Learn how to charge any 12 volt battery using the power from the sun!
<p>i have a school project to design a solar powered public bike rack/shelter. i want to be able to charge 12 electric bikes. what kind of solar panels would i need and how many. what type of inverter/transformer will i need and what kind of battery will i have to use? </p>
<p>Actually we can recondition battery like this - <a href="http://batteryrecover.com" rel="nofollow">very good guide</a></p>
<p>I have a 150 ah lead crystal Betta battery that I need to charge using solar panels.</p><p>I am taking approximately 35 ah's out of the battery over a 14 hour period by way of a small fridge- freezer that runs off 12 volts. The fridge runs 24/7 so I am assuming the panels will cater for the charge rate and draw while the sun is at its best (08h00 - 17h00)</p><p>The area is close to Botswana so sunlight hours are good.</p><p>How many 250 watt panels do I need and what regulator is needed to ensure the battery stays fully charged.</p><p>Thanks</p>
<p>i have a model boat that runs on 2x 6v 4ah batteries, what size solar panel would i need to charge them both together in appox 4-6 hours ? </p>
<p>im doing a mini project and i want to know how much voltage is required to power a arduino and with a wifi shield and a PIR sensor with the help of solar panels and i want to charge a battery with that solar panels and i want to know what size of solar panel s required and how much voltage is required</p>
I have a trailer and a generator which charges my batteries. i have 2 rv batteries which are connected to 2 40watt solar panels and a regulator. Can I run my generator when my panels are charging or do I have to disconnect my solar panels when my generator is charging my batteries? Any input would be helpful
<p>Can I use a 18 volt, 5 watt solar battery charge maintainer to keep my truck battery from losing its charge during the winter safely?</p><p>mymaggiemay@comcast.net</p><p>Specification:<br>* Solar Panel: Mono-crystalline silicon 18V5W <br>* No-load voltage: 18-23VDC <br>* Load voltage: 18V <br>* Output current: 250-280mAh(0.2A-0.28A) </p>
How much battery in volt amperes hours by solar panels for computer using
<p>13.5 volts not OK. In order to properly charge a car battery, for example, the charging voltage needs to more than this intrinsic voltage of the battery. A car's charge voltage from the generator is 16 - 18 volts which provided electron flow back into the battery. If the rated output of this solar panel is 12 or 13.5 volts, that won't do it.</p>
<p>Big Mike,</p><p>As a handyman mechanic, I have been working with car batteries and alternators for about 20 years. Also during the last 8 years, I have been installing solar power systems in houses-4 so far. So, in my experience, I have found that car batteries, and deep cycle lead acid batteries can definitely be charged on 13.2 volts and in fact I am doing one right now off a Hard Drive 12 V power pack, putting out 0.2 Amps into my 50 AmpHour battery for my boat. It has been in trickle charge state for 36 hours and is now up to 13.7 volts, having started at 12.4 volts(which means it is only 50% full). When it gets to 14 V, I will turn it off and let it sit for 3 hours and check the voltage. I would like a resting voltage of 12.75 if possible. Batteries in reasonable condition can sit on 13.2 whilst charging at low amps indefinitely, all winter if you want. The problem comes if your charger has no regulation and takes the battery to 14.5 volts and leaves it there. Generally car alternators charge a battery at 14.5 volts and should also drop back to lower voltage after a time (depending on the car, it may only take 15 mins for the alternator to restore full charge after starting). Another feature of batteries, is the Equalising charge which a solar panel array will have built into it in the charge controller. So once a month, the controller will allow the battery pack to be slightly over charged, depending on the type of battery and the charging algorithm. Mine used 15.5 volts for 6 hours, only once a month, and this is intended to stir the electrolyte and reduce sulphation, the big battery killer. As far as I know, car charging doesn't do this. Anything over this is NOT GOOD for starting batteries, not even for fast charging. It is likely to heat the battery, bubble off electrolyte and buckle the plates. Good luck with yours, Roger Levy</p>
<p>I meant it says 12 volt setups and want to know if will work on 24 volt setups</p>
<p>I have a 20 watt panel I believe puts out 1.8 amps. and a controller. can I hook this up to a 24v trolling motor while in dock and get a charge and would I hook up neg post on one positive on other. Some else said this panel and controller would work but it says for 24 volt setups.</p>
<p>Hi,</p><p>I have gone through your blog &quot;How to charge a 12 volt battery using Solar Power&quot; this is such a good topic. I really enjoyed a lot and the blog is really very interesting.</p><p>&lt;a href=&quot;http://www.electricalgeneratorsltd.com/&quot;&gt;Diesel Generators&lt;/a&gt;</p>
I use four of these panels in series.Direct sunlight they produce 85 volts into a pair of <br>6v / 4.5 ah batteries in series.The transmitter uses 6v off one of them. <br>http://i430.photobucket.com/albums/qq22/N2NXZ/Solar%20beacon/IMG_8320_zps560f4e4a.jpg <br>The single lone panel keeps charge to a single 12v / 4ah battery. <br>http://i430.photobucket.com/albums/qq22/N2NXZ/Solar%20beacon/IMG_8318_zps023c0e6b.jpg
can you send detail product to my email hisamks@yahoo.com.my. i would like to buy.
The title should be changed it's confusing and going by the comments I'm not alone, this tutorial is about trickle charging a 12V battery. <br> <br> The title, to me anyway, appears to indicate this is a tutorial on how to charge a 12V battery using a solar panel.
The point is any storage battery (accumulator if you are English) slowly goes dead. With a 12V (okay 13.8V+) solar pannel attached across the terminals even 25 mA for 8 hours a day cancels out the slow discharge and maybe even adds a little charge. <br> <br>Ask your local VW dealer if he has a few small pannels that he would sell you.
Thanks for the video.... it is really nice<br> Here you to use a 3-6 volt solar panel if you want to charge a 12 volt battery<br> you can make it own<br> here is a&nbsp;<a href="http://topdiysolarpanels.com/" rel="nofollow"><strong>DIY Solar Panels Blog</strong></a> where you can know everything how to make it own.&nbsp;
Using a 1.5 watt solar panel does one have to worry about over charging a 12 v motorcycle battery without a charger controller? Any info would be most welcome.
I've used these (or similar) on several Ford 550s which were parked for several months at a time. We usually had to buy at least one battery but these ended that problem. For $9 on sale I certainly can't complain.<br> <br> one thing to note. They come with a cigarette plug but use the alligator clips. Found out that some vehicles disconnect the cig outlet from the battery when the engine is shut off.
I have an old lawn tractor that doesn't get used on a regular basis, the battery would always be dead when we went to use it. This is hard on the battery and we would have to replace it twice a year. Permanently mounted a solar panel on the hood (about double the size of this one) and we always park it in a sunny spot, now the battery is always fully charged and ready to go and the batteries last for years!
<p>seconding what the other commenter said:&nbsp; this is a fine tutorial showig how a 12v battery can be boosted, but that or any&nbsp;tiny solar panel is only going to generate 250 ma or so in full sunlight .&nbsp; If you're charging a smallish 12v battery that is 25 ah (=25000ma).&nbsp; Even assuming all of the charge was retained by the battery (usually you need to put an extra 10 -20% in) you're talking 100 hours in the sun.&nbsp; Yes it could trickle/keep topped up, which is a great use for it - but not a normal charge from 'used last week' to 'I want to use it next week'.</p>
It is simply not meant for that, thats why they invented a thing called a &quot;line powered battery charger&quot; to charge your batteries fast but this is meant to stop sulfation happening which can avoid a costly battery replace...
can you start an engine that has spark plugs ran by a magneto and a 12volt starter with a 12volt solar charger.
No - this solar charger is solely used as trickle-charge device to try and keep the battery maintained. As the other posters have stated, this is not the solution to use for a completely Dead Battery, and this power source also does not have the proper amperage to Start a cold engine. You need the cranking amps from a battery to turn over an engine. Solar power is good for maintaining and keeping batteries charged. I now use them in my home as well, and you still need an AC converter to convert he DC power into the proper amperage for a lot of other motors.
um... 5 watts for an hour isn't quite enough to charge a battery... especially a fairly large one like that I have a 6 volt flashlight battery that I charge with my solar panel and it takes ... oh, I don't know... like 2-3 days for full charge... an hour is not enough... Not to mention that the amp meter has to be connected in SERIES in order to even read... There are many flaws in this video. Fail.
First of all, I appreciate your comments - however, I would appreciate it if you actually went out and purchased the product I showed, then try it. It takes literally an hour to charge up the battery enough to use it - additionally, I am showing a battery maintainer and showing how to charge a battery that has been used - not dead. You are correct about the amp meter - that is on my tractor - when I turn the key, it reads - so you are correct on one item. I also use this item on my car and boat and it works great! Thanks for your comment, and be my guest to try the item I showed you - you will be surprised how well they charge batteries. If trying to charge a dead battery, it takes a lot longer.
I think the key here is that a full charge is NOT needed to be enough to get one start out of a battery.&nbsp; After that, the alternator of the vehicle (or in this case, lawn tractor) should start recharging the battery.<br /> <br /> Although IMO, a proper line-powered charger is the best bet in the &quot;dead battery&quot; situation, but a low-wattage solar panel is GREAT for keeping a rarely used lead-acid &quot;float charged&quot; so you're never in that situation in the first place.&nbsp; Otherwise self-discharge -&gt; sulfation -&gt; severely reduced battery life.<br /> <br /> I use a 5W panel in my convertible which is pretty rarely driven, esp. in winter - I haven't had a single problem starting it in the 2 years since I started using the panel.<br />
Yeah, right. You are just trying to sell a product that isn't even that great. And just so you know I have a 10 Watt solar panel running batteries in my house. I know what I'm talking about. Now, I'm not saying your product DOESN'T work, I'm simpily stating that you used FALSE information to try and sell it.
Thanks again for your comments. Solar power is a great resource, and I am glad to see that you are also using it. I have a 250 watt system on my home, and it is great. Thanks again for the comments, and I enjoyed your write up on the solat altoid tin.
Thanks for the video--i really need visuals to understand things as i'm kinda new to the solar power. :)

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