Sign in to follow this  
Guest kevin

a question about solar panels

Recommended Posts

Guest kevin

i know very little about solar panels. my question is would a 45 watt panel be enough out put to charge 3 deep cell 12volt batteries to a full charge in 8 hours on a sunny day?

Share this post


Link to post
Share on other sites

kevin

 

the answer is no

 

here is a link

 

http://www.batterystuff.com/kb/frequently-asked-questions/solar-charging-faq/what-size-panel-do-i-need.html

 

here is another

 

http://www.batterystuff.com/kb/articles/solar-articles/solar-info.html

 

 

now the long answer It depends on how much stuff your planning on running and is it

120 volt or 12 volt is it energy efficient or standard even 12 volt {car bulbs}

can be LED so less power usage and there is line loss voltage lost due to how far your

sending your power 12 volt is less efficient.

 

I use mine for running 6 {12 volt camper style lights} and a couple of computer fans 5 inch

also can use a inverter to make 120 volt items but if your running things while

charging or are you charging to use at night if your going to power a ham radio

or a CB radio with a linear amplifier it is a game changer.

 

so there is no right answer as you need to know how long your going to power something

and if you leave it on and remember if a standard vehicle battery drops below a certain

level it may not come back {dead} so it also depends on your type BRAND I use OPTIMA

they are tough and last much longer and recharge many more times than others

the blue top probably best for your plan.

 

http://www.optimabatteries.com/optima_products/bluetop/index.php

 

people have no idea how much it takes to run a radio for a long period of time

and leaving it on listening or waiting for a broadcast takes some power and broadcasting

take much more.

 

you need a charge controller and a volt meter on the batteries as well as a secondary

recharging source a very small generator or a wind powered sail boat type generator .

most campers trailers need a 220 watt system and 4 batteries 2 and 2 isolated

 

its never easy is it, I hate that

 

just remember power is like water your storage is what you have and in solar how much

sun and panels need to be some what movable to track the sun or more panels to grab

enough as it is in alignment and still a battery will only accept so much charge at one time.

Share this post


Link to post
Share on other sites
Guest kevin

thanks snake, your knowledgeable as always. i have been looking and found a package deal of a 50 watt windmill with a 20 watt solar panel, as well as battery and 400 watt invertor ( i already have a 2000/4000) for around $600. if you don't mind i'll pick your brain a bit. the family group i'm with has 8 deep cell 12 volt and 6 reg car batteries. the main use of these would be for lighting at night or in our"bunker"( we don't have leds yet... but soon) with some 110 ac VERY occasionaly (sunday movie night lol). would the wind mill/solar panel set up be viable under this kind of usage..... i understand there are to many variables to be certain...and this would not be a necessity , only a comfort.

thanks matt i'll check it out.

Share this post


Link to post
Share on other sites
Guest kevin

no hadn't thought of it, but if it can handle the wind it sounds good to me.

Share this post


Link to post
Share on other sites

kevin

 

that actually sounds do able but I think you need at least a 100 watts worth of solar panels

 

you need some salvaged computer fans for comfort / ventilation a spray bottle of water and a little fan

 

helps also heat goes to the ceiling so this will keep the room temp even

 

look into these sites

 

http://store.sundancesolar.com/30-watt-wind-turbine.html

 

http://store.windenergy.com/Air-40-12V-Wind-Generator/dp/B005ENJC84

 

http://www.windenergy.com/products/whisper/whisper-500

 

http://www.discountpv.com/wind_turbines/air-lx-12.htm

Share this post


Link to post
Share on other sites
Guest kevin

thanks for the links. i'll take a look, raining like hell the next 3 days, maybe i can educate myself on solar a bit.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this