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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2275495 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 NiyiOmoIyunade(m): 4:26pm On Aug 24, 2019 |
Somebody here once tried this - I think his NL moniker was @Sinistrian or so - he fed his Zinox hybrid's PV input with the output of another MPPT CC. When I think about it and based on similar experiments I have tried using an MPPT CC to modulate the output of a manual battery charger, my conclusion is that an MPPT CC can take any DC input within it's voltage range - the issue is with the DC power source being able to handle a variable load as the CC varies its internal electrical profile (not sure the right term is 'resistance') to pull more or less current from the power source. The DC power source feeding the MPPT input has to be able to 1) Generate and sustain the required MPPT operating voltage 2) Tolerate the maximum current draw the MPPT may impose from time to time (current limiting ability inside the MPPT may be desirable) 3) Tolerate the very variable load profile the MPPT will present as it sweeps to find a sweet spot. Trippledots: 1 Like |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 6:15pm On Aug 24, 2019 |
mank1234: Yeah, thats a point. But the few "cheap" ones i know of seem to simply do a buck or conversion. I'm not so certain their mppt algorithms are shock proof like more expensive ones_maybe anyone willing to join spare cash with me to purchase one should indicate....Learning new stuffs gives me a special kind of high, but cash is limited jare. Talking abt the cheap ones tho, I'll appreciate a link to check and see if its within my pocket's reach. Thanks for the input bro... � |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 6:30pm On Aug 24, 2019 |
NiyiOmoIyunade: Really? I'll go look for him When I think about it and based on similar experiments I have tried using an MPPT CC to modulate the output of a manual battery charger, my conclusion is that an MPPT CC can take any DC input within it's voltage range - the issue is with the DC power source being able to handle a variable load as the CC varies its internal electrical profile (not sure the right term is 'resistance') to pull more or less current Nice... This is basically the kind of info i need. What do you mean by manual though? Tolerate the maximum current draw the MPPT may impose from time to time (current limiting ability inside the MPPT may be desirable) Very true this. I am thinking a fuse rated at about half the current rating of the charger should do the trick incase the mppt wants to pull too much current. What dyu think?
Thank you so much for your incisive input always egbon. |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 7:01pm On Aug 24, 2019 |
A manual charger - those basic ones that simply feed an AC waveform through a rectifier circuit to produce DC voltage. Manual because they are not smart and have no DC regulation or cutoff - they simply keep putting out a fixed voltage and current into the battery so you have to manually terminate the charge once you have determined the battery is fully charged else battery go swell. I had one of those and used an MPPT CC to regulate the output voltage of the charger - sort of to simulate a regulated 3 stage charge - I cannot say for certain how well it went as I quickly determined that the battery I was trying to salvage was beyond repair and ended the experiment. I do remember though that a PWM CC I had did not even pass through the voltage to battery when I connected the manual charger to the PV input of the CC. Trippledots: 1 Like |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 7:05pm On Aug 24, 2019 |
So curiosity get the better of me eventually and i have my answers now.. ![]() Armed with niyiomolunade s reply i 1. Took a laptoolp power supply rated at 24v/2.5A 2. Using a clamp i momentarily shorted the output to see how the adapter itself behaves in a dead short. I noticed it simply cuts supply once amps reaches about 2A for about 1sec then resumes again. Repeating the same process if the same condition persists. 3. Armed with this new information, i connected the laptop charger to the PV input of my expensive ![]() Result Controller mppt control showed battery charging at 13.3v/ 5-6A. Since the laptop power supply is rated at about 2A, it was apparent the mppt was doing a buck conversion and charging the battery. So my curiosity satisfied at last! I love Science! ![]() Next is to use a higher regulated I/V to feed the mppt controller and see what happens as it tracks that mpp. Cheers. 4 Likes |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 7:12pm On Aug 24, 2019 |
NiyiOmoIyunade: Oh ok.... I get that now. Interesting. I have been using a cheap pwm with a battery of laptop chargers to charge my battery for months now. It did charge the battery, but i noticed when the battery got to float, it still allowed a sizeable amount of current to pass through to the battery. Since power supply here is very epileptic i didn't bother about it since i would be lucky if the battery hit float before we had a power cut. |
Re: Solar Energy, A Complement To FTA by olatade(m): 7:58pm On Aug 24, 2019 |
Please who has an idea of what the low voltage cut-off of a 12 volt luminous hybrid inverter would be? |
Re: Solar Energy, A Complement To FTA by ceaser: 8:29pm On Aug 24, 2019 |
Dishtech: Well, BMSes fail over time. They are presumably designed to last the lifetime (or a little more) of the batteries they come packaged with. Now if you get these components from different suppliers and have them working together in incongruence and their individual lifetime gets spent one before the other; you know what that means. |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 9:20pm On Aug 24, 2019 |
Penuelseun: used or brand new?? that vinpower inverter, u sampled there?. how is your serving you?, does the fan come on at all??. i bought a 1kw unit from a vendor here, it barely lasted 3wks, and gave up ghost, vendor told me verbal sorry ![]() ![]() ![]() |
Re: Solar Energy, A Complement To FTA by hausadreturn(m): 11:19pm On Aug 24, 2019 |
generationz:I need a good power bank for charging my laptop. Which one do you use, or can you recommend? |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 12:07am On Aug 25, 2019 |
Wow... Fangpusun is a solid mppt controller. Two laptop power supplies have paid the ultimate price for science tho ![]() ![]() ![]() This controller is sha solid so far; does true mppt tracking. |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 12:09am On Aug 25, 2019 |
hausadreturn: I recommended one for someone who contacted me some weeks back. Its one of these lithium packs, and the person hasn't given me a complete feedback. But i think its working because if e no work e for don knick my door tey tey. |
Re: Solar Energy, A Complement To FTA by generationz(f): 1:01am On Aug 25, 2019 |
hausadreturn: I use the xtreme 105,000 mah Check jiji Although I'll adviceif you can afford it you get a mini solar set up not more than 8ok |
Re: Solar Energy, A Complement To FTA by generationz(f): 1:02am On Aug 25, 2019 |
Trippledots: Which one? |
Re: Solar Energy, A Complement To FTA by hausadreturn(m): 2:09am On Aug 25, 2019 |
generationz:How much is the xtreme 105,000mah, and where did you buy it? |
Re: Solar Energy, A Complement To FTA by hausadreturn(m): 2:11am On Aug 25, 2019 |
Trippledots:What's the name?/ |
Re: Solar Energy, A Complement To FTA by mctfopt: 4:38am On Aug 25, 2019 |
olatade: 11v to 10.5v 1 Like |
Re: Solar Energy, A Complement To FTA by generationz(f): 5:25am On Aug 25, 2019 |
hausadreturn: I contacted someone on Jiji I bought it last year for 29k It should be almost 4ok now. |
Re: Solar Energy, A Complement To FTA by Penuelseun(m): 7:51am On Aug 25, 2019 |
hausadreturn:I can give you a better one for 12k |
Re: Solar Energy, A Complement To FTA by hausadreturn(m): 8:05am On Aug 25, 2019 |
Penuelseun:Let me see pictures. |
Re: Solar Energy, A Complement To FTA by hausadreturn(m): 8:06am On Aug 25, 2019 |
generationz:Let me dm you. Check your mail. |
Re: Solar Energy, A Complement To FTA by idris4r83(m): 10:03am On Aug 25, 2019 |
12volts or 24volts inverter? Which one is better? Gurus in d house please help |
Re: Solar Energy, A Complement To FTA by generationz(f): 10:31am On Aug 25, 2019 |
hausadreturn: Sorry, I only reply mails from here that are work related for which I provide my mail or phone number. Please, ask your question here. Thanks. |
Re: Solar Energy, A Complement To FTA by mctfopt: 12:11pm On Aug 25, 2019 |
idris4r83: It depends on the application and type of inverter and battery configuration But speaking generally, a lower voltage setup like 12v is usually for light load and small system since all you may require may just be a single 12v battery. Whereas 24v system requires a minimum of two batteries. So both are ok dependent on what you want to achieve. 4 Likes |
Re: Solar Energy, A Complement To FTA by sintolord(m): 12:47pm On Aug 25, 2019 |
Sir George, thank you so much GeorgeD1: 1 Like |
Re: Solar Energy, A Complement To FTA by Dishtech(m): 2:18pm On Aug 25, 2019 |
olatade: 10.6volt. I designed a small system for low voltage cutoff using my PWM CC which I can set the required voltage cutoff. For me I don't want to go below 12.1 voltage. 2 Likes |
Re: Solar Energy, A Complement To FTA by Penuelseun(m): 2:34pm On Aug 25, 2019 |
hausadreturn:Here
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Re: Solar Energy, A Complement To FTA by odimbannamdi(m): 3:33pm On Aug 25, 2019 |
generationz: What will be the specs of the components of this solar setup costing not more than 80k? |
Re: Solar Energy, A Complement To FTA by BetaTechnicians: 9:36pm On Aug 25, 2019 |
Dishtech:Mind sharing how you achieved this? |
Re: Solar Energy, A Complement To FTA by Dishtech(m): 10:24pm On Aug 25, 2019 |
BetaTechnicians:/quote] I have been trying to post the image but unsuccessful, I will draw the schematic diagram and post later. |
Re: Solar Energy, A Complement To FTA by BetaTechnicians: 9:21am On Aug 26, 2019 |
Dishtech: Ok |
Re: Solar Energy, A Complement To FTA by BetaTechnicians: 9:24am On Aug 26, 2019 |
I used this with a 24V dc-coil AC contactor to disconnect a specific load at a particular battery level. though I had to pass it's output through a dc buck to make the output a constant 24V for the contactor.
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