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UPS Back-up, Also A Complement To FTA / FTA Frequency / Cctv Installation A Complement To Fta And Solar Energy (2) (3) (4)
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Re: Solar Energy, A Complement To FTA by adrusa: 8:47am On Dec 11, 2015 |
samnaija: The measured SOC is not extremely important. It does not always reflect the true state of the battery. It is at best an educated guess based on input and output Ampere-Hour. When the inverter "calculates" that it has returned the removed AH, it then registers that the battery is at 100% SOC. This is not always true. I will say dont worry too much that you are not seeing 100%. It doesn't matter too much. Your voltage of 13.8 is about right for a floating battery. What is important is what voltage do you get some hours after NEPA is off and not on load? What voltage do you get when the inverter is supplying power (on load) without NEPA? About 13V (12.8-13.2V) is fine when the battery is at rest without NEPA or load after a few hours. When you put a load on the battery, you should start off with about 12.6V (12.4-12.7) depending on the load. If you are seeing less, you are either putting too much load or your battery did not get good charge. In my opinion, it is something that you have to personally study to see if you are getting the best out of your batteries. You can only get generic advise here, but each inverter/solar system setup is unique. The voltages you will see will depend on your usage scenarios. Finally, what equipment you are using for your measurement will also affect what readings you are getting. You may need to calibrate your voltage reading if your inverter supports that. You will obviously need a good clamp metre to do that. As to solar support, it will depend on how much NEPA do you get per day. What SOC/Voltage do you get to in a typical morning after overnight use. It is presumed that solar will charge your battery for about 4-5hrs on good sunny days. You can calculate how much solar you will need based on SOC/Voltage of your battery in the morning and what current (in ampere) will you need to put your battery back to full charge in about 5 hours. |
Re: Solar Energy, A Complement To FTA by chris81964(m): 10:11am On Dec 11, 2015 |
Does anyone know a good inverter repair person. I want to out source repairs. Thank you |
Re: Solar Energy, A Complement To FTA by chris81964(m): 10:22am On Dec 11, 2015 |
adrusa: You need to revisit your advice. The state of charge in the morning does not determine his calculation for solar. He needs to look at appliances, lighting and load he intends to power, calculate the number of hours he intends to run each. The final number is his Watt hours. He divides that number by sun hours to get the size of the array. That same number divided by his inverter voltage also gives him the AH he uses. At a 50 % SOC he needs to double that number to get his battery bank. 2 Likes |
Re: Solar Energy, A Complement To FTA by JUO(m): 8:29pm On Dec 11, 2015 |
JUO: Super device, you need to see this little machine in action |
Re: Solar Energy, A Complement To FTA by bobojoshua(m): 9:42pm On Dec 11, 2015 |
GeorgeD1: |
Re: Solar Energy, A Complement To FTA by samnaija: 10:03pm On Dec 11, 2015 |
earthrealm: thnks for the response , inverter is indian. i will take your advice on the external charger and forget it. cash strapped to change my battery arrangement. besides 250 amps battery might not last as long as the 500amps bank. the only option is solar. your input on the charge size is what i guessed somewhere bw 50 or 60 amps, but the panels for the 500ah battery bank remains unanswered. help.... |
Re: Solar Energy, A Complement To FTA by samnaija: 10:14pm On Dec 11, 2015 |
adrusa:this man you be wizard the values you stated are similar to my setup . the battery on nepa gets to 13.8v, but after some hrs without nepa drops to 13v. exactly as you stated. when i load on it drops to 12.6v. overnight usage till morning reads 12.2 v. thanks I was worried about the incomplete soc. but its time to upgrade to solar house. pls help 12v 500ah battery bank, what panel size do i need to charge this batteries adequately since a 60 amps charge controller will be used. |
Re: Solar Energy, A Complement To FTA by c0ogumo(m): 5:30am On Dec 12, 2015 |
samnaija: You need about 6 x 150W panels and a 80A charge controller. |
Re: Solar Energy, A Complement To FTA by RipVanWink: 1:56pm On Dec 12, 2015 |
@samnaija..i still think ur best bet is to change ur 12v 500amp batt bank to 24v 250amp bank...just playing with series/parallel connections..........abi its just a single batt of 12v 500amp u have?!!!......wahala dey if so its the same thing and ur runtime would still be the same.....that way you only need to get a good 24v inverter capable of pushing out 30amp.......same goes for the charge controller you intend to buy...45amp morning star hooked to 1kw 24v panels is ok...or 60amp epsolar cc hooked to 1.5kw 24v panels...........u dont really need an 80amp cc |
Re: Solar Energy, A Complement To FTA by samnaija: 11:55pm On Dec 13, 2015 |
RipVanWink: thnks for response the battery bank comprises of (6 batteries) each 2v 500ah connected in series to give 12v 500ah.60amps cc and about (6 panels 250 watts ) thnks alot. |
Re: Solar Energy, A Complement To FTA by adanny01(m): 7:23am On Dec 14, 2015 |
samnaija: It doesnt add up. 6 x 2v 500ah gave you 12v 500ah? No i dont think so. Its either 6 x 2v 500ah should give you 12v 3000ah Or 6 x 2v 85ah should give you 12v 510ah. |
Re: Solar Energy, A Complement To FTA by Konnektions146(m): 7:46am On Dec 14, 2015 |
adanny01:Series connection- v1+v2=current remain same but voltage increases Parrallel connection -- v1+v2=same but current increases |
Re: Solar Energy, A Complement To FTA by adanny01(m): 8:28am On Dec 14, 2015 |
Konnektions146: I dont think i mentioned current in my comment neither is it my context. Current in this case relates only to charge capacity of the inverter or external charger. I will like to be practical, i have only seen inverters of 12v and above. If samnaija has 2v batteries then he needs a minimum of 6 batteries in series which is exactly the configuration he has. The matter i stressed is the Amp-hour (Ah) rating of his batteries and the total for the bank. Lets define Ah. Wikepedia says Ah is a unit of electric charge, equal to the charge transferred by a steady current of one ampere flowing for one hour Using that, if 1 battery of 2v has a charge capacity of 500Ah as claimed by samnaija, how much is the capacity of 6 batteries connected together? Whether connected in series or parallel, they all get charged by the same charger at the same or almost the same current. Are you saying that all of them cannot store up charge of more than the capacity of 1 battery? If thats the case, whats the point of connecting batteries together, he should have just gotten 1 12v battery. Every battery holds its charge and contributes to the whole bank. If he really has 6 500Ah batteries connected in series or parallel, his bank capacity is 3000Ah. Please i may not be an electrical engineer but i know the difference between current (A) and Amp-hr (Ah). |
Re: Solar Energy, A Complement To FTA by temizeee(m): 8:39am On Dec 14, 2015 |
adanny01:lwkmd ooo.... my oga it is true u are not electrical engineer ooo...... @ALL he is trying to say wattage of d setup either in series or parallel not amp rating....lolz |
Re: Solar Energy, A Complement To FTA by Konnektions146(m): 9:06am On Dec 14, 2015 |
temizeee: My broda, see me see my bicycle |
Re: Solar Energy, A Complement To FTA by adanny01(m): 9:30am On Dec 14, 2015 |
temizeee: Wattage Konnektions146 quoted me. What he quoted was talking about Volts (v) and Ampere-hour (Ah) while he talked about Current (A) and series/parrallel connections and now you talking about Power (watt). Are we in the same page? At least he should not have quoted me and you adding yours, hmmmm not a lwkmd matter at all. Like i said, i am not an electrical engineer but at least i am an engineer and have studied electrical engineering courses and work in the electrical engineering field. |
Re: Solar Energy, A Complement To FTA by adanny01(m): 9:39am On Dec 14, 2015 |
The both of you temizeee and Konnektions146 should prove what you know from the quote below. samnaija: True or false? |
Re: Solar Energy, A Complement To FTA by temizeee(m): 9:55am On Dec 14, 2015 |
adanny01:hey baba nla 2v 500ah battery of 6 pieces is approximately 6kw bro. u can only use it with inverter in series which makes 12v at 500 ah..... diz are simple basics of battery configuration.....see bro all diz wiki research doesn't help most time...they will only confuse you. #wekeeplearning |
Re: Solar Energy, A Complement To FTA by adanny01(m): 10:25am On Dec 14, 2015 |
temizeee: Technically, you are wrong. 2v 500Ah batteries 6 pieces connected in series gives 12v 3000Ah. Did you answer that? No. I just wanted true or false and other stories you wish can be added. You went further to convert to Kwh=(Ah x v)/1000 which no one asked you neither is it what samnaija made a mistake. In stating your result you stated it wrongly which on a good day may pass off as a typo but in this case you went too far missing an important unit. Thats what diferentiates me and others. 6Kw is not same as 6Kwh which is the correct unit. 36Kwh is your answer. Besides that you still maintain the bank is 12v 500ah that gives you wrong answers. Ah is not the same as current A. Stop confusing yourself. |
Re: Solar Energy, A Complement To FTA by adanny01(m): 10:58am On Dec 14, 2015 |
@samnaija I hope you are following. If your batteries are actually 500Ah your bank is 3000Ah and will give you 36Kwh at full charge. Having 6 x 250w panels means you have a total generating capacity of 1500w or 1.5Kw. Assuming average of 5hrs of daily sunshine in Nigeria, 1.5Kw x 5h gives you 7.5Kwh. Of course its not always perfect, due to other factors you may not get it all. That will charge your 36Kwh battery bank in 4.8 approx. 5days. A 60A cc will be a constrain. I'd say your system is grossly inadequate unless its a hybrid system. If your bank is as you said 12v 500Ah that means you have 6Kwh battery bank which your PV array is more than capable of fully charging at 7.5Kwh in a day. That would be cool and you can boast of an off grid system. Like i said before i am not an electrical engineer so feel free to correct me. |
Re: Solar Energy, A Complement To FTA by Konnektions146(m): 11:28am On Dec 14, 2015 |
adanny01: Brother, I really don't know how to write plenty but see the attached diagrams if it makes any sense to you. If not, i will try more so we learn together 2 Likes
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Re: Solar Energy, A Complement To FTA by Barezzi(m): 11:39am On Dec 14, 2015 |
Calm down Adanny01, see the post above me. |
Re: Solar Energy, A Complement To FTA by chris81964(m): 12:02pm On Dec 14, 2015 |
samnaija:Your controller at 12 V is limited to about 720 watts in panels. You might want to add a second controller. On a good day you are not getting the maximum from your set up. 500 / 60 = 8.33 hours is how long it will take to charge your fully depleted batteries. You can theoretically shorten that to 5 hours with the second controller. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 3:00pm On Dec 14, 2015 |
Barezzi: You are right ! Thanks |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 3:01pm On Dec 14, 2015 |
Konnektions146: This says it all.. Learning is a continuous process ! Cheers.. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 3:15pm On Dec 14, 2015 |
kiekie1: Trojan batteries now in stock... Discount prices on TROJAN IND 17-6V industrial line flooded lead acid batteries (1202AH) .. Recent stock price increase to 355k but call now for Xmas bonus purchase/supply prices ... Thanks |
Re: Solar Energy, A Complement To FTA by amingimba(m): 3:38pm On Dec 14, 2015 |
plz what can i use this panel for a friend gave it to me.
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Re: Solar Energy, A Complement To FTA by RipVanWink: 11:42pm On Dec 14, 2015 |
addany10......u r wrong 6 x 2v 500amphr in series = 12v 500amphr but in parallel its 2v 3000amphr 1 Like |
Re: Solar Energy, A Complement To FTA by abunafiu(m): 12:18am On Dec 15, 2015 |
Been observing the engiNearz for sometime now.
We are all learning sha.
Sometimes analysing a series parallel combo can be confusing.
konnections146 posted a diagram. he has summarised it all.
no need for further arguments. Let's have a change of topic. How is the harmattan dust in your area? |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 12:02pm On Dec 15, 2015 |
Seems its affecting my daily average harvest... Might have to pour some water on the panels. |
Re: Solar Energy, A Complement To FTA by chris81964(m): 7:54pm On Dec 15, 2015 |
Barezzi: You are supposed to clean them. It can reduce your production by up to 30% |
Re: Solar Energy, A Complement To FTA by jamp: 8:35am On Dec 17, 2015 |
hello people. we want to install solar lights in our farm. presently we use generator to power the bulbs. we have a total of 27-30 bulbs(energy bulbs) in the farm. please we need honest people to give us price for the cost of getting solar panels,charge contoller,inverter,batteries etc. please send text to 08175286459 with the details. text only. thank you |
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