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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2151657 Views)
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 bigrovar(m): 7:02am On Aug 29, 2016 |
chris81964:will hit you backstage thanks 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:22am On Aug 29, 2016 |
Dishtech: with what you have stated, lets do some maths. 4 200AH 12V battery in a connected in series = 48v 200AH. Assuming the batteries are rated at C20, hence your recommended discharge rate should be no more than 480wh anything more than this and you have effectively reduced capacity your battery from 200AH. Your 415 watt discharge rate is just ideal. Regarding the numbers of panels you need. You need a minimum of 4 a maximum of .... well that depends. all things equal. amount of panels depends on 1. Type of batteries you have. If you are using a flooded acid battery, then your panel number should be limited to your batteries rate of charge. an average FLA should not be charged more than 13% of C20. in your case that is 26A.. anything more than that would be wasted has heat, cause the battery to boil and shorten it's life span eventually. might even cause a termal runaway if the charge current is way more than the battery can handle. Hence if you are using FLA battery you might want to stick to 6 panels arranged in a series parallel string of 3x3. Another alternative is to get charge controllers which allows you to set bulk charge currents, then you can set the bulk charge current to about 26A. In that case you can get as much as 9 panels and arranged them in a series parallel of 3x3x3. Better still get an AGM battery, those are capable of fast charging and can take close to 30% of C20. when if your batteries are AGM then you can get 9 200w batteries and arranged by 3,3,3 = 1800 watt pick. and when you remove the usual panel and controller efficiency 1,386w (1800 / 0.77) Ultimately, the number of panels is decided by your usage. A well designed offgrid setup will ensure that the battery is properly circled every day, hence what you use today is replaced tomorrow. hence you get enough panels that will ensure that you can adequately replenish what is taken from the battery bank no matter the weather. This is why energy conservation is very key in renewable energy, the greater part of going solar is looking for smart ways to reduce your energy footprint. The use you use the less you need to generate. 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:10am On Aug 29, 2016 |
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Re: Solar Energy, A Complement To FTA by Gennextech: 10:00am On Aug 29, 2016 |
NIgerias largest solar powered filling station PETROCAM IN AJAH LAGOS STATE ppowered by Gennex technologies (93.84kwp) 1 Like
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Re: Solar Energy, A Complement To FTA by azz19: 10:34am On Aug 29, 2016 |
A friend of mine is conducting a survey regarding power supply in Nigeria. Kindly help him by taking part in the survey. https://docs.google.com/forms/d/e/1FAIpQLSeBBtSt52RMDUckh3SOtzAnaQ8Qwwia2mVfFW8d_yopmcO4bQ/viewform?c=0&w=1 |
Re: Solar Energy, A Complement To FTA by battleaxe: 10:40am On Aug 29, 2016 |
Wow! This is massive! Never thought fuel dispensing pumps were such energy guzzlers! At almost half a megawatt-hour production daily, I'm almost tempted to say this is more energy than they need.... And that it would be almost impossible to recoup the cost for this, from just fuel sale. That's some 60-70M there! Still, very impressive. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 1:39pm On Aug 29, 2016 |
battleaxe: Yep that's a finished project ... Talk more on your set up/purchase ! Tnx |
Re: Solar Energy, A Complement To FTA by battleaxe: 2:11pm On Aug 29, 2016 |
As in I'm not understanding you!! Seriously, we're allowed to appreciate na! 2 Likes |
Re: Solar Energy, A Complement To FTA by Gennextech: 2:17pm On Aug 29, 2016 |
This system doesnt only power the nozzles, it also powers the Gas dispenser and the mall thats in the filling station, Thank you sir battleaxe: |
Re: Solar Energy, A Complement To FTA by Gennextech: 2:18pm On Aug 29, 2016 |
ahn ahn oga me just an appreciation kiekie1: |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 4:59pm On Aug 29, 2016 |
Lovely! We're getting there... Take a look at the link below,it's a very comprehensive analysis of renewable energy in Nigeria. Very interesting read... https://www.giz.de/en/downloads/giz2015-en-nigerian-energy-sector.pdf |
Re: Solar Energy, A Complement To FTA by life707: 11:34pm On Aug 29, 2016 |
Barezzi: Thank you for this educative and informative document. I haven't finished reading it but I am grateful to you for sharing. God bless you 1 Like |
Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 1:54pm On Aug 30, 2016 |
Gennextech: Great! So the oil industry admits that solar power is more efficient, cheaper in the long run and cleaner than burning oil and gas to generate electricity. (For your information the French oil company Total bought SunPower some years ago in order to build Solar power parks/plants and to become an independant electricity provider.) |
Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 1:55pm On Aug 30, 2016 |
Barezzi: Thanks for the link! It is a valuable study. 1 Like |
Re: Solar Energy, A Complement To FTA by Gennextech: 5:44pm On Aug 30, 2016 |
Good day, we have 12v 100ah Agm Batteries, 12v 200ah Agm batteries and 12v 100ah Gel batteries in stock, please find price list attached |
Re: Solar Energy, A Complement To FTA by Blackestmamba: 4:33am On Aug 31, 2016 |
Is there anyone here with a Solynta packaged solar installation? Or someone who knows someone who has? Can you give us a review? |
Re: Solar Energy, A Complement To FTA by azz19: 7:49am On Aug 31, 2016 |
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Re: Solar Energy, A Complement To FTA by azz19: 7:52am On Aug 31, 2016 |
Pls how can I get the latest price of foreign inverters and batteries iLoveTheSun: |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 8:26am On Aug 31, 2016 |
Gennextech: pls post a pic of your battery enclosures, but open and closed. 2ndly am yet to see any solar cable bigger than 10awg/7mm, so @house do u guys simply use normal/house wiring 10mm or 16mm cables?. if yes, how is it holding up to the elements/weather etc, or u put it in pipes? 1 Like |
Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 11:36am On Aug 31, 2016 |
earthrealm: Solar cables are double insulated with UV resistant PVC. 4 mm2 for length shorter than 25-30 mtr. (it's my own rule of thumb the resistance should be as low as possible, e.g. power loss < 1%); 6 mm2 for longer distances; 10 mm2 are found rather in large solar parks with central inverter. For Solar DC on residential houses 4 and 6 mm2 should do. I wouldn't recommend normal cables. UV resistant PVC pipes are not cheap in my opinion. I have a picture of a commercial installation. The pipe is 5 years old... with many cracks... 1 Like
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Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 11:41am On Aug 31, 2016 |
azz19: Hello @azz19, let us please know what you need?! |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 3:48pm On Aug 31, 2016 |
iLoveTheSun: Errm, i beg to differ, ur statement is general and sweeping, there is what is called cable sizing in solar systems [you shud know this na]. for example i have a 1kw panel feeding a 24v inverter, i may be fine with #10awg/7mm is rated for 15amps x 2 for distances shorter than 25ft or so...if longer the losses will exceed 5% which implies power losses upto 100w n rising depending on th e distance, so assuming same setup the owner increases his panles to 2000w wch is about the max 80amp mppt CC can handle for a 24v setup, thus this wud imply 2strings of 4panels each or 3 x 3 config, so as not to exceed the 150v rating of most CC's, thus you are looking at 2000w/120v or 2000/90 wch ends up giving you about 22amps, and thus ur losses if you are using #10awg cables might rise to 10% or more if your distance is more than 25ft. the optimum design is to keep losses under 5%, thus shorter distance btw panels and CC is always recommended |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 3:55pm On Aug 31, 2016 |
earthrealm:
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Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 8:56am On Sep 01, 2016 |
This looks like a shielded audio (stereo) cable. 'max 600 Volts' Solar cables state 'max 1000 Volts'. 1 Like |
Re: Solar Energy, A Complement To FTA by Konnektions146(m): 9:03am On Sep 01, 2016 |
A friend has a setup in lagos Needs it to be moved from old apartment to the new apartment solar , CC, inverter , battery Who can ? |
Re: Solar Energy, A Complement To FTA by Nobody: 9:18am On Sep 01, 2016 |
Konnektions146: where is the location? if its within Lagos u can reach me on 080xxxxxxxx |
Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 10:05am On Sep 01, 2016 |
earthrealm: Good morning, I think you misunderstood me? Just for clarification I think you have a different wiring scheme in mind than me?! I am referring to the wiring of a single string between the solar panels on the roof and the connection point. (Let's take a standard solar panel with 8 Amps (Imp)). A single string can have up to 1000 Volt (Uoc) depending on the inverter. And if you have multiple strings, then I have multiple pair of solar cables coming from the roof. I would suggest to connect them in a combiner box with fuses. The wiring between the combiner box and the solar inverter is a different story, which you described. Cable sizing is a must for safety, I agree. My threshold of 1% loss is my personal preference, that's why I call it rule of thumb without calculating. (And if you have higher voltage entering into an MPPT solar inverter, your MPPT starts working sooner in cloudy weather as well. If you can afford it and invest more in copper, you will get more juice at the end of the pipe.) |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 10:30am On Sep 01, 2016 |
aha, combiner boxes, thats the missing link!, i clean forgot about them, thats probablly what most folks use for multiple strings, cos after 2kw, running a single string gets a lil hairy my brain was fixated on having a single string linking your panels to CC. @ILOVETHESUN, THE PART U SAID A SINGLE STRING HAVING UPTO 1000v depending on your inverter?...i find it a lil strange, yet to see an inverter or CC that can accept 1000v, kindly shed more light on this 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:41am On Sep 01, 2016 |
iLoveTheSun: Maybe, works well .. Fire resistant armoured copper cable ! |
Re: Solar Energy, A Complement To FTA by iLoveTheSun(m): 1:11pm On Sep 01, 2016 |
earthrealm: Sure, 1000 V is open circuit by the way, so maybe 800 V Umpp hits the inverter. (By the way, you can burn your fingers when not properly isolated ) You can connect grid-tie solar inverters, e.g. SMA SunnyBoy, to SMA Sunny Island on the AC side. SMA Sunny Island is the charge controller for a 48 V battery bank. During sunny days you get AC from the solar inverter, that can be used directly/immediately by your AC loads. The surplus is stored in the battery. The advantage for big solar installations, like mini-grid or three-phase: there is no conversion and therefore less loss from converting high-voltage DC from the solar panels to 24/48 V battery bank "bus" and then from DC to AC. In general, for loads < 4.6 kVA, DC bus "architecture" is prefered. (And regarding solar parks there are even central inverters that support upto 1500 V DC and convert to 460 V AC to connect to MV transformator... just saying to complete the picture!) |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 3:41pm On Sep 01, 2016 |
I suppose hybrid inverters can take up to 1000Vdc... |
Re: Solar Energy, A Complement To FTA by Gennextech: 2:01pm On Sep 02, 2016 |
the infinisolar 10kw can take up tp 1000vdc Barezzi: |
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