It would really help in cases like this to post exactly what device it is. This matters a lot for steps on how to best tackle the repair. Ovens are usually pretty similar, but the devil is in the details as usual, so we need to know as much as possible.

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 Replace the whole system because it is obsolete.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.

All the species dying due to the Oxygen Catastrophe: “I’m gonna be honest with you, it’s not great”.

People might not know, but Chernobyl was never actually shutdown. The reactor that blew up was obviously shutdown, but the entire plant kept operating for decades after the disaster.

These kinds of products are always scams.

All dehumidifiers and airconditioners can pull water out of the air when the air is very humid. This water isn’t very clean whilst in the air, as there is a lot of airborne pollution and bacteria in there. But with some simple treatment and filtering you could drink it. However the tray where the water collects is super dirty, it’s always moist and collects all the nasties in the air and the water. Those places are breeding grounds for all kinds of bacteria and if it doesn’t drain properly it’s a real health risk. Legionnaires disease was named after some old folk got sick due to a faulty aircon system. So getting water from the air is one thing, cleaning that water is a whole other ballgame.

Keeping devices like this clean is a hassle and usually requires a lot more water than it ever produces, not to mention the cleaner (usually some chlorine based thing) that goes down the drain and pollutes the planet. And if you don’t keep it clean, you have a major health risk. Often there are parts that are hard to get to, but get dirty anyways and are a pain to get to and clean properly. Especially since they need max surface area for the thing to work, but that means a lot of surface area to clean. And when that surface area is crammed into a small device, that means poor access.

Then there’s the simple fact it costs a LOT of energy to pull the water from the air and then more energy to clean that. It’s much easier to simply collect dirty water (for example ground water, surface water or even collected rainwater) and clean that water. This is just as easy to do as with the water pulled from the air, but without expending a lot of energy to collect the water. With a proper setup you can even put in salty sea water and get out clean drinking water. This works so well, most smaller islands get their drinking water from these kinds of setups that simply filter seawater (usually some kind of reverse osmosis setup is used).

The next issue is that these tiny devices are usually very inefficient due to their small surface area, where a large aircon system can pull out a lot of water with relative ease, these smaller devices can’t. And if you already have the aircon running, these devices can’t really compete and simply produce nothing at all. But let’s say you have a pretty humid home and don’t run an aircon or dehumidifier. Then the thing uses up a lot of energy, but pulls that water out of the air. But then what? Now the air is dry, so it’ll pull less and less water out of the air.

Then there’s the cost. As said these things use a lot of energy and you still need to clean the water after. This means the price per liter can be much higher than even bottled water. If the water you get from the centralized system in your area isn’t clean enough, consider a setup to clean that, it will still be cheaper than the water this thing gets. Even in places where there isn’t any water nearby and a central system isn’t available, it’s cheaper to ship the water by truck (either in large containers like a 1000L IBC, or with a tanker truck). This costs a lot of money, but is still cheaper than getting it from the air.

These kinds of devices have been around for decades and never work. It’s a dumb concept to begin with and often the marketing is even dumber.

Bonus dumb points for marketing these things for arid poor areas for people who don’t have any water. Those people don’t have the money to buy them, don’t have the money to run or maintain them. And they don’t even work in arid areas anyways, since there is no moisture in the air to pull out. And just a friendly reminder, the only reason those people don’t have water is because they are poor. Because they are poor, they can’t buy water, and since this world runs on capitalism: If there is no buyer there is no product.

Simpsons did it!