Your Questions About Solar Powered Fan

Betty asks…

Storing a motorcycle in a trailer – dampness / rust prevention.?

Hi. Ive recently purchased a box trailer to store my motorcycle as there are no garages where Im at. I'm storing other items in the trailer (golf clubs, tools etc) and I would like to prevent rust/dampness. Im currently in England and it has been wet recently. It is dry in there, but not completely air tight. There are small gaps at the rear door but water should stay out.

Can someone tell me the best way to prevent this? I cant provide power to the trailer so have been looking at solar powered vents / extractor fans? Many thanks for your suggestions.

ssadmin answers:

Solar powered extractor fans are probably your priority. You wouldn't believe the amount of condensation that can form in a steel shed – which is what it is…I bought a steel shed for my mountain bike (luckily, chain aside) nothing can rust on a mountain bike but anything rust-prone would have disappeared by now. Get a cold, humid night and it forms gallons of the stuff.

I fitted a large (200mm) computer case fan (I have power to it, luckily) and it cured the problem. Not got anywhere near your volume, though…

Still do what you can to prevent deterioration (waxes,oils etc) but keeping the air moving will be your bestest-ever friend.

Edit: typo

Lisa asks…

How can I make electric motor run from 2 sources of energy?

I want to build a fan that would work during the day off of solar panel and during night it would be powered by a rechargeable battery. I can build large enough solar panel that would be able to both charge the battery and run the fan (the electric motor) at the same time when the sun is out. At night (or anytime sun is not out), I want the motor to keep running using the battery.

What do I need and how can I connect those things together so that they work?

ssadmin answers:

If the solar panel is electrically connected to both the fan and the battery there is no problem. When the sun goes down the battery will automatically run the fan because its voltage will steadily override the reducing output from the panel until it takes over. Very similar to solar and terrestrial radiation

Donald asks…

solar panels and hurricanes?

I am looking to get some solar panels for my home to just power a few lights, a fan or two. I have a generator but I want that only to power the fridge and maybe some other small stuff for convenience.

But mainly want the solar panels for the lights and fans. Any one have an idea of how about I go to figuring this all out? Should I call a contractor or anything?
Thanks a lot this will help me a lot. I really only want the system for emergency power outage and hurricane season. Last hurricane season was out of power for about 3 weeks (hurricane Ike). No fun.

On average i use about 3 bulbs in my entire house out of the 12 I have. Mainly bedroom lights and kitchen lights. Things like fridge would be powered by my generator. I'm going to read more up on this but thanks a lot for the information it helps a lot with what I need to look for.

ssadmin answers:

Depends on what light bulbs you have in watts.depends on how many you want on. For the power equation you take P which equals watts x I which equals amps and E which equals volts and you multiply the amps and the volts together to get the watts which the solar panel is generating. For example if you had 7 60 watt light bulbs you would need 420 watts generated. Which if you got 50 watt panels each you would need 9 panels. And for what your talking about if you want the stuff to work when the power goes out you are going to need an inverter. Not to be confused with a grid ti inverter. And a few batteries i recommend deep cycle batteries that are meant for solar panels. Depends on what fan you have.

Nancy asks…

I need something to power two small fans outside.?

i currently have only three ideas, i have no idea if any will work so i would like input on the ideas and any other ideas you all might have.

1.) can i use a car battery?
2.) solar power?
3.) a big battery with outlets?

and if any of the above would work i would like to know where to get the supplies and how to set it up, thank you very much.

ssadmin answers:

Common household fans don't run very well off of the cheap modified sine wave inverters that are commonplace these days. Permanent solar installations use a far more complex design that produces a less distorted wave.

Consider using just a long medium duty extension cord instead.


Linda asks…

FIRESAFE BOX FOR SOLAR INVERTER for baseboard heaters.?

I am planning on making solar panels and a wind generator that will feed into a grid tie inverter. I live in Minnesota and currently have Minnesota valley electric. Now I have heard that you can use a grid tie inverter to pump power from solar and wind into the grid so I basically can run our 240v electric baseboard heaters. I was figuring a wooden box sprayed with heat based spray paint for like grills and then line the walls with plastic bags full of sand and a fan to allow cool air into the box as well as a small plexiglass window to see display. Any ideas or comments on this?

ssadmin answers:

Hold on a moment:

Assume you have a 20A @ 240V *small* baseboard heater. That comes to 4800 watts.

The very best solar panels these days make about 10 watts per square foot – coming to 480 square feet (10 x 5 for practical purposes).

The typical residential windmill makes anywhere from 500 to 4,800 watts, but usually at a much lower voltage than 240V.

Inverter losses will be at least 15% based on a 48VDC input. Less if higher, more if lower.

So, just to run a single electric baseboard heater, you will need either a much larger mill or quite a large solar array.

Now: to answer your question directly – most electric baseboard heaters are thermostatically limited to well below the ignition point of wood. And if you finish with heat-resistant paint and provide some ventilation you should be fine. But be sure to maintain the proper clearances as called for by the baseboard manufacturer.

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