Eli5: Call company that installs solar panels. Give them a bunch of money (thousands to tens of thousands depending). Wait 20 years to get that money back on the lower energy bill. Replace the whole system because it is obsolete. Rince repeat.
For real totally disconnecting from the power grid is a bad idea. That means you need a lot more equipment and battery storage. This increases the investment significantly, without much upside. It also prevents you from selling the power you generate but don’t need back to the power company (but depending on where you live this might not be a thing due to overproduction).
Also depending on you latitude and local climate it may be nearly impossible to go fully off grid without a huge system. Where I live we have about 6 weeks of very little to no sun (low sun combined with a lot of clouds and snow). That means all the power you need during that time needs to be collected previously and stored. This during a time it’s cold af so the power usage is high (using heat pumps for warming the house, which is very efficient). This means a lot of batteries and a lot of solar panels, just to get through these 6 weeks. It could easily triple the costs or more, even if you have the room for it to begin with.
I would analyse the power usage and see where you can save money on. 300 per month seems very high. Where I live energy is much more expensive than in the US and my bill is closer to 100 per month.
Just call a company, have some panels installed for say 2500-5000 bucks depending on how much room you have on the roof and if you need upgrades to your power system. This will save you at least 50 per month on the bill. But be aware the ROI will be on the order of 10-15 years at least and more if you are unlucky. Saving energy is free and means money in your pocket right away.
The word die can mean end of life, but has an alternative regular meaning: stopped working.
We use it all the time, for example “I don’t know what happened, I was driving along and the engine just died.” “Due to bad weather my power died.” “I wanted to game, but my controller died.”
Words can have different meaning and the verb die has a lot of meanings. And there is also a noun die, which is also in common use.
died; dying ˈdī-iŋ
intransitive verb
1: to pass from physical life : EXPIRE died at the age of 56 die young died from his injuries a dying tree
2a: to pass out of existence : CEASE their anger died at these words
2b: to disappear or subside gradually often used with away, down, or out the storm died down
3a: SINK, LANGUISH dying from fatigue
3b: to long keenly or desperately dying to go
3c: to be overwhelmed by emotion die of embarrassment
4a: to cease functioning : STOP the motor died
4b: to end in failure the bill died in committee
5: to become indifferent die to worldly things