How long would it take to charge a 212 amp hour 12 volt deep cycle battery using a 60 watt solar panel?
I’m trying to develop a DIY grid tie system & know only the basics about electrical work.
No worries guys I’m a master plumber & have a friend who is a master electrician who would be doing all the wiring. He wasn’t around for me to ask initially. Thanks for the answers!
A typical 60W panel has a 4A short circuit current from spec in first link below. This is most likely about 3.5A of peak sun charging current.
Depending where you live, you may get 2 to 5 hours of peak sun charging current a day. You should be able to find this figure on the internet for your area. It is the number of equivalent full sun hours (that the panel will provide 3.5A). It will take all the daylight hours to achieve this equivalent. Lets say you have 3 hours equivalent, so you will get 3.5A x 3h = 10.5Ah per day average.
The battery is 212Ah, so it takes (1.4 x 212 = 300Ah) to charge it. How many days is this? Divide 300Ah by 10.5Ah per day to get 29 days. This assumes no power lost from the battery over that time. Basically the battery (depending on type) could lose almost that much charge over a month from self discharge, so this panel would just keep a battery of this size more or less fully charged if there is no load.
With an MPPT (Maximum Power Point Tracking) controller this figure could be improved, as the charge is derived from the maximum power, not the maximum current, and could provide more current than the maximum from the panel (using internal electronics).
If you want a grid tie system you need a higher voltage to operate the grid tie inverter. You don’t need batteries, that is one of the reasons for using such a system. These inverters typically require 150-500V from the panels. This is for good reasons of efficiency and cost. Look up “Sunny Boy” (a German model popular in the US and Australia and Europe at least) to get an idea. This inverter adjusts the load automatically to use the input voltage that gets the maximum power from the panels (MPPT tracking). You need 10 x 12V panels in series to get this voltage. That means you can deliver about 600W to the inverter. Usually smaller systems target 1KW as the power from the panels, using bigger panels, or 24V modules etc. The design starts with the total wattage of the panels, as this is the high cost item. A 1KW system may not export much power at all.
I recommend you research this much further, or get some sort of consultancy with someone familiar with your region before you go ahead. There are plenty of references on the web. The wiring is at voltages similar to household voltages so you should get a suitably qualified electrician to do that work.
I know it seems disappointing, but the power from a solar panel is small compared with household use, especially as the full power only occurs a few hours a day. For example, the standby power from your appliances alone will exceed the 60W rating of the panel, so it makes economic and environmental sense to eliminate that by turning things off at the wall outlet. This panel could perhaps power such a small thing as a network router on a 24 x 7 hour basis.
Depending where you live, solar hot water may make more sense than an electrical system, as it represents more energy saving due to higher efficiency, and also is more practical for a DIY project.
You may get government grants, Renewable Energy Certificates (RECs) etc. to offset the cost of some systems in some regions. Hope this helps.
Greenworks 21602 20-Volt Lithium Ion 12-Inch Cordless Electric String Trimmer/Edger with 6 Amp/Hour
|DROK® LCD Pocket Digital Multimeter USB, DC 4-25V Voltmeter Ammeter Thermometer Capacity Electricity Time Watt Meter, Volt Amp Electrical Tester with Alarm System, Support QC 2.0 3.0 Fast Charging
PARAMETERS: -Dimension: 77×45×16mm -Input Voltage: DC 3-25V -Voltage Range Measuring: 4-25V -Current Range Measuring: 0-5.1A (Please keep less than 3A if stays at high current for a long time) -Temperature Range Measuring: 0-80℃ -Accumulative Electric Energy: 0-999.99Wh -Accumulative Capacitance: 0-99999mAH -Accumulative Time: 999 Hours -Voltage Resolution: 0.01V -Current Resolution:…
|Ensupra DC Electricity Usage Monitor; 150Amp Power Analyzer; Battery Consumption; Performance Monitor ;DC Watt Mater for RC,Battery,Solar,Wind Power; 2 Year Warranty
Advanced and high Precision DC Power Watt Meter and Electric Energy Recorder. Measures and displays live Amps, Volts & Watts from any direct current ( DC) electric devices. It also records electricity usage in Watt-hour and Amp-hour. Great for checking batteries (Lead Acid, Lithium ion and others) , output from generator DC power, wind generator power, power inverter, solar panel, turbine generato…
|P3 P4400 Kill A Watt Electricity Usage Monitor Empowers You to Save Hundreds on Electric Bills Electricity bills are rising. Now you can cut down on costs and find out what appliances are actually worth keeping plugged in. Simply connect these appliances to the Kill A Watt, and it will assess how efficient they really are. The large LCD display counts consumption by the kilowatt-hour, the same as your local utility. You can calculate your elec…|
|Motorola OEM Turbo Charger Power Supply SPN5864A SSW-2680US with Original Data/Charging Cable
Motorola DROID Turbo Quick Charge 2.0 Rapid Home Wall Charger SPN5864B – Super Fast Rapid Charging Charger – 15W of power. Will charge Motorola devices with Adaptive TURBO Charging technology built in at an even faster rate! Includes Original Data-Charging Cable…
|Cracking the AP Environmental Science Exam, 2017 Edition (College Test Preparation)
EVERYTHING YOU NEED TO HELP SCORE A PERFECT 5. Equip yourself to ace the AP Environmental Science Exam with The Princeton Review’s comprehensive study guide—including thorough content reviews, targeted strategies for every question type, access to our AP Connect portal online, and 2 full-length practice tests with complete answer explanations. We don’t have to tell you how tough AP E…
|Going Home: A Novel (The Survivalist Series)
Book 1 of The Survivalist SeriesIf society collapsed, could you survive?When Morgan Carter’s car breaks down 250 miles from his home, he figures his weekend plans are ruined. But things are about to get much, much worse: the country’s power grid has collapsed. There is no electricity, no running water, no Internet, and no way to know when normalcy will be restored—if it ever will be. An avid…
|How to Use a Multimeter The Neuhaus Science Projects Guide, How to Use a Multimeter, is written for students in the junior/senior high school.Some science projects require the use of a multimeter/multitester (also known as a VOM). This booklet explains how to use a multimeter to obtain the data needed, without going into the technical details behind the operations. Various photographs and illustrations augment the text.T…|
|Dr.Meter Backlit Accurate Digital Multimeter Volt Amp Ohm Meter Diode Continuity Capacitance Resistance hFE Test, Red
Dr.Meter Our Dr.Meter MS88 digital multimeter is a safe and convenient handy measuring tool for anyone who needs to measure AC/DC voltage, current, frequency, resistance, capacitance, diode, transistor etc. The new NCV (Non Contact Voltage Detection) is a great feature that let you know any voltage over 110V AC (RMS) without touch the wire. No matter you are a professional electrician or just a DI…