I would like to get into solar power, more or less as an educational project.
I thought it would be great to set up a solar panel and recharge my tool batteries for "free." However, when I looked into the least expensive solar kit from Harbor Freight, it was about $150 for the setup. Looking into the numbers, I discovered that it cost me about 1-2 cents to recharge each of my tool batteries using grid power. That comes out to 7500 recharged batteries at the high end to make up that initial $150.00 investment.
Considering I recharge maybe 10 batteries per month on average, that comes out to a payback period of 62.5 years!
So, I did not buy the solar kit I was looking at just for its limited use of recharging tool batteries. Obviously, if a person lived off grid, you would have many uses for solar power and that would make solar a more viable option.
A few months ago, I watched a YouTube video where some guy was advocating most people would be better off with grid power, backed up by a battery bank power station and a gas/diesel generator in case the grid power goes down. In his example, his battery banks would keep his house running for about 3 days off grid. If grid power was still out at that time, he would run his generator for a few hours every day to recharge the battery bank. For his needs, he looked at spending about $70,000 for a whole house solar setup, or about $2,000 for a battery bank and generator setup.
For him, it made much more sense to go the battery bank and generator route. He was advocating that a battery bank backup system was a better economical solution for most people who have access to grid power. After all, if you have grid power, the chances of not having power for more than a day or two is pretty low. If you lived in hurricane zones, and maybe had to go a week or longer without grid power, the generator and a tank of diesel would last a long time.
My idea would be to have some kind of a portable battery bank that was plugged into my car's 12v outlet and recharging all the time while I'm driving. If the house lost grid power, I could just unplug the battery bank from the car and hook it up to my house power box.
At any rate, cooking chicken and veggies from a solar panel is pretty cool. Way to go!
I put 6 540w panels, 12 2v/720 ah batteries and 6 kw inverter for around 6500 eur which is $ 7150. I have a diesel 6 kw generator. my friends connected them for free. I don't use generator any more as it takes about 1 hour to fully charge batteries with solar panels.
I am 100% off grid. with electricity bills here and money they asked to bring the line to my house my payback is just 1 year.
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