All renewable energy (RE) systems with batteries should include a charge controller. In this article we'll principally be referring to solar charge controllers . Charge controllers prevent battery overcharging and also prevent the batteries from sending their charge back through the system to the charging source (i.e., the solar panels). Think of a solar charge controller as a battery nurse—its job is to monitor the battery bank, feeding it what it needs and checking its vital signs. Since a solar controller does its work in line between the solar panel array and the batteries, it would make sense that its selection and sizing would be influenced by those components. And that's exactly the case.
Voltage and amperage (or current) are the parameters we use in solar charge controller sizing. The solar controller must be capable of accepting the voltage and current produced by the DC source (usually solar panels) and delivering the proper voltage and current to the batteries. This situation might make you think that the DC source, charge controller and batteries must all share a common voltage. While that is one system design strategy used in many installations, it's not the only one. More on the alternatives in another article. For now, it's one voltage for everyone!
Technically speaking, the DC source must always have a higher operating voltage than the battery bank in order for current to flow from one to the other. A handy way to remember this fact is the statement, "curent flows downhill." For the purpose of this discussion, we'll use nominal voltage which means common battery voltages. Nominal voltage in this sense is synonymous with battery voltage. Since batteries (where they are used) are in many ways the heart of an RE system, we can call the bank's voltage the system voltage. The system voltage selected for any given installation is usually, though not always, determined by the battery bank required by the application; the inverter, if one is used, will also influence the choice of system voltage.
Sizing comes down to this: there's the quick method, which will very likely give an acceptable, if perhaps oversized result, but won't describe the why here - we'll just show you the steps.
Short Method for Sizing Solar Charge Controllers
For PWM and PWM shunt solar controllers, select one that is rated at your system voltage (same nominal voltage all the way through the system).
Divide solar panel array total wattage by system voltage.
Add 20% as a safety margin (i.e., (result of Step 2) X 1.2).
Select a solar controller rated at or above the result of Step 3.
Example of the Short Method
Two 125W, 12V nominal modules. System is 250 W, 12 Volt nominal. Solar charge controller will be 12 Volts.
250 ÷ 12 = 20.83
20.83 * 1.2 = 24.996 amps
You could use a Xantrex C35, a 35 amp solar charge controller; or a Morningstar Prostar 30, a 30 amp solar charge controller , for example. Any 12 volt solar controller greater than 25 amps will work.
About the Author
Co-written by Ben Gorman and Sascha Deri.
Founded in 1999, altE, Inc has catered to DIY customers on every continent of the globe. A 2006 Inc. 500 awarded company, altE aims to continue to fulfill its motto, "Making Renewable Do-able," by offering cost competitive, high-quality solar and wind energy related products and educational services to a broad spectrum of the public. For more information visit their website at www.altEstore.com or contact Toll Free (877) 878-4060.
A solar panel is organized assembly of solar cells. It is also known as photovoltaic cells.
-Use of Solar Panel
The solar panel can be used as a larger photovoltaic system to generate and provide electricity in commercial and residential areas.
-How Solar Panels generate Energy?
Solar panels use light energy from the sun to generate electricity. A single solar panel can produce only a limited amount of power. The cells must be connected to each other and to the system. Cells must be sheltered from mechanical damage and moisture. Diodes are used to avoid reverse currents. Solar modules are produced from siliconPV cells.
-RV Solar Panels
RV (Recreational Vehicle) owners use RV Solar Panels. There are a range of RV solar panels to choose from. The small RV Solar Panels can help charge the smaller batteries around your RV. The bigger RV Solar Panels can power up your entire RV. You can power up TV, satellite connection, a microwave and other electronics items. RV Solar Panels are much lighter in weight and effective.
- RV Solar Kits
RV solar panels are available in DIY (do-it-yourself) kits. Kits include the following:
The actual solar panels
Mounting structures
Charge controller
Fuses
Output wires
Intermodal cables
-Installation of RV Solar Panels
Laying RV Solar Panels flat can cause a power fluctuation. It is advisable to lay RV Solar Panels at an angle on the top of RV. RV solar panels and their mounting racks should be installed on the roof. Wiring of the proper gauge should be run from the inverter to battery bank. You should connect the wires with the correct polarity. You should cover the face of the solar panel with paper or cardboard while installing it. The roof should be strong to support the array and the panels should be at least 8 inches away from the edge of the roof. You should be careful when drilling holes. You should take care that you are not drilling into any interior wiring. You should keep the panels covered until you are ready to store up energy.
-Advantages of RV Solar Panels
1. Keep the vehicle's battery charged by using RV solar panel kits.
2. It is eco friendly
3. It is reliable supply of energy.
4. It provides opportunity to travel in a relaxed and enjoyable pace anywhere.
5. It is easy to assemble.
6. It needs minimum maintenance.
7. You can use all of your electronics items while on the road.
About the Author
livecofriendly.com is a small business encouraging individuals to live a healthier life using RV Solar Panels
inverter Battery Is there a battery powered inverter that exists?
I'm looking for something like a regular car inverter for my AC appliances... a lamp, laptop, radio, etc...
But is there something like an inverter that can be plugged into the wall at night, charged up like a laptop battery, then removed and placed where you need it? Basically a battery powered inverter. Or if anyone knows how I could somehow hook up several laptop batteries to an inverter and make my own.
Thanks!
sure!
check out Sam's Club, Costco, WalMart, NAPA, AutoZone, Advanced Auto for a 12v battery "jumper kit".
Some come with a small 150w inverter. I bought mine at Sam's Club. It has a 12v 17AH Gel Cell inside, jumper cables, and an inverter.
You can put 12v batteries inside a 50cal ammo can with an inverter and have the same thing.
Solar Inverters are one of the latest and most energy saving power protection devices in the recent time. Basically, they are the electronic device which converts direct current (AC) to alternate current (AC) using solar energy. Solar energy is environment-friendly because it does not produce toxin, and is a renewable resource. The pace at which all our energy resources are diminishing day by day, the solar inverter can prove to be a fortunate thing in the long run. Solar electric systems are composed of Solar Panels, Batteries and Inverters. Batteries play the role of storing the energy produced and are used mostly at night when there is no sunlight. The electrical device which will be connected will be getting power directly from these batteries. The inverter converts the DC energy of the batteries and into AC power that can be used at home. If the solar energy is exploited well then we would be heading to a better future positively. There are two different types of solar inverter. The first type is called a True-sine-wave inverter which is very dependable and is the best choice for household equipments. The second type is Modified-sine-wave which is less costly than the previous one. Appliance like computers immediately converts AC power into DC, and so is perfect with Modified-sine-wave inverter.
First and foremost, you need to be conscious of the course of action of the entire installing system, quality of the inverter and the total amount of voltage you need for your home. You should also check whether the solar inverter has passed all government standards and certifications. Many reliable companies are selling solar products now-a-days. It's better to buy solar inverters from a reliable and trusted brand so that you get best vale for your money. Volta group specializes in delivering uninterrupted power supply. They are one of the full products that cover a wide range of power protection products which are admired across the country.
The high quality Solar Inverter comprises of all the latest technology. The most important advantage of using solar energy is that it is eco-friendly and produces no waste or pollution. We cannot imagine a world without electricity today. It is very essential to the whole world. Light bulb, fan, televisions, air-conditioners, all of these cannot function without electricity. Don't forget to take expert opinion before buying any solar inverter. Go green with solar power and enjoy a peace of mind.
About the Author
This is a customer driven company, we focus our efforts on providing the highest quality products with attentive after sales service and support,that ensures total customer satisfaction.
bought a motorhome, plugged into house with adapter blows the breaker in house. Turned all breakers off in coach, plugged into house again and turned breakers in coach on 1 by 1..generator main flipped the house breaker. as of now the generator main is left off and it no longer blows house breaker...is this safe?normal? what does it say? any help would be appreciated. Realize that it's not a big deal, just leave it off but would like to know if something is wrong and what it might be or if it's suppose to be that way (for safety, not running both at same time?)
I've never seen that happen but you only need the generator main on if you're running on the generator so it's really not a big thing.
2001 Chevrolet RV R-Vision Inc Trail-Lite 22 Class B+ 19k Miles Chevy
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I was wondering if a regular generator bought at home depot 3500w would run my 24 ft rv fridge,ac,outlets?
the output is 3500 watts, but the volts are different you need to read the manual to see the true compasity of the generator a quilified electrican can help you determine the formula
I have a Yard Machine by MTD. It was running very, very low (almost to the point of shutting off as if it were out of gas, but I found the air filter was clogged with oil. I emptied all of the oil out of the machine, filled it with new oil and put a new air filter on. However, after only a few minutes of running (and now it was running at normal speed - high idle) I saw oil dripping out of the air filter. I took the cover off and the air filter is drenched in oil. I checked and we did not overy fill the oil...just one quart.
Furthermore, when I put the mower on its side, with the air filter removed, and manual turned the mower blade, oil was barfing out the spot that the air filter was. Ok, time for a new mower but why would oil but getting into the air filter area from inside the mower?
If this is a 3 to 5 horsepower engine, you have way too much oil in there. When you turn the mower on it's side, oil is seeping through the valves, and into the carburetor. If it is a Briggs and stratton engine, just fill oil to the split ring in the fill hole.
When you remove the spark plug is there oil all over it? That would confirm it is overfull
