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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 NiyiOmoIyunade(m): 4:47pm On Mar 20, 2018 |
I let the matter die to preserve the peace But as it has been resurrected again...... It appeared to me that he was cleverly fudging his actual PV array size, making it seem as if a 1.6kw array 'very similar' to @Durodee's was generating circa 8.9kwh regularly on a daily basis here in Lagos. This would imply he had discovered some holy grail of PV yield optimization or owned a super performing kind of panel or other variable responsible for his superior results.... The reality I 'knew' was that he had an oversized PV array around 2.4kw and stating this fact would have helped any reader to understand and put his yield results in proper perspective. A 2.4kw array generating 8.9kwh daily on a regular basis is normal and expected. To be clear I am a fan of oversizing PV arrays if the CC supports it - I just wanted him to clarify things so that no one was inadvertently misled. Again it is not impossible that a 1.6kw PV array generates 8.9kwh daily under optimal weather and load and battery DoD conditions but I don't expect it as a daily occurence here in Lagos given the vagaries of our weather. I am happy that you have put this matter in a whole new perspective and it makes perfect sense to me. JUO: 5 Likes |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 5:17pm On Mar 20, 2018 |
NiyiOmoIyunade: Jst one simple question that was asked(size of array), everyone is debating wit long post, I dnt undastand u ppl and y wud it b difficult for sum1 to say he X number of panels. 6 Likes |
Re: Solar Energy, A Complement To FTA by makavele: 5:43pm On Mar 20, 2018 |
zeestone99: You go fear nah Anyways me I have a 500Wp array and I constantly generate over 22.3kWH per day; even during rainfall Kill yaself if you don't believe me 1 Like |
Re: Solar Energy, A Complement To FTA by dapsyra(m): 5:58pm On Mar 20, 2018 |
zeestone99: In DIY fora, the internationally acceptable convention is for members to list their gears/equipment in their signature so that others can read their posts in conjunction with their equipment list. This practice, if adopted in this forum will put members' posts in better perspectives and reduce misconceptions. 5 Likes |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 7:01pm On Mar 20, 2018 |
Hello people. I need your help on this one. A friend's Genus 1.5kva proton Q inverter spectacularly blew up FETs in December. he had put on his 3.5kva generator (which he had previously used several times to charge the inverter batteries) and heard multiple explosions and saw the proverbial smoke. The inverter was repaired and recently, the FETs blew up again. He believes it was a result of high voltage from his public utility transformer because he changed from a phase that had a low voltage to another phase before he heard the FETs blowing up. please what can be done to prevent the incident from happening again ? |
Re: Solar Energy, A Complement To FTA by dapsyra(m): 7:07pm On Mar 20, 2018 |
dejidotun2000: Let him install a good quality servo stabilizer between the mains/gen and inverter. 2 Likes |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 7:38pm On Mar 20, 2018 |
What model and rating would you recommend for a 1.5kva inverter. Thanks dapsyra: |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 7:39pm On Mar 20, 2018 |
makavele: |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 7:40pm On Mar 20, 2018 |
dapsyra: I concur |
Re: Solar Energy, A Complement To FTA by rezzy: 7:49pm On Mar 20, 2018 |
I saw lumos yello box at mtn office and I got interested because we have been in darkness for 1 year now. I asked about 3 persons how reliable and efficient the lumos yello box is and was told it's rubbish. One lady then advised me to install solar. I told her I don't have the fund, she said with about 250k, that I can install it. My question now is, will that amount be enough to install solar? Note; I will use it to power freezer, TV, decoder, and bulb. Thanks |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 7:49pm On Mar 20, 2018 |
A servo stab would be the perfect solution to regulate voltage except that it would cost more than the 1.5kva inverter he is trying to protect. If he is sure that the cause of the FETs blowing is actually 'high mains voltage' then he could buy a voltage regulation device like the Sollatek AVS 30 (attached pic). It has things you can turn inside it (I bow to my Oga Makavele ) to adjust both the low and high voltage cutoff points. The device costs 8,500 for the 'fake' and about 17k for a better version sold at 'Game stores' I am recommending this because of the relatively low price point and ability to finely control the voltage setpoints - it's the one I know but there may be better or cheaper options. Please note the AVS30 cannot boost low voltage or help reduce high voltage, it can only help prevent voltage lower or higher than the specified tolerance from passing through to damage the connected equipment Also a good quality 3kva or higher size relay stabilizer could work but I do not trust their over voltage response times - I have had equipment connected to a relay stab blow because the high voltage managed to pass through for a while before the stabilizer could respond but the Sollatek AVS30 has never failed me. Now is also a good time to check the Generator voltage and frequency with a mulitmeter and have a competent hand adjust them to a safe range and also change the generator AVS if required. Prevention is always better than cure. As Oga Dapsyra said whatever voltage regulator he chooses should be before the mains or Gen power input into the inverter. Other ideas and solutions are also welcome dapsyra: dejidotun2000:
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Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 7:51pm On Mar 20, 2018 |
If his budget can accomodate a servo stab then 5kva is more than enough for his 1.5kva inverter. 5kva is also the smallest size of servo stab I have ever seen available locally but I could be wrong dejidotun2000: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 8:15pm On Mar 20, 2018 |
Hmmmmm. A 250k budget is rather lean if you plan to power freezer, TV e.t.c off solar because just 1 good 12v 200ah battery would cost over 100k not even bringing in Panels and Charge Controller and other key elements. But nothing is impossible if you are determined and creative, you may be able to get a good deal on used equipment in good condition but just be careful to not throw good money away. Folks in the house would soon chime in with ideas. rezzy: 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:08pm On Mar 20, 2018 |
JUO: Lol Juo ! |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:08pm On Mar 20, 2018 |
JUO: Word ! |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:10pm On Mar 20, 2018 |
efuro: Hello, Sorry I have been out of town and surfing network isnt OK here ... I will give you feedback soon ! Thanks |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 9:50pm On Mar 20, 2018 |
Many thanks sir. We are not certain that the FETs were blown up by the generator the first time and high mains voltage the second time. What else might have caused the FETs to blow up ? NiyiOmoIyunade: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 10:15pm On Mar 20, 2018 |
Depends on which FETs blew up. Many factors can make them blow apart from the ones you already suspect - overload because a too large load was not isolated off the inverter, short circuit due to wiring errors or mains/Gen backfeed e.t.c e.t.c All I was trying to say is that he should do the minimum to establish the real root cause before he starts spending money to solve the wrong problem e.g use a multimeter to read the Gen voltage and see if it is too high or normal range. If the Gen voltage with no load on it is within 200 to 230volts AC then it definitely was not high voltage that spoilt the inverter but rather perhaps a wiring issue or short circuit or backfeed. Wiring issues or short circuits may be easily identified by placing a suitable sized AC circuit breaker (MCB) on the inverter output - if the breaker trips when changing over from inverting to mains/Gen then you know you have a wiring problem or shortcircuit or overload problem to deal with. dejidotun2000: |
Re: Solar Energy, A Complement To FTA by Pharyn(m): 10:42pm On Mar 20, 2018 |
1 Share
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Re: Solar Energy, A Complement To FTA by makavele: 1:53am On Mar 21, 2018 |
NiyiOmoIyunade: Pick your poison , , , hard-boiled or fried ? 2 Likes |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 6:34am On Mar 21, 2018 |
Thanks for the insights NiyiOmoIyunade: |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:17am On Mar 21, 2018 |
DMerciful: Actually not that hard. Focus on system design especially ensuring consumption aligns with generation. This allows me to achieve a daily cycle of the batteries at about 38% dod. With a discharge rate of below 5Ah (C40) for over night i.e about 7 hours use and 9AH (C20) during the early evenings for about 4 - 5 hours when TV and indoor lights are on. Heavy loads like fridge, freezer, washing machine are used during the day thus ensuring the about 60Ah coming from my panels are used up as opportunity loads allowing a safe 22A go into the battery. The relative light battery depth also allows the battery a faster time to out of bulk and into absorption where current would be regulated. All this ensures the battery gets adequate and proper charge to float on a daily basis. The end result of all these is, 2 years on battery still works like new. 1 Like |
Re: Solar Energy, A Complement To FTA by ANEB(m): 12:49pm On Mar 21, 2018 |
My Journey into Renewable Energy. 2015! Yes 2015. That was the year I had to make a decisive and far reaching decision about the future of power generation and consumption in our "little" home. I approached my wife, (mind you, with caution) and my children to discuss this new project that could potentially reduce the astronomical cost of electricity (alas! In the future) in our "little" home. Solar power... using photovoltaic panels. Let me back up a little bit... My street and indeed my entire neighbourhood gets roughly 20 to 22 hours of electricity in a week and sometimes, we would be waiting for electricity from the power company for a month or two. Oftentimes it's a transformer fault, high tension pole(s) dropping off like a sparrow. In many occasions, old and tired lines giving way after screaming for replacement for ages. To cut the long story short, we are often without power for a long stretch of time. The only option had been to run the portable generator. And this... brothers and sisters cost a small fortune monthly. Ten litres of petrol is required for my household for twelve hours. Multiply that by thirty days and slot in 145 naira per litre... you begin to feel like a 150kg of load on your shoulder. 43,500 naira for only 12 hours of electricity to run basic appliances. If we were to fire the generator for 24 hours, the bill would be 87,000 naira in a month. Eighty seven thousand naira? That's crazy. Really crazy. Like my friend would say... not sustainable. And that was just the financial aspect. The noise, fire hazard and the anxiety of something going wrong while I was away and the family needed to power the house... no price tag for it all. Okay! Enough of the stories. We as a family, after weighing the pros and cons of the generator power... decided to embark on a solar power generation and consumption adventure. Being a DIY person, I set out on the design. Base on personal data collection, I came to the conclusion that my household basic appliances electricity requirements was about 18KWH for 24 hours. That's a huge amount of power to generate considering that Calabar falls under a 4.5hour full sunlight per day region. I decided to cut down on some load... replaced all the light bulbs with LED bulbs. And the load dropped to 15KWH in 24 hour usage. I believed modular design would work better for me. I set out to purchase the following equipment: 80amp charge controller (outback FM80.. though the seller sent me 60amp FM60. that was dubious of him) 5kva Ipower plus hybrid inverter... Zinox Luminous 3.5KVA inverter (existing from my previous inverter project) 16# 250Wp solar panels (later upgraded to 26# ) i.e. 6500Wp panels in total. 16# 200AH AGM batteries in 48v system (existing from my previous inverter project 4yrs old). Some cables. 16mm and 35mm for moving the huge current from combiner box to the charge controllers. Breakers as appropriate for the design. Constructed a stand for the solar panels (though some panels are roof mount) NOTE: Due to the peculiar nature of house, I had to make some concessions. Trading high angle 19° for a 3.5 hour shading from 2pm. I figured the losses would be less with high inclination compared to 3.5 hours of shading. We completed the installation and power generation has been better than expected. Challenges I have encountered so far... The Zinox Ipower plus inverter though very good has one draw back. It only absorbed on utility mode. When on solar... it jumps the absorption mode to floating mode. As such, I had to reduce the number of panels to Ipower plus inverter and put more panels on Outback charge controller. I maxed out in amps on the outback FM60. Future plans: Purchase additional Flex max Charge controller (FM80) Increase my panels to 9000Wp Find out more about batteries... possibly the batteries with 3000 or more cycles. Currently, we run 1.5hp borehole pump daily for 45minutes Microwave oven for 30minutes Other loads amount to 800Wp In 24hours, we take from the solar average of 19KWH. The system can do more but not enough good batteries yet to maximise it. Most of my knowledge came from this forum. So gentlemen and ladies (If there's) thank you for contributing everyday and finding time to respond to questions and challenges. You guys are the best. 10 Likes
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Re: Solar Energy, A Complement To FTA by pranil(m): 2:10pm On Mar 21, 2018 |
[img][/img] NiyiOmoIyunade: AVS30 is more than enough unless the voltage goes so low that Invertr drops it and refuses to charge batteries But please buy the genuine one the duplicated ones do not have setpoints and cheap relays and fail on heavy duty loads My Ipower 5 kva's have been running with twp AVS30 without any issues ( i see regularly 250/255V in Night during rainy days as the tarfo is lightly loaded )
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Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 2:26pm On Mar 21, 2018 |
rezzy: Yes, It can be DONE! Freezer :- 1200 WattHours/Day TV:- 150 watts decoder :- 20 watts bulb: 18watts max a piece These are all estimates for your load, reality may vary. www. konga. com /1-6kva-24v-sukam-pure-sinewave-inverter-3864046 Konga 1.6KVA sukam pure sine wave inverter : N90, 000 www. konga. com/100ah-inverter-battery-3802123 Konga 100ah lead acid battery N44,000 times 2 = N88,000 www. konga. com/12v-150w-polycrystalline-solar-panel-photovoltaic-3526250 Konga 150 watts poly panel N27,000 times 2 = N54,000 www. konga. com/talkers-solar-charge-controller-12v-24v-30a-pwm-dual-usb-port-2359716 Konga PWM 30A charge controller: N12,000 Total :- N244,000 Use the remaining money for Installation. When you have more money, you can increase panel size to max out the charge controller, then next change charge controller, then change batteries and so on as the money comes. This however, should serve you well with delicate use. Obviously, with such a small system, you'd need to monitor your loads, especially the freezer. Maybe run it only during the day, monitor your battery voltage and current draw like your life depends on it, good luck. Ask suppliers like kiekie here for competitive pricing. 5 Likes 1 Share |
Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 2:43pm On Mar 21, 2018 |
ANEB: Wow, wow wow wow wow wow! This is so dope, congrats yo! Yes, the weakest link in the whole solar system at present is the batteries. Too many unreliable ones and the great batteries with great chemistry are just soo pricey. Kudos on your system, even at 3 sun hours with 6500Wp, you'd still get anywhere between 16000wh and WOW! Nice one. 2 Likes 1 Share |
Re: Solar Energy, A Complement To FTA by jarkbauer: 3:39pm On Mar 21, 2018 |
dejidotun2000: Happened to me couple of times. "Fake" AVS worked. Fake AVS is about 5K in Arena. Genuine is about 20k in shoprite or Grand square. I set the minimum volt to 200 and max to 240. |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 4:39pm On Mar 21, 2018 |
Yes I agree that AVS30 is more than enough. This is what I recommended originally too before answering a separate related question about size of stabilizer. See my initial comments quoted just under yours pranil: NiyiOmoIyunade: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 4:50pm On Mar 21, 2018 |
You may have gotten lucky choosing to go with a 'fake' AVS or perhaps no high voltage has come since you installed it - at the minimum even if the voltage regulation part works, I regularly see the 'fake' units melt or burn with heavy loads applied though the loads are well under the rated 30Amps AC. One cannot really afford to compromise quality on a safety or protective device as the cost of any failures would almost certainly outweigh whatever savings one may have gained purchasing the cheap option vs. the quality option. See Oga Pranil's comments bolded below for further emphasis. pranil: jarkbauer: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 4:53pm On Mar 21, 2018 |
Re: Solar Energy, A Complement To FTA by makavele: 6:13pm On Mar 21, 2018 |
NiyiOmoIyunade: Oya chop knuckle |
Re: Solar Energy, A Complement To FTA by davodyguy: 9:00pm On Mar 21, 2018 |
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