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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2277351 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 makavele: 11:19am On Nov 20, 2017 |
Re: Solar Energy, A Complement To FTA by Saipro(m): 1:07pm On Nov 20, 2017 |
DMerciful: I do that too. My latest installation having that workaround failed, only to discover one of the poles wasn't making contact in the first place, forcing me into all kinds of troubleshooting. Frank replaced the bad breaker free of charge. That was 3 months ago. He does have his moments, 4 Likes |
Re: Solar Energy, A Complement To FTA by morofolu(m): 2:13pm On Nov 20, 2017 |
Still available... morofolu:
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Re: Solar Energy, A Complement To FTA by zeestone99(m): 4:27pm On Nov 20, 2017 |
NoMoreTrolling: I v nt inspected ur setup yet, but for nw jst buy additional panel, change ur config to 3×3... Ur mppt shud b able to tk 150v U might also need a standard roof mount wit adjustable legs to giv perfect angles u can stil reach me on whatapp 08117398294 |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 4:44pm On Nov 20, 2017 |
NiyiOmoIyunade: Dnt wori bro we r porting to lithium ![]() |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 7:22pm On Nov 20, 2017 |
Thanks Guy...we learn everyday ![]() NiyiOmoIyunade: |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:42pm On Nov 20, 2017 |
NoMoreTrolling: What is the name of the mppt controller you are using. Name and model number would do. For a 48v system it's inexcusable to range your panels in series of 2. That's just dump for many reasons 1 You are sending more currents from PV to CC, more currents means more losses especially at the scale of PV modules u are putting in parallel. I bet a sizable about of power is lost to resistance from cabling alone. 2 issues with one leads to a 2nd problem. The losses from 1 reduces the voltage coming from the PV (amps are not affected by resistance, just voltages) of the about 60v coming from your PV between 3 to 5% can be lost to resistance 5% of 60v is 57v that's less than the 57.6v required to probably change a lead acid battery (assuming it's agm batteries flooded requires higher voltage) we are talking about resistance related losses alone. And that's not the only losses u would get. There is heat related voltage loss.. Simply put what eventually hit your battery would not be enough to probably charge it. Lots of power is lost due to the PV getting hot especially when it's mounted on the roof. Panel can lose 10% of their power thanks to heat.. Most of this affects the PV voltage. 3 your mppt is pretty much useless with this arrangement. Might even be better served with a pwm. No extra voltage from your Pv to make mppt worth it. Would have been perfect if u go 3 series string. Sending 90v down the wire would reduce resistance, give enough buffer to properly charge your battery and bring your mppt controller to work. As long as your mppt can handle the voc its a no Brainer. Also check your cabling and also do a check of each panel to be sure they are working. Change your panel arrangement to save your batteries. 1 Like |
Re: Solar Energy, A Complement To FTA by mank1234(m): 8:23pm On Nov 20, 2017 |
You can limit maximum current some MPPT controller like MorningStar Tristar can output by changing the configuration. He might have done that to save your battery from excessive gassing due to too high charging current. 200AH battery can be charged at 60A but it's not ideal. 20A (C10) rate is optimum. If you size output base on load, don't you think you risk damaging your battery when the anticipated load are not in use and sunshine is optimum? Discuss with him if he limited it. If he did ask him to add another 200AH of battery and change the settings to btw 40 and 50A maximum. NoMoreTrolling: 1 Like |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 9:48pm On Nov 20, 2017 |
NoMoreTrolling: It like you have more information, than the installer, just check the MPPT controller specs sheet or snap the picture and upload here.. PV output depends on the load/battery SOC that's basic... If your battery bank is fully charged.. your load will draw current from the Panels, and if the load is not there then there is no harm charge controller know what to do, even PWM ![]() Check if temperature sensor is connected to battery sometimes it's limit the maximum output, based on battery temperature settings. Maximum PV output depends on 1. Sun intensity... Cloud factor 2. Temperature of the Panels 3. Note that there is difference between daylight and sun hours Panels gets maximum current of up to 80- 100% by 11 to 1pm 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:26am On Nov 21, 2017 |
mank1234: It's all about smartly designed systems. My PV array can push out 50A to my 220ah 24v battery which is far from ideal. What I did is to break what goes into the battery using opportunity loads. A fridge and Freezer set to automatically start from 9am till 5pm will ensure that battery never gets charged more than 27ah during bulk, by 12pm when panel is able to push more than 27a into the battery (opportunity loads be damned) the battery is already in current limiting absorption charge stage. The biggest problem with his setup is putting 2 panels in series. Such with never do more than surface charge his battery into an early grave. Little wonder he doesn't get any charge whatsoever once it's evening. 2 Likes |
Re: Solar Energy, A Complement To FTA by idsolar(m): 6:18am On Nov 21, 2017 |
I still have these 2 charge controllers for sale. 1.Roysolar charge controller 12/24v 60amp 2. Roysolar 12/24v 20amp Interested? Call/sms 08033735359 |
Re: Solar Energy, A Complement To FTA by chris81964(m): 4:41pm On Nov 21, 2017 |
We did a video on Monitoring using the Conext Combox. Enjoy. We will be doing one with the Victron Color control very soon http://atlanticwastepower.com/videos/ https://www.youtube.com/watch?v=h6fvIJjEakE 1 Like |
Re: Solar Energy, A Complement To FTA by shogz89: 8:31pm On Nov 21, 2017 |
Pls how much will It cost me to get the whole setup (solar panels inverter with two batteries)? |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 8:55pm On Nov 21, 2017 |
shogz89: Yes I love seeing prospective clients as it reminds me of how I ventured into my solar set-up... I like your courage... Fell free to call-contact me for detailed enquiries & discounted prices !!! https://www.youtube.com/watch?v=hmrHfVm2h1s Sir Frankie Smartcell global services 081-350-319-51 1 Like |
Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:29pm On Nov 22, 2017 |
kiekie1: Thank you K.k, bigrovar, zeestone99 for your input regarding the setup. I will call the contractor back to see if he can change the setup to 3X3 instead. I just didn't want to stand my ground then, because as they say, no one knows everything. So I figured I'd trust the guy that has done 100s of installs. Here is the charge controller he bought, the first one he bought spoilt, so he had to replace it with this one. The max PV voltage is usually like 60 something, but as soon as you load it, the pv voltage drops down to battery voltage, around 51-55v depending on the weather. It just doesn't seem right for MPPT. Thanks again guys, may this thread and all our endeavors continue to blossom! 1 Like
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Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:38pm On Nov 22, 2017 |
mank1234: This is what I'm trying to wrap my head around. Are you saying charge controllers aren't smart enough to regulate battery charge current while simultaneously providing load current? That seems weird. I though if I needed 30 DC amps for a load, the C.C would provide the 30amps as long as the panels were capable of providing that power. So in essence, the battery is not really being over charged, but the current is simply flowing to the load via the inverter. Still learning though, I will ask him about any kind of limit. |
Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:42pm On Nov 22, 2017 |
Dam5reey: In Lagos, the sun sets at 6:40pm. So if you go outside by 6:15pm, there would still be light outside, but obviously not sunlight. However, at 6:00pm, my C.C is showing 0amps. At least gimme 1amp na ![]() I will note if there is any difference after the installer reconfigures the setup. |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 12:52pm On Nov 22, 2017 |
NoMoreTrolling: Poor cabling(power loss inevitable) , secondly I dnt knw anytin abt dis controller, but den I remember a client of mine bought a controller himself wch mppt was written all over it. As soon as we loaded it above nominal voltage the controller beeped pv voltage overload. I tink u jst purchased one of those(I'm nt sure dis controller is true mppt, i might b wrong though), that cud b a reason for poor harvest. 4 Likes |
Re: Solar Energy, A Complement To FTA by mank1234(m): 7:58pm On Nov 22, 2017 |
At bulk stage, of charging the controller will output all power (current) it can squeeze out so long as it is within its currents limit. Without enough load to divert a part of this current, you risk damaging your battery in the long run Good design for off-grid in southern Nigeria should follow this pattern: 1) determine daily consumption in kWHr. 2) design your panel and charge controller to deliver 120% of this using an average sunlight of 4-5hrs 3) determine what percentage of your consumption falls between 4pm and 8am (night) 4) size your battery to be 3 times the capacity determined in 3 above to take care of cloudy,hazy days. NoMoreTrolling: 2 Likes |
Re: Solar Energy, A Complement To FTA by mank1234(m): 8:15pm On Nov 22, 2017 |
Example, if my daily consumption is 4kWHr, of which 3kWHr is at night, then: Solar panel should be 1200W Charge controller that can handle this is 40A MPPT @ 24V or 80A @ 12V 3 days night energy need is 9000WHr. Which is equivalent to 375AH battery @ 24V or 750AH battery @ 12V. (Actually 400AH/800AH to take care of inverting inefficiencies. Inverter to be used will be determined by maximum instantaneous load. If my night load were to be 1.5kWHr instead of 3kWHr, battery will then be 200AH/400AH. 2 Likes |
Re: Solar Energy, A Complement To FTA by makavele: 8:42pm On Nov 22, 2017 |
Let me correct a misconception here . . . Take for example a 40A mppt controller on a 600W array connected to just a single 12V 100Ah battery On a very good day, during bulk charging the array is capable of pushing out 25-30 Amps But we all know it is best to charge batteries at one-tenth capacity (C10) i.e. in this example 10A; So your controller is pushing 30A, which is an overkill for the battery. Most people, like the poster above me, believe you can add or turn on some load to reduce the current entering the battery. This is a misconception and why is so? 1. The PV array does not directly power any load connected to the inverter/battery bank. 2. What happens is that the battery is discharging and charging at the same time albeit very fast. 3. If for example, the total load turned on is 100W; and the PV is producing 150W; what happens is that the load will draw 100W from the battery (discharge); and at the same time the PV will pump in 100W (recharge) to the battery to replace what is lost and 50W is used to keep the battery in float (if it is already in float); or used to keep charging the battery if it isn't yet in float SO back to our example, what if the CC is delivering 30A on a c10 rated battery . . if you like turn on all the load in the world; what is happening is that . . the CC is still sending in 30A to your battery and in turn your battery is powering the loads connected, be it 10A, 20A, 2A, 100A If the CC amp is greater than the load, the battery stays charged up if the load amps is greater than CC amp, the battery will start discharging even while being connected to solar. Thanks 2 Likes |
Re: Solar Energy, A Complement To FTA by fernado56: 8:53pm On Nov 22, 2017 |
Hello House, I have been following this thread for long and i give kudos to all members for the enlightment so far, i want to Install a Solar System to Complement PHCN and Here are My Loads wattage Below , Please Kindly Advice on Nos of Panel and Batteries , I was thinking 800w, 40A pwm , and 4 Pcs , 12v 100AH, 24v 1.2/1.5kv inverter. Please all the expert kindly advise me .Also any reliable Installer that can give after installation service at ibadan. .' Refrigerator watts = WattHours =60w ........ for 5hours...................300w/hr Television watts = WattHours = 70w.......For 8 hours daily............ 560w/hr DVD home theatre WattHours = 110.......For 7 hours daily............ 770w/hr House lights led watts = WattHours= 65w... for 6 hours daily........... 390w/hr House lights others watts = WattHours= 120w... for 2 hours daily........... 240w/hr Computer system = WattHours = 65w....... For 6 Hours daily........... 390w/hr Misc items watts = WattHours = 50w ..... For 2 Hours daily........... 100w/hr Summary of WattHours required Total daily WattHours required = 2750w/hr |
Re: Solar Energy, A Complement To FTA by mank1234(m): 8:58pm On Nov 22, 2017 |
makavele: Sorry, I had to quote you. That's not how electricity works. The battery only sees the net current flow, which is the difference of what it takes minus what it gives. So you're very safe if you as I postulated. Things only get wrong if your your load gets disconnected. Let's even look at it from a lay an point of view: take the battery to be a container with 2 openings - inlet and outlet. If you put 2 litres of water into the containtand takes out 1 litre, as far as the container is concern, you're adding 1 litre. What happens outside the container is irrelevant to the container. 1 Like |
Re: Solar Energy, A Complement To FTA by mank1234(m): 9:05pm On Nov 22, 2017 |
fernado56: In my opinion, you're good. Since you're using PWM, be sure your arrangement of the panels matches 24V. 2 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:06pm On Nov 22, 2017 |
I checked online and the Yohako MPPT CC appears to be rated at input VoC 96v and max current 80a - this is probably the reason why your installer used a 2 panels in series config for you. The challenge is now that this controller is mismatched for your application as you are using a 48v nominal system. MPPT requires some 'voltage headroom' to operate properly e.g a 48v nominal system will charge batteries anywhere from 56v to 62v (allowing for desulfation voltages) - at the panel side you will need at least 90volts to give sufficient headroom for the Charge Controller to 'boost' current and realise MPPT benefits - with 24v nominal panels, you need a minimum of 3 panels in series to achieve a useable MPPT voltage range for a 48v nominal battery bank - unfortunately, you will fry the Yohako at this voltage level. Its either you switch to a 24v inverter and keep the Yohako as is OR you set your panels as 3 in series and change to a different controller capable of at least 150vdc e.g Chinco EP Solar/Fangpusun or the venerable MorningStar or Midnite Solar, Magnum e.t.c As it is now you have an MPPT CC but operating like or worse than a PWM because it is not suitable for your application You still have to ensure your panels face either South or West or East (some folks on here do North but I have no idea how that works) in that order of preference, your panel mount tilt/angle is relatively flat, no shading on the panels, properly sized cables e.t.c to be sure you have captured all angles. But clearly, it appears your issue is a poorly designed/mismatched system and you will need some tweaking to get it right. NoMoreTrolling: 6 Likes |
Re: Solar Energy, A Complement To FTA by makavele: 9:13pm On Nov 22, 2017 |
mank1234: Your analogy is seriously flawed because unlike a container, a battery has only 1 opening . . the same opening for inward and outward current . . . Current must flow to load first; and be replenished by solar array (when under load) Or no current flows to load, and current is received by solar array (when idle and charging) so when 30A flows to load, for example, and solar pumps in 40A back . . . current flowing into the "opening" is still 40A; (which will kill a typical 100Ah or even 200Ah battery over time) and not 10A Best bet is to increase battery bank You garrit ? |
Re: Solar Energy, A Complement To FTA by mank1234(m): 9:32pm On Nov 22, 2017 |
That's so wrong! What will an ammeter placed before the battery read? 10A or 30A or 40A? It will definitely read 10A. That place before the inverter will read 30A, that after the controller will read 40A. The inbuilt diversion mode of some controller with that feature works this way in principle. makavele: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:32pm On Nov 22, 2017 |
Please what brand/name is this inverter and how can I get one? Also what is the max charging amps? I want to gift it to a family member this festive season Saipro: |
Re: Solar Energy, A Complement To FTA by makavele: 9:39pm On Nov 22, 2017 |
mank1234: I do not like guesswork. Please place an ammeter between charge controller and battery bank; and let us know what you get, Then place between battery bank and inverter and let us know what you get too . . before you do this, please ensure the CC is supplying more than the c10 or c20 current thanks |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 9:45pm On Nov 22, 2017 |
NoMoreTrolling: By 6pm your PV voltage will be lower than battery voltage hence 0 Amp |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:55pm On Nov 22, 2017 |
NiyiOmoIyunade: Lol ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:57pm On Nov 22, 2017 |
fernado56: Contact : See signature for mobile number ! 2 Likes |
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