240v, versus 120v in the US, which means you can only backfeed a US outlet with half the power you could in a European outlet. That alone makes this system half as useful for US applications.