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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2273325 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 nonoski: 4:48pm On Apr 13, 2018 |
I took time to take readings from the existing four batteries before connecting the ZHC Battery equalizer, duh they weren't charged but here are the readings Battery 1 - 12.2v Battery 2 - 12.2v Battery 3 - 12.2v Battery 4 - 10.2v ![]() Connected in series 47v I think I may need to discard one of the battery (battery 4). |
Re: Solar Energy, A Complement To FTA by pranil(m): 5:00pm On Apr 13, 2018 |
abunafiu2: Suppliers like Canadian solar ( and Gennex with them) are setting a good path by arranging training for the industry players NAPTIN also has launched courses focused on Solar which is bound to grow So I believe knowledge will grow in the industry day by day but the products are where the problem lies. What is needed in my opinion is net metering to be legally acknowledged along with grid code for off-grid installation by NERC for systems above 5 KWp As the best practices and components get used more the top-down effect will overtime sanitize industry. There will always be some bad apples like in all industries 1 Like |
Re: Solar Energy, A Complement To FTA by cretin: 5:22pm On Apr 13, 2018 |
nonoski: fully charged at 12.2v?. something is wrong, you may be lucky and its the bad batt of 10.2v affecting the system. are they fla or agm batts? |
Re: Solar Energy, A Complement To FTA by nonoski: 5:48pm On Apr 13, 2018 |
cretin: Sorry I have modified my comment, I meant they weren't charged. They are VRLA Valve Regular Lead Acid battery according to the manufacturer
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Re: Solar Energy, A Complement To FTA by nonoski: 6:50pm On Apr 13, 2018 |
Lol ![]() Why was the comment above me hidden? Abi the person don commit |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:11pm On Apr 13, 2018 |
abunafiu2: Hello Bro, Good observation I must say ! You know how corrupt the Nigerian system of govt is , I believe we shall get there someday . I have also had some bitter experiences even with known Indian battery brands which can be so frustrating when the said battery is "still under warranty" . You discussed same with me few days ago that's why some of us choose some brands to market over others . A lot of us know most of these premium brands are very expensive but not withstanding,when abused - it dies prematurely ! I see clients who request for cheaper battery brands "Access, GBM, Otral" etc bearing in mind that most of these batteries don't last above a year or 2 ![]() A lot of substandard goods floats around in the open market. I have reasonable num of importers i dialogue with and I also feel their pains when you try maintaining good quality and the substandard alternate sells more . Quality drops daily and the standard organization of Nigeria(SON) still exists , yet does nothing ! We shall get there someday ! Its well 3 Likes |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:14pm On Apr 13, 2018 |
GeorgeD1: Chief, Trust you are doing great. You said it all ! Seconded !! 1 Like |
Re: Solar Energy, A Complement To FTA by TSHIRT2: 11:17pm On Apr 13, 2018 |
Sometimes names do it and sometimes they don't, personally I bought access brand of battery in April 2015 and as I write this, it's still doing wonders without any signs of weakness. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 11:47pm On Apr 13, 2018 |
TSHIRT2: Yes you are right especially when you bought a good quality which came with a particular consignment/stock. I saw a brief post on sunshine panel quality comparison by mcTrinity which is still in line with our discussion . |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 9:07am On Apr 14, 2018 |
dejidotun2000: |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:52am On Apr 14, 2018 |
PRAG product's updated prices loading........ Stay tuned ! Contact: Smartcell global services 081-350-31951 |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:53am On Apr 14, 2018 |
dejidotun2000: Hello, what you are seeking for is rare .. I assume your current inverter dosnt charge ,why not sell the old 12v inverter unit and simply get a 12v 1000w or 2000w power inverter with inbuilt 50-70a adjustable intelligent charging feature ranging within 85-110k ! You can contact me if interested Smartcell global services 081-350-31951 |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 5:12pm On Apr 14, 2018 |
My sunshine panel generation from 2016 till 2018....protective diodes keep increasing. 1diode early 2016, 2 diode mid 2016, 3 diodes 2018. All cables are copper however I think mcTrinity is spot on wrt the substandards that abound. Just imagine within 2yrs there are 3 different connection box for sunshine panels.... same 250w mono
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Re: Solar Energy, A Complement To FTA by sinistrian(m): 5:19pm On Apr 14, 2018 |
nonoski:The post was mine. Dont know why it was hidden. And this is the third time. |
Re: Solar Energy, A Complement To FTA by makawhy201: 5:38pm On Apr 14, 2018 |
i checked my new sunshine 200w panel connection box to see if its on point or not and realize it has 9 diode as Dmerciful, when i start my next upgrade i i will check the old ones to see d difference. DMerciful: 2 Likes
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Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 7:15pm On Apr 14, 2018 |
Thanks. Will contact you backstage. kiekie1: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 7:30pm On Apr 14, 2018 |
I tried to post this yesterday but apparently the NairaLand Gremlin banned me. If it's not too late then here goes. ================================================ Please charge each battery individually to full charge before you place them together in series otherwise all your efforts may be undone by the inevitable imbalances that will come up between the series connected batteries over time - especially as you have a battery reading 10.2v in the bank. Series connected batteries require each battery to fill up and be emptied in as perfect sync as possible otherwise any discrepancies in capacity will only get worse with time as the stronger batteriee get overcharged and the weak batteries undercharged, overdrained and sulphated. The fact that two batteries are reading 12.2v does not mean they are at thesame state of charge. Sure your ZHC balancer would help but it is not a substitute for doing things the right way and in your case an individual full charge for each battery is the best way to begin. I read earlier that you want to add more batteries soon? Perhaps you should wait a little and not mix old and new batteries and especially also to reach a final verdict on the fate of the battery reading 10.2v nonoski: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:01pm On Apr 14, 2018 |
Dear KieKie, I have measured a max charging amperage of 40-45a on the 1.5kw 12v VilPower.... depending on battery DoD. Have you confirmed if the 2kw 12v units take charging up to 50-70amps as you say? kiekie1: 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:16pm On Apr 14, 2018 |
NiyiOmoIyunade: Yes it depends on battery DOD as you stated .. Trust your powerstar inverter systems are all doing great ![]() |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 1:51pm On Apr 15, 2018 |
Oga KieKie I will wait for hard evidence to confirm if the 12v 2kw units get up to 50-70a. All my checking for the units I have access to max out at 45a. It would be interesting what one could do with a 12v 70a charging source - I might just replace a large series connected battery bank with parallel connections and use the 2kw units as the main charge source. With 12v parallel connections, I largely eliminate the issue of batteries going out of sync with each other. kiekie1: 1 Like |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 2:45pm On Apr 15, 2018 |
Battery going out of sync is the biggest challenge to series batteries. I am changing the configuration of a client system to 12v bcoz of this. For me the max system voltage should be 24v..best is 12v. NiyiOmoIyunade: |
Re: Solar Energy, A Complement To FTA by GeorgeD1(m): 3:12pm On Apr 15, 2018 |
hello niyi, pranil, chris81964, dmerciful, et al, so i've been doing some thinking around this whole lithium battery thing and i'm still struggling to see how present day costs justify the whole excitement it seems to be generating. take a typical scenario: a 3.5kwh 48v simpliphi power lithium ferro phosphate (lfp) battery costs about 1,550,000 naira on a popular solar website (names withheld). using our usual piv power calculation, this translates to 72.9ah at 48v. if i want to make up a bank of 780ah like i have presently, i will need about 10 units of this lithium battery making 72.9ah x 10 or 729ah at 48v or 35kwh. this will set me back a whopping 15.5million naira! even if i decide to do the smart thing and aim for 100% dod, i can only reduce this cost by half but that will still be unacceptable at 7.25million just for batteries. now flip this around and lets do the maths for traditional lead-acid agm batteries. again, i want to build a bank of 780ah batteries and i decide to visit yet another popular solar website. i get trojan solar agm battery 12v 205ah for about 185k each. i would need at least 16 units to reach my bank size goal. adding up at 48v this translates to a total 820ah. which is 39.360kwh (playing up the lithium trick) and at a cost of 2.96million. at a glance this is less than one-fifth of the cost for lithium with a significantly higher storage. from a purely economic view point, it wouldn't make sense for me to ditch traditional lead-acid in favour of lithium when i can get more for less. besides the phantom dod cycles, its lighter weight plus the fact that you can bypass the usual bulk-absorb-float stages, what other features does lithium has going in its favor to justify such humongous investment? 5 Likes |
Re: Solar Energy, A Complement To FTA by chris81964(m): 3:41pm On Apr 15, 2018 |
GeorgeD1:The Simpliphi battery is an anomaly. You can find batteries that cost substantially less. The BYD might be the best bang for the buck. Advantages 1. I don't need to oversize. 2. I don't need to Eq 3. No need to fully charge daily or any other time 4. 90% recharge within 90 minutes 5. No smells 6. No maintenance 7. Can use up to 90% of battery capacity 8. Cycle life up to 20 x better 9. Smaller space I can go on and on 4 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:56pm On Apr 15, 2018 |
I agree with you Sir. That is why although I take a keen interest in any news about Lithium batteries, I am still on the fence and have yet to use/embrace it on account of the associated complexities of BMS and avoiding overcharge and keeping batteries balanced and in sync and the effects of temperature on battery performance e.t.c With the high initial purchase costs, the price of failure or mistakes or system mismatch would be very high indeed and I cannot in good conscience use my clients to learn unless I am sure I have a full grasp of the technology and what will work. Above all, I am yet to see any field experience locally in Nigeria to justify the ultra long 10 to 40 years of cycle life that Lithium users lay claim too - not saying it's untrue but I need hard evidence/testimonials rather than manufacturer marketing claims to be convinced. GeorgeD1: |
Re: Solar Energy, A Complement To FTA by durumibaka(m): 4:57pm On Apr 15, 2018 |
good day, pls I want to knw d difference between 2v or 6v 200Ah or 500Ah and 12v 200Ah, 300 and 500Ah batteries... |
Re: Solar Energy, A Complement To FTA by DMerciful(m): 7:41pm On Apr 15, 2018 |
Almost all LiFePO4 cells comes from China including those sold in US.... If you want to get lithium at a decent price then premium China brand is the way to go. Currently lithium is about same price as lead acid if you do a total comparison. Infact Lithium Titanate is d way to go... Dapsyra has given insight to this awesome technology chris81964: |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 8:55pm On Apr 15, 2018 |
GeorgeD1: similar reason people buy supercars of $2m and above, when a range rover of under $100k can serve the same purpose ![]() ![]() |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 8:01am On Apr 16, 2018 |
@GeorgeD1, If i remember correctly, the conversion is not 1:1 It's more like 3:1 A 300Ah Lead Acid (LA) battery bank is roughly equivalent to a 100Ah Lithium bank. Your current LA capacity is roughly equivalent to a 260Ah Lithium bank... about N6m using your example. Remember that your 780Ah bank has a usable capacity of 390Ah. A 300Ah Lithium equivalent should give you better value. Correct me if i'm wrong @chris81964/dapsyra, you can grow your Lithium bank gradually. Start with 100Ah, and grow to 300Ah at anytime. Unlike LA where one is limited to a max 3-month window to add new batteries. 2 Likes |
Re: Solar Energy, A Complement To FTA by tivta(m): 8:36am On Apr 16, 2018 |
earthrealm: that is a very bad comparison, you can never compare lithium to lead acid, the long life and super fast charging is far from being luxurious. this is especially true in a temperate climate like ours with mostly cloudy days. 4 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 8:55am On Apr 16, 2018 |
I think Oga GeorgeD tried to account for the differences in AH capacity requirements between Lithium vs. Lead Acid - he derated the Lithium AH requirement vs Lead Acid by 50% - only issue Oga Chris pointed out was that he chose SimpliPhi as his Lithium battery representative case which he deemed too expensive and non-representative of the average Lithium price. It appears you want to derate the AH for Lead Acid vs Lithium comparison by a factor of 2/3rds and I assume this makes sense for a max daily 30% DoD scenario for a Lead Acid battery to achieve maximum cycle life. Oga GeorgeD appears to prefer a max daily 50% DoD assumption which is in line with what most people can practically afford to do. For the point about cascading from 100Ah and adding on capacity for Lithium my first thoughts were that the Lithium cycle life is not infinite, cells do degrade depending on the Lithium technology and especially if you cross the low voltage disconnect threshold. Keeping all cells balanced may become an issue if you start mixing and matching different aged/used cells. In any case the older cells should still conk out earlier than your later additions say 1 or 2 years down the road I presume. One thing that also came out to me was that given a series of low sun cloudy days with poor solar yield where I get only 4kwh daily and no help from the grid, I can flog my 800Ah Lead Acid bank 15Kwh between sunset and sunup for 3 days straight without service interruption whereas Oga Dapsyra with his 400Ah LTO acquired for maybe three times the price of my Lead Acid would probably conk out by the end of day two except he throttles back his consumption. ![]() ![]() ![]() Granted this is an hypothetical scenario and Oga Dapsyra would recover with no performance depreciation whereas I may suffer some slight capacity loss but I couldn't just help gloating a little there ![]() ![]() ![]() PS: Because I have access to a variety of 12v chargers, I have been called twice now to help restore Lithium batteries which had or were failing. I politely declined because the owners refused to allow me disconnect the BMS (after I saw all the complex wiring and connections) and charge directly and as well I did not want to grapple with something I had not fully mastered. The point I am making is that Lithium batteries are not invincible - care has to be taken in selecting an appropriate battery technology to use for any scenario especially so given their steep purchase price. Barezzi: 1 Like |
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