Solar

You are likely? aware that in your car, your altenator charges your battery through a voltage regulator to keep from frying your battery...
A home, boat, RV solar system works the same way... Most usually 12 volts... In boats, there is also wiring from the battery to a fuse box simular in concept to what you have for AC at home... from the fuse box, power goes out to each light, horn, radio, you have...
In my case, I have about 12 square feet of solar pannels which allow me to set up a 6 amp battery charging system ... This runs a light in every room... I can also charge up a cell phone or computer tablet... or run a very small TV... before the digital TV nonsence, I had a CRT tv-radio I used for ten years while I lived on my boat anchored out in San Diego bay... Then the rich people did not want us there, so we lost everything... but thats another story...
Any yacht supply place has the voltage regulators for small solar systems... which come with instructions... unlike AC,, the DC systems are absolutely safe, easy to work with...

solar voltage regulators
https://www.defender.com/category.js...-1|328|2290044

simple installation
https://www.youtube.com/watch?v=-977HXn45zg

in several states it's illegal to have a battery bank inside your house because of fire regulations...same for a wood furnace... thing is, you have two solar panels on top of a shed close behind the house along with your battery bank, & regulator...you then run your power cable underground under your house and it comes up through the floor into one or more of your closets / cubbords... The 12 volt outlet is mounted on the outside of your closet...A lamp with a 12 volt bulb is plugged into that outlet... a phone or tablet charger as well... so no cutting up your walls!!!
lots of people have wood burning furnaces in a shed behind their house with the heat piped into the house... see the Mother Earth news magazine!!! And yes, severe cold in the South is likely to continue into the Tribulation period...
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OK  There are the positive and negative cables from my patio roof solar panels coming through the wall of my mobile home  above the battery regulator panel. 
These cables attach to the two aluminum strips on the right side of the pannel.. the  pos and neg attach to the power regulator as in the instructions... The black power charging cord goes down through the floor under my trailer, then 20 feet to my battery under my back steps... note 5 amp fuses in the lines...
you see a 110 volt outlet carrying 12 volts that I plug my table lamp with a 12 volt  bulb into
If I was fussy, I could have placed a cabinet in front of the power regulator box and cables... but no one will care here!!!
The Bottom picture, you see two outlets on the wall of my bedroom... the right outlet is 110 volt AC ... the left outlet is  12 volt DC which has the 12 volt lamp at the top of the picture plugged into it...
On the other side of this wall is my water heater closet with no floor beneith it...so both power cables come up from beneath the trailer at that point... the cables for the 12 volt outlet come directly from the battery with a 5 amp in line fuse...  The AC comes from the circuit breaker box on the other side of my trailer whose cover opens into my bedroom...
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