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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2278086 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 mcci: 1:03pm On Jun 07, 2017 |
HeartforGod: How many hours during the day is your Freezer, TVs and Fans on? If freezer is on all day, I'll recommend you get a timer switch and control when it comes on and off, say between 1pm and 5pm. When children go to school is anyone else at home? If not then on a sunny day it is possible you hit float by 1pm or absorb atleast before children are back from school by 1pm or 2pm |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 1:10pm On Jun 07, 2017 |
Power pressing iron with ur inverter on a sunny day and confirm the current going into d battery from the cc. If high ur installation is OK. If low, then do the following. change ur panel configuration to 2*3 so that ur PV voltage is 50v-70v max. Unlike Epsolar, Fangpusun works best when PV input voltage to cc is twice battery voltage. -if changing to 2*3, use 16mm and above flexible cable. HeartforGod: 1 Like |
Re: Solar Energy, A Complement To FTA by HeartforGod: 2:54pm On Jun 07, 2017 |
Thanks DMerciful, I can do that but getting required length of 16mm copper cable to reconfigure the setup can bore a serious hole in my pocket. ![]() I was considering building a rack to elevate the panels to have a tilt of about 10 - 15 degrees. With this, i may get better harvest and also there will be free flow of air around the panels, thus keeping them cool. What do you think? Wind force on panels during torrential rain is my only fear. DMerciful: |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 2:58pm On Jun 07, 2017 |
HeartforGod:Have you ever connected that controller to a PC before? secondly. when you are home and on a sunny clear sky day.. say around 12pm when solar harvest should be at pick not down the following. The PV watt i.e the watt being generated from the PV and the PV voltage. Since the controller would (as u stated) be in bulk, it means it would be using all power from the pv in charging the battery. It would help to know the mppt pull down voltage of the controller.That would help in determining how optimal the cc is working. My system pull down voltage stays at around 48v (for the 45/150 fangpusun, and 50v for the 50/100 fangpusun) |
Re: Solar Energy, A Complement To FTA by HeartforGod: 3:04pm On Jun 07, 2017 |
Thanks mcci for your suggestion. The freezer is on timer (9am - 17pm), and TV with decode (about 64w), Binatone fans (65w each, atleast 2 stays ON) and LED lights all come ON from about 2:30pm till 9pm. More LED and energy saver lights come ON as dusk approaches. Reducing the panel tilt to about 15degrees is strongly on my mind but don't if that improve my harvest. mcci: |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 3:53pm On Jun 07, 2017 |
6° tilt towards south is d optimum angle and I do not think urs is from d angle. U can manage ur current harvest until u're bouyant to handle d change but that's not d first action I gave.....u need to confirm first with a huge load on d system. HeartforGod: |
Re: Solar Energy, A Complement To FTA by purplekayc(m): 4:14pm On Jun 07, 2017 |
JUO: CPU 1=95 watts CPU 2= 60 " LG LED TV =75 watts LG LED TV = 30 watts LG home theatre DVD player =100 watts LG surround sound player. =(couldn't get the wattage for this guess it should be less than 100) Strong decoder. = 25 watts DSTV decoder. = 45 watts 8 energy saving bulbs @26 watts each Dell monitor= 17 watts Acer monitor = 30 watts |
Re: Solar Energy, A Complement To FTA by purplekayc(m): 4:15pm On Jun 07, 2017 |
GeorgeD1: CPU 1=95 watts CPU 2= 60 " LG LED TV =75 watts LG LED TV = 30 watts LG home theatre DVD player =100 watts LG surround sound player. =(couldn't get the wattage for this guess it should be less than 100) Strong decoder. = 25 watts DSTV decoder. = 45 watts 8 energy saving bulbs @26 watts each Dell monitor= 17 watts Acer monitor = 30 watts |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:47pm On Jun 07, 2017 |
purplekayc:Bros you are still estimating. Just get a watt meter. It will save you money at least ensure you don't waste money. When starting solar. It's important to get your sizing just right. Everything depends on your consumption. Number of battery depth of discharge number of panels size of inverter. And you have to be as close as possible. Checking name plate ratings just aren't reliable. There is no way a sound system uses 100w unless you are using it in a night club or one from 1982. Contact Juo or Frank for a watt meter you will be glad you did. purplekayc: 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:47pm On Jun 07, 2017 |
purplekayc:Bros you are still estimating. Just get a watt meter. It will save you money at least ensure you don't waste money. When starting solar. It's important to get your sizing just right. Everything depends on your consumption. Number of battery depth of discharge number of panels size of inverter. And you have to be as close as possible. Checking name plate ratings just aren't reliable. There is no way a sound system uses 100w unless you are using it in a night club or one from 1982. Contact Juo or Frank for a watt meter you will be glad you did. 2 Likes |
Re: Solar Energy, A Complement To FTA by nene2016(m): 8:02pm On Jun 07, 2017 |
HeartofGod, Were you able to give the bolded a shot? DMerciful: |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 9:49pm On Jun 07, 2017 |
HeartforGod: Hello, ur panels have no air flow under them, hope u know that they get very hot? Once the temp is that high, there is a large drop in the efficiency (silicon prefer cold temp). In ur case, the heat generated at the back of the panels have very little space to escape, so it goes back up to heatup the panels. That's one of the reasons u re getting about 50% of ur total panel wattage. Again ur tilt angle at about 30 is a little high, around 14-10 is ok. 10mm for 35ft is ok for a voltage higher than 80 v. Do this corrections and don't forget to send me a cake! |
Re: Solar Energy, A Complement To FTA by HeartforGod: 11:45pm On Jun 07, 2017 |
Oshomo12: Thanks Oshomo for the suggestion. I will do just that. And will also carry out load test on the panels as gurus in the house did suggest. NB: the cake is currently baking |
Re: Solar Energy, A Complement To FTA by HeartforGod: 11:47pm On Jun 07, 2017 |
nene2016: Hi Nene. I plan on doing that tomorrow. Cheers |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 7:50am On Jun 08, 2017 |
HeartforGod: ooh, i didnt get that part -- so his panels are flat on the roof?.. if so thats a bad idea like the poster above stated, get a local welder to fabricate a short rack for you, using angle iron, if you have a fair bit of trignometry, you can calculate the height of the legs to help you achieve an angle closer to 10/15 deg inclination,---- ie make the front or hind legs of the rack shorter or longer as the case may be, the legs shudnt exceed 12inchies to avoid instability and wind factors |
Re: Solar Energy, A Complement To FTA by HeartforGod: 11:12am On Jun 08, 2017 |
Thanks Earthrealm. Am already doing my rough calculations and i see to get about 10 degrees will require a hind leg of about 2.9 ft but obviously that will introduce instability. So, am thinking of using 1.5 ft (18inches) and then ensure sufficient number of legs (securely bolted) under the panels to bring stability and rule out wind factor. Current production from the array at the moment (11:10am) is roughly 820w (bright sky, cc in bulk mode, battery OCV at 06:30am was 25.1V). Total production for 11:10am is 2kwh. Appliances On at the moment are 240w HT freezer, 40w TV, 24w Decode, one 65w Fan earthrealm: |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 2:17pm On Jun 08, 2017 |
Flat panel mounting for places on d equator is about d best fyi however a little inclination for ours of 6° facing south balances out our 6° offset towards North. Also that 6° inclination provides a washing angle that ensures d rain cleans ur panels. While flat is better along d equator is cos the Sun moves from Capricorn to Cancer(South to North) every 6 months, flat orientation captures both ends earthrealm: 1 Like |
Re: Solar Energy, A Complement To FTA by pranil(m): 2:36pm On Jun 08, 2017 |
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Re: Solar Energy, A Complement To FTA by Oshomo12(m): 3:58pm On Jun 08, 2017 |
DMerciful: hello, I agree with ur words, but the issue here is that these particular panels lie flat on the roof with no or very little air flow under them. so they will get very hot, and reduce the efficiency to about 50%. |
Re: Solar Energy, A Complement To FTA by ola28: 4:08pm On Jun 08, 2017 |
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Re: Solar Energy, A Complement To FTA by DMerciful(m): 5:44pm On Jun 08, 2017 |
If you want to increase the space between panels n roof.....use standard solar mounts. Angle is different from spacing ![]() Oshomo12: |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 5:46pm On Jun 08, 2017 |
DMerciful: |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 6:00pm On Jun 08, 2017 |
DMerciful:Bros I hail o. I am sure u did not read thru my whole suggestions. Spacing one of the Reasons..... There is anoda part I talked about. Thank u. |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 7:02pm On Jun 08, 2017 |
Space will create gap for airflow besides power loss due to temp is than 5%. While u may loose as much as 40% with wrong angles Oshomo12: |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 9:30pm On Jun 08, 2017 |
DMerciful:I will disagree with u on this(less than 5%?). The experiment I carried out shows otherwise. I had two panels flat on the roof, with very little airflow. Between 12:30 and 1:00pm I was getting max of 9.4 amps. These panels should give me nothing less than 14amps( though the angle was around 26deg). I check d temp under the panels, it was very high. What I did was that I have my water pump connected to hoss, and I showered it on panels and the surrounding roof. This last for about 3mins, when I got inside to check the current I was pulling, I could see around 14.7amps! After some time, it went back to around 10 amps. This is what I observed, I want to believe that is more than 5%. The only thing I did was just to cool them down. 1 Like |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 9:33pm On Jun 08, 2017 |
ola28: Very nice price for the combination. 1 Like |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 10:27pm On Jun 08, 2017 |
How did you keep the luminosity (around 1000w/m^2) constant? Even without pouring water, amps rises and falls based on the luminosity which is influenced by clouds you may not even see! If the difference is this much u would have seen water cooled panels ![]() Try watch u cc display for 1hours and see how current rises from 30%-80%-50% and back to 30%. When there's reduction in d luminosity, d cc tracks d max power point and you see the current fluctuating upandan ![]() Oshomo12: |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 5:48am On Jun 09, 2017 |
DMerciful: Lol. There was no cloud cover my brother! I have watched this cc for weeks around that same time (done my experiment in February, peak of the heat at my side). That was the highest current seen so far(9.4amps, even with a resistive load on, eg iron) before I decided to carry out the test. Never saw that current again(14.7 amps), after my experiment( still within same period). Until I gave some space, very good spacing I mean, between the roof and the panel. ![]() |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 5:53am On Jun 09, 2017 |
@DMerciful Anyways, u are correct I am wrong. Maybe I don't know what I am doing, but that is what I have observed and reported. Thank u for ur time. |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 5:54am On Jun 09, 2017 |
In trying to give spacing did you change the angle?From ur experiment, you are saying when you increased d spacing or water cooled d panels u got about 40% increase(9.4 to 14.7 thereabout), in other words roof mounted panels with no space losses 40% harvest! How possible is that? Oshomo12: |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 6:01am On Jun 09, 2017 |
Going emotional ![]() Oshomo12: |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 6:09am On Jun 09, 2017 |
DMerciful:I wanted to initially, but my roof was steep( I feared the wind issue, so I stopped). What I should be getting from the panel should be around 17.9 amps @ around 7-9 deg. But after I factored in the losses due to the angle, I should have about 13-14 amps. But never got that, as in never saw it once! After the test, I decided to give good spacing, the angle reduced by just 6 ie from 26 to 20 deg. I get around 13.5~13.9 amps now, never saw 14.7 amps again. So I ve decided never to use roof mounting for my panels again, cos my target is to get around 3000 watts of panels. So ground mount is what I will do now. 1 Like |
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