Energy Options > Solar Power

Portable solar system to run electric fans

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Carl:
I use fans like the links below and they do move a good bit of air for 'personal' use as while in a chair or in bed on a hot,power-outage night and they run off most any 12 volt battery BUT use about 1 amp so you get about the same number of hours use as the rated amp hours of a good battery or jump pack....for TWO of this fan I would suggest an 18 AMP HOUR battery though better to use one fan per 18 Amp hours of battery to add longer life to the battery as flattening them each day is not so healthy for the chemistry. During a power outage I used a 12 amp hour sealed lead acid battery to run one fan all night and was comfortable with a recharge in the morning from my larger solar panels/battery set-up.

https://www.amazon.com/12v-Oscillating-Fan-Car-Universal/dp/B0719JVTW4/ref=sr_1_30?ie=UTF8&qid=1527954786&sr=8-30&keywords=12+volt+auto+fan

https://www.amazon.com/Zento-Deals-Portable-Oscillating-Fan-Universal/dp/B01HMV9CX0/ref=sr_1_11?ie=UTF8&qid=1527954644&sr=8-11&keywords=12+volt+auto+fan

https://www.amazon.com/Hopkins-SP570804-Go-Gear-Oscillating/dp/B003SS62PS/ref=sr_1_1?ie=UTF8&qid=1527954644&sr=8-1&keywords=12+volt+auto+fan

I don't know that one fan is better than the other and usually just buy the lower cost of these links as I usually keep a couple spares as I use some daily in my Ham shack for circulation.

kid_couteau:
Hi All

Surfvivor may I ask a personal question?

Do you have any electronics experience? Please forgive I do not mean that in a catty way but as an honest question. I ask because then we know where to start.

It is only my opinion and again please forgive my bluntness but it seems that in your posts you always tend towards the Goal Zero type equipment. From what I have read and what I have built it may be good stuff but you could build an equivalent setup yourself for a lot less.

From Carl's post: https://www.amazon.com/12v-Oscillating-Fan-Car-Universal/dp/B0719JVTW4/ref=sr_1_30?ie=UTF8&qid=1527954786&sr=8-30&keywords=12+volt+auto+fan

https://www.amazon.com/HQST-Monocrystalline-Connectors-Battery-Charging/dp/B018BMGTTO/ref=sr_1_5?ie=UTF8&qid=1527983429&sr=8-5&keywords=solar+panel+100watts

https://www.amazon.com/EDECOA-Inverter-Modified-Display-Remote/dp/B074VY2RGS/ref=sr_1_23?s=lawn-garden&ie=UTF8&qid=1527983504&sr=1-23&keywords=power+inverter+sine+wave

https://www.amazon.com/Universal-UB121000-45978-100AH-Cycle-Battery/dp/B00S1RT58C/ref=sr_1_3?s=electronics&ie=UTF8&qid=1527983590&sr=1-3&keywords=12+volt+sla+battery+100ah

Heck you dont even need the inverter if you just want 12 volt stuff

Just a thought
Kid Couteau

FreeLancer:
I got one of these Vornado Energy Smart fans last summer that has a high-efficiency brushless DC motor that runs off 24VDC transformer that plugs into the fan with a standard barrel connector.  It's expensive but it does move air well and can be dialed down to really low speeds to reduce noise and energy consumption.




Today I made up a DC power cord and played with running it off of 12V batteries and power supplies through a DC converter to measure the fan's current draw.  At full speed it pulled 2.2A x 24.0V ~ 53W from the converter, which corresponded to 4.2A x 13.8V ~ 58W from the power supply I was using.  At about 75% fan speed, which seems like the sweet spot in terms of noise and air flow, the fan pulled 1A x 24V = 24W.   I have the exact same design with the traditional AC motor and it pulls 72W from the wall socket at full speed, although the DC model feels like it may move a bit more air at top speed.


You could hook up two deep-cycle 12v batteries in series with a 24V solar charge controller and then run the fan directly off batteries with no conversion losses from a DC-AC inverter or a DC-DC converter. 

Carl:
Looks like a good fan choice though I would not run it on high for extended periods.

https://www.amazon.com/Ceiling-Battery-Power-ceiling-Portable/dp/B06XP58PSB/ref=sr_1_60?ie=UTF8&qid=1528200811&sr=8-60&keywords=12+volt

surfivor:

--- Quote from: kid_couteau on June 02, 2018, 05:54:19 PM ---Hi All

Surfvivor may I ask a personal question?

Do you have any electronics experience? Please forgive I do not mean that in a catty way but as an honest question. I ask because then we know where to start.

It is only my opinion and again please forgive my bluntness but it seems that in your posts you always tend towards the Goal Zero type equipment. From what I have read and what I have built it may be good stuff but you could build an equivalent setup yourself for a lot less.

From Carl's post: https://www.amazon.com/12v-Oscillating-Fan-Car-Universal/dp/B0719JVTW4/ref=sr_1_30?ie=UTF8&qid=1527954786&sr=8-30&keywords=12+volt+auto+fan

https://www.amazon.com/HQST-Monocrystalline-Connectors-Battery-Charging/dp/B018BMGTTO/ref=sr_1_5?ie=UTF8&qid=1527983429&sr=8-5&keywords=solar+panel+100watts

https://www.amazon.com/EDECOA-Inverter-Modified-Display-Remote/dp/B074VY2RGS/ref=sr_1_23?s=lawn-garden&ie=UTF8&qid=1527983504&sr=1-23&keywords=power+inverter+sine+wave

https://www.amazon.com/Universal-UB121000-45978-100AH-Cycle-Battery/dp/B00S1RT58C/ref=sr_1_3?s=electronics&ie=UTF8&qid=1527983590&sr=1-3&keywords=12+volt+sla+battery+100ah

Heck you dont even need the inverter if you just want 12 volt stuff

Just a thought
Kid Couteau

--- End quote ---

 Yes, I mentioned goal zero may be over priced but it is something I am familiar with. I didn't say I was buying that necessarily but using it as starting point for comparisons. I took a digital electronics course 30 years ago, but I don't remember much of it. It may seem like easy stuff to grasp but I have so many hobbies, friendships, things to do and research all the way from trying to do martial arts, gardening, practicing guitar, going out with friends, keeping up with old friends, going surfing, cleaning my house, working out, shopping, going camping, band practice, fixing my car, working, learning new stuff for my profession, canoeing, going to church or temple, finding time to meditate, I am always juggling something and have limited time to figure anything out.

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