What is the distance from the Earth to the moon, and how long does it take to get there? The moon takes an elliptical path around Earth, but on average, it's , miles away, according to NASA. It's , miles away at its closest, and , miles away at its farthest. Subscribe Manage my subscription Activate my subscription Log in Log out.
Regions Tampa St. Letters to the Editor Submit a Letter. Investigations Narratives Pulitzer Winners. Hi there i have paid R to be off frid totally just to find out im still not of them they tell me i need another 6 solar panels plus a mttp control box which will solve the problem that has cost me R extr so now we standing on R and guarentee me ill be totally off grid no eskom power i alreadu have 30 solar panels 2 inverters and 4 lithium batterus apparantly 1 battery costs R during day system runs dine its in the evening when sun os down the batterys dont carry me through i said theres a shortage of batterys no they say the extra 6 solar panels and mppt controller will solve the problem to carry me through in the fve so in the morning it wont change over to eskom it wil go direct to solar.
So im waiting as they are going to install the other 6 todat with controller and then i will see if i no longer am. Now its Wh rating. Kindly review it. As your need is W for 4 Hours per day. While the generating energy is W as sunshine is for 6 Hours. You can read in the previous post about solar panel step by step installation process.
Dear sir I have installed 8 solar panels of 32 v and have ah 16 bty and have converted wiring to dc all lights and fans of dc runs on to dc volt I have four inverter voltas 1. I am prepared to buy all equipment from you. Please can you send some person to my residence at assessing the correct amount of power and equipment and approximately total cost.
For further details please contact me on The the link in the footer note. All calculation with solved examples are provided for solar panel installation. Sir, Please tell me all the requirements for a flat of two ceiling fan, two tvs, three decoders, three electric bulbs.
Also give details of inverter and battery backup. I need solar installation for a 5 roomshouse with 4 security lights, tv and water heating. I love how solar energy turns into one of the cheapest source of new electricity generation capacity in the country. Especially the Philippines, as it is a tropical country. Hi, hi want to connect 2solar panels of w each directly to 12v battery Ah for running the 3 AC ceiling fans. Will it be correct form?
How much backup it will provide? You will have to get an inverter to do so. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Electrical Technology 57 2 minutes read. Show More. Related Articles. You use less battery power with a lower draw.
Battery size is measured in amp hours ah and volts 12V, 24V etc. In this case, W means the appliance needs watts an hour. So how many watts is ah? Inverter inefficiency results in energy loss during current conversion. When you draw a big load, the ah capacity is reduced significantly.
But if you draw small loads, the discharge rate gets smaller. It really depends on how many amps the appliance will use per hour. A battery with a ah rating assumes the usage will be 5 amps per hour, which means the battery will last 20 hours.
Almost all deep cycle batteries use the 20 hour rate. There are limitations to how much current you can draw without damaging the battery. The opposite is true. The lower the current, the higher the ah rating goes. So instead of a hour lifespan for 1 amp an hour draw, you will probably get 50 amps for 75 minutes before the battery is discharged completely.
A ah battery will last 9. This assume the appliance will run for an hour. The battery will last longer if the draw load will only be a few minutes. You can run a 10A device for a maximum of 10 hours. But that same ah battery will last more than days if the device runs just 5 minutes a day. Here is another example.
It draws just. The inverter inefficiency determines how long a battery will last before losing all power. Email Address - will not be published Email address should be formatted user domain. Rate Article 1 2 3 4 5. Engine Oil Filling Machine I feel that is among the so much vital information for me. And i am happy reading your article. But should remark on few normal issues, The web site taste is great, the articles is truly nice : D.
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Jimmy Really good information! Thank you sir. If I may ask a question. I have made a giant 12v battery from some saft 1. You think a w panel bundle would keep this thing charged? Thanks again, Jim. BatteryStuff Tech What you are asking is part of the math problem… A 12v watt panel most likely will put out 94 to amps a day to a battery. Do you believe this is sufficient given your daily draw plus accounting for backup energy for bad weather days? Farouk i am trying to power up watts of eneregy all of them in total are lights ,i have a wat inverter and two bateries 12 volt ah ,my question is how many solar panel i need to charge these batteries on a daily basis or do i need to purchase more bateries my lights are on 12 hours daily , thank you e7.
BatteryStuff Tech Realistically I would tell you to purchase a generator. Trying to run watt an hour for 12hrs a day equates to over 13, watts by the time you factor inefficiencies! As most people see an average of hrs of usable sunlight a day, that would mean you need an array that could collect 3, watts an hour! Emme Hello! Wow, this all makes my eyes glaze over! Please be gentle! BatteryStuff Tech We always try to be kind!
What you are asking is a bit of a math problem, and in order to figure out your problem, you are going to need to get some specification in order to use this calculator. I would first suggest reading our article Solar System the Right Way , as this will guide you through the steps required before you attempt to use this calculator. Douglas S. Duran Good day sir. BatteryStuff Tech Our solar products are not geared to larger home installations, so I would source your question to a local home solar contractor.
To give you a basic understanding of what you might be looking at i would suggest reading our article Solar Systems the Right Way. Jorgen Hi I have 2 car batteries of amps each connected in parallel. Thank you. BatteryStuff Tech What you are asking is basically a math problem… How quickly do you want them recharged? Divide the Amps by the hours you want to recharge them keeping in mind that we really only see 4 — 6 hrs of usable sun on most days, so if you go over that time frame you will be into the next day.
Then take the amp rating you came up with and multiply it by the voltage of the panel to get the wattage of the panel. Sohail hi. This will explain how to put a solar system together, and then link you to calculators to size your system. I have two w solar panels and ah acid lead battery.
Direct sunlight duration is about 10 hours. TECH You will have to look to the back of your panel for its rating, but here is a basic equation that can help:. Please be aware this is the rating off the panel, with that high wattage panel you need to be using a solar charge.
Now you just need to know how discharged your battery is and then you can figure out how long it will take. Michael Hello guys I just want to ask how many watts solar panel dining need To use to fully charge my 12volts 32ah battery with in 7hrs…ty.
This calculator will tell you how much you are pulling from a battery in an hour. How can I calculate the running time before all charges is discharged if all the batteries are in good condition? I have a 18 ahr SLA battery within a Powertech 6 in 1 setup that I am looking to get a solar panel for for use on camping trips.
I am looking to put aprox 6 to 9 amps of power back into the battery per day. Would a 20 watt panel with a PV controller be a suitable setup? Anything I should be mindful of? Thanks in advance. That is what a 20 watt panel will provide an hour through a controller in direct sunlight. The rest is dependent on your usable sun hours. Barialai hi sir I have question about solar? Joshua I have a question: I run a mobile coffee truck and would like to add a deep cycle battery or 2 for running my small appliances occasionally through the day with out having to run my generator.
These are the amp rating for the items: Ice shaver- 3. Also how long would the recharge take on a battery if it was plugged into a wall outlet in my home?
What size of panel, charge controller and how many batteries do i need. Ramesh Sir, I have an 25 Watts battery which should be running for atleast 12 hours an day. I have multiple 12V and 5AH solar panels. So, what is the battery specification I need to use for the above mentioned usage and also how many panels i need to use and we have an average of 10 hours sunlight a day. Enias What is a correct charge controller and inverter which is equivalent to watts solar panel plus Ah batteries.
Would a 18 Watt , 8 Amp solar panel be enough to keep battery charged up? If not, what size solar panel in watts would be needed?. Jeremy Fear Short answer: no.
If you look at the numbers, you have watts going out for some unspecified length of time , and 18 watts going in durring only sunlight hours. Even if the watt load is only 1 hour per day, the 18 watt panel would not recharge enough to run that in an average day sunlight it would take about 24 hours of direct sunlight. Fitzroy If i use a 60watt 12v panel putting out about 3. Cathy Hi sir, can a 60 watts solar panel can charge a 24 volts battery?
We are working for our thesis but we have a problem because the lead acid battery is not charging, the capacity is 10Ah.
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