How to connect solar panels to batteries?
I have two solar panels that were going to be trashed at work. I want to use them to charge batteries on my RV but i noticed they put out around 20 volts in direct sunlight. So i am wondering: -isn't this way too much voltage for a 12 volt system? -do a need some sort of a regulator connected to keep them from overcharging?
Asked By: - 7/4/2010
Best Answer - Chosen by Asker
20 volts is a common open-circuit voltage for nominal 12v panels. The panels put out about 15v at full load. If the panel puts out little enough that it takes 20 hours or more to put a full charge in the battery you can get by without a charge controller - just keep the cells topped up with distilled water. A charge... More
Answered By: virtualguy92107 - 7/4/2010
Additional Answers (2)
You can use them without the regulator . Just make sure you use blocking diodes so the the power does not flow back into the panels . You can get those at radio shack of some electronic store or off eBay for a few bucks .
Answered By: Dads boy - 7/4/2010
You want the panel that is charging the battery to be higher voltage than the battery. A fully charged 12V battery is over 14V. A 12V solar panel puts out between 17V - 20V, so that's a good size for your battery. They name them all 12V to help show what works together (like Garanimal clothes... More
Answered By: Amy - 7/6/2010
Over 483 Local Jobs Now Hiring In Your Area. $18-$87/Hr - Apply Today!
Click. Search. Apply. Free!
Earn residual on products and services customers uses daily at home.
Jobs hiring near your local area. Part-time, Full-time, Work at home.
Other Career Questions
What is your current job? Why did you choose this job? What do you enjoy about your job? What do you dislike about your job? What would be your perfect job? Would you rather have this j...
Where are the jobs? Is productivity and globalization creating a permanent “recession” of jobs? My main issue is I am doing a paper for school and have no idea where to begin. I was hoping suggestions...
Hi ok im 19 and about to start college to do an acess course into a university. Ive been browsing through all the courses and im tottaly stuck! I thought politics but im scared ill end up with some r...
Content is not owned or controlled by Monster. Any content concerns should be addressed with Yahoo!
Yahoo! Does not evaluate or guarantee the accuracy of any Yahoo! Answers content. Yahoo! Disclaimer.
Best-Paying Work-from-Home Jobs
It’s easier than ever to work from home. Of course, not every job is a mobile job, and some companies aren’t interested in having their employees work from home.
2013 Marketing Jobs Outlook
The US may be facing another year of anemic hiring overall, but that won't be the case in the high-orbit world of multichannel, digital media marketing.
2013 Engineering Jobs Outlook
Engineers will find job opportunities in select disciplines in 2013, with candidates who are all-around, client-oriented businesspeople in demand.
Best-Paying Jobs by Major
What could you earn with a particular four-year degree? Find out by checking out this list of the top-paying jobs for 20 of the most common majors.
Eight High-Paying, Secure Jobs
Want to earn a good salary and enjoy a measure of job security as well? Check out these well-paying jobs on tap for fast growth in the coming years.