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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2323871 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 Oshomo12(m): 1:13pm On Oct 10, 2017 |
Valto: Upload the specs of the two panels, stating all voltages and the currents u see at back of the panels. |
Re: Solar Energy, A Complement To FTA by pranil(m): 1:20pm On Oct 10, 2017 |
efuro: The batteries like to be charged C10 (max .13C) normally ( so for 100 AH it is 12 amps only). The battery will get killed faster due to high temperatures during charging. better add one more battery in parallel at the earliest |
Re: Solar Energy, A Complement To FTA by Valto(m): 3:02pm On Oct 10, 2017 |
Oshomo12:i cant get the pix of the 150w for now
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Re: Solar Energy, A Complement To FTA by makavele: 4:08pm On Oct 10, 2017 |
pranil: pls explain better! i can see the PV is delivering 25-29 amp on the LCD |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 5:37pm On Oct 10, 2017 |
makavele: That indicates your 100AH battery will be back to fully Charged within an hour you need to add another 100Ah in parrallel for better backup and DOD By the way what type of Battery are you using? My Battery is fully Charged at 12.7 to 12.8, how come you Having 12.6 after 300+ Wh : on 100AH battery? |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 5:48pm On Oct 10, 2017 |
Valto: Sell the 150W and buy 2 200W 24 volts panel my 2 cent, I think I posted how to add mismatched panels sometimes ago 1 Like |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 5:52pm On Oct 10, 2017 |
Valto: Ok, but the spec of the 150w is important before one can advice on the connection config/buying of the one panel needed. Secondly, what is the max voltage for your Mppt controller? |
Re: Solar Energy, A Complement To FTA by makavele: 5:55pm On Oct 10, 2017 |
Dam5reey: i will snap the battery specs when i get home but at dusk when fully charged and PV is no longer delivering current, it starts from 13.6v I’ve checked multiple times: 100% charge: 13.6v |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 5:56pm On Oct 10, 2017 |
Dam5reey: This is the most preferred wayout anyway. It's saves one lots of headache. |
Re: Solar Energy, A Complement To FTA by anidat77(m): 7:08pm On Oct 10, 2017 |
Enjoying my system even as phed transformer is down for a week now. My house is now a phone charging emergency center for my neighbours. This is the real "I PASS MY NEIGHBOUR" 2 Likes
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Re: Solar Energy, A Complement To FTA by Valto(m): 7:28pm On Oct 10, 2017 |
Oshomo12:100v |
Re: Solar Energy, A Complement To FTA by Valto(m): 7:29pm On Oct 10, 2017 |
Dam5reey:limited funds and secondly no one around to buy the 150w |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 5:12am On Oct 11, 2017 |
Can you send a photo of the nameplate of the 150w panel ? Valto: |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 8:41am On Oct 11, 2017 |
Valto: It's simple if the Vmp on the 150w is 18v, get another 150W that matches 18V Connect in series to make Vmp 36v.. you can then connect in series with the existing 2, 200w provided your cc can take 150V... If not no other way ...... |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:40am On Oct 11, 2017 |
pranil: This is figure is through for flooded batteries and gel batteries but that figure does not always apply to AGM which are capable for relatively high charge and discharge rate. Some AGM batteries can take up to 30% of rated amp hours has charge rate. 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 11:01am On Oct 11, 2017 |
Dam5reey: not exactly true. The charge process of lead acid batteries is not linear. a 100AH battery at 90% full and being charged from a source capable of 30AH might still take 3-4 hours to be fully charged. This is due to the charging stages for batteries. at 90% full, battery's internal resistance builds and the charger has to increase charge voltage and tapper down on the charge current.. this stage of the charging process (non an absorption stage) is the most inefficient and even if your PV are producing more power, the charge controller steps down what is going to the battery and the rest becomes energy potentials of your panels. I have 2 220AH 12 flooded acid batteries connected in series of 24v while my solar panels are 1.84kw in size, this means at pick and under right conditions my PV can produce above 60A (about 30% of battery amp hour ratings) which could do serious damage to my flooded batteries. I resolved this by balancing things with opportunity loads. The fridge, freezer, Home entertainment systems occasional washing machine, Microwave, all conspire to ensure that not more than 27A enters the battery during bulk stage. These arrangement also allows me to be completely offgrid on afternoons from Jan -Dec (minus July and August). The gross panel over size comes in handle on a cloudy day. It ensures that bad as e bad, my battery gets to float always 5 Likes |
Re: Solar Energy, A Complement To FTA by darocha1: 11:46am On Oct 11, 2017 |
Ember Sales is here again!!!
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Re: Solar Energy, A Complement To FTA by Dam5reey(m): 3:36pm On Oct 11, 2017 |
bigrovar: I understand those stages... That's why I asked what type is the battery.. Cos not all controllers are intelligent enough.. to complete this stages effectively.. |
Re: Solar Energy, A Complement To FTA by makavele: 4:22pm On Oct 11, 2017 |
Dam5reey: Hmmm, ayam not understanding all these grammar .. let me snap the battery specs . . and wait for advise from there . . . Mr Z, i know your installation is perfect, just trying to learn 1 or 2 thing in case of future DIY or if you re out of reach (especially, as as you r now),lol |
Re: Solar Energy, A Complement To FTA by makavele: 4:27pm On Oct 11, 2017 |
,,,
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Re: Solar Energy, A Complement To FTA by Obimind1: 4:36pm On Oct 11, 2017 |
bigrovar:What type of charge controller are you using? If its an mppt what's the capacity (is it a 60a, 45a or 30a.) I'm asking bcus ur set up is similar to mine which is a 24v set up. The only difference is that my two batteries are 200ah each while urs is 220ah. My PV strength is 1.2kw (8pieces of 150watts panel) while urs is 1.8kw. If I should add 2 more(150 watts panels) to give me 1.5kw does it mean that my batteries will be at risk during peak Sun hours? |
Re: Solar Energy, A Complement To FTA by Obimind1: 5:08pm On Oct 11, 2017 |
Its been over a month now, I lost my batteries and my charge controller(60ah mppt) all at the same time under 8months of usage. It was a tough time for me though, but the truth was that I had no one to run to. I managed to get a set of new batteries which will clock one month on the 19th of this month. I also had to fall back to my 30ah and 20ah pwm charge controller which I dumped sometime ago. Now this are my findings: I noticed that my pwm seem to have an effective cut off strength compared to my mppt cc. My pwm does not exceed 28.2v at peak Sun periods and even when I'm charging my batteries with national grid power(Phcn), but when I was using my mppt I noticed that at peak periods my cc voltage rises up to 30v and every 28 day of the month it shows that its equalizing at this point my battery voltage rises to 32v during peak Sun hours. To cut the long story short I lost my batteries and my precious 60ah mppt cc under eight months. My charge controller started showing (battery OVD). Now I'm starting all over again. I must say I learnt my lessons the hard way. Had I known I would have maintained my pwm which I was using conveniently for over a year b4 going mppt. If I am to go the mppt way again, I have to do a lot of research to know what capacity of mppt cc will be efficient for my 24v set up. |
Re: Solar Energy, A Complement To FTA by pranil(m): 5:19pm On Oct 11, 2017 |
makavele: The amps are directly there Initial Current Not more than 30 Amp - Please note that that current is also for battries at 25 DEG C> if hotter the current should be reduced ( most of the advanced inverters and charge controller do temperature compensation ) Quote directly from Victron AGM datasheet - During the bulk phase the current is kept at a constant and often high level, even after the gassing voltage (14,34V for a 12V battery) has been exceeded. This can lead to excessive gas pressure in the battery. Some gas will escape through the safety valves, reducing service life 15. Charge current The charge current should preferably not exceed 0,2C (20A for a 100Ah battery).The temperature of a battery will increase by more than 10°C if the charge current exceeds 0,2C. Therefore temperature compensation is required if the charge current exceeds 0,2C. https://www.victronenergy.com/upload/documents/Datasheet-GEL-and-AGM-Batteries-EN.pdf You can try to lookup your battery supplier datasheet to check correct values 1 Like |
Re: Solar Energy, A Complement To FTA by dezo(m): 5:25pm On Oct 11, 2017 |
Janyves:Is it still available? |
Re: Solar Energy, A Complement To FTA by makavele: 6:20pm On Oct 11, 2017 |
True i just it saw, well Thankfully i have not seen the PV exceed 29A on a bright day. Maybe I am not yet to see very bright and sunny day. I will definitely get another 100Ah and connect in parallel Question is should i get the same brand? Or can i get a different brand! Can i get a 200ah and hook as parallel? |
Re: Solar Energy, A Complement To FTA by oluwoleode: 7:24pm On Oct 11, 2017 |
anidat77: Nice set up What do you use to monitor this on mobile. and your array for your 40amp charge controller is tempting. |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:48pm On Oct 11, 2017 |
Obimind1:Am actually using 2 charge controllers and their output is paralleled to the 2 batteries. Each controller is connected to an array panels. Array 1 (960w) is on a ground mount optimally facing south connected to a Fangpusun 45A mppt controller, array 2 (880w) is on the roof facing south west connected to a 100A Fangpusun mppt controller. The system is designed this way to ensure both Pv pick at different times which helps to ensure battery don't get over charged during bulk. It also allows me to diversify access to the sun due to shading which occurs around Oct and Jan every year. Lastly the south facing array allows me to time more from the late afternoon sun. |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:53pm On Oct 11, 2017 |
makavele:You should be fine for the most part. At most u can always use up the excess charge current from the controller through opportunity loads in the house. A ceiling fan and TV should bring the charge current down to safe levels for your battery. As Pranil suggested. You might want to stick to 20A as your charge set point. The battery from all indication seems to be AGM. |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:04pm On Oct 11, 2017 |
Obimind1: What type of battery are u using. The voltage from the mppt controller is quite high. Even for a flooded acid battery.. (and those can take a beating) 30v at absorption is just too much. The important thing is to buy controllers that allows you regulate charge voltage or one which has preset charge voltage profile which covers the field. Batteries are the Achilles hill of renewable and you have to handle them with care. |
Re: Solar Energy, A Complement To FTA by makavele: 8:40pm On Oct 11, 2017 |
bigrovar: Okay thanks One thing i noticed this afternoon, if left idle, PV supplies between 25-29A. No more than 29.1A But connected to a few loads; it reduces to about 18A or so! |
Re: Solar Energy, A Complement To FTA by Obimind1: 9:20pm On Oct 11, 2017 |
bigrovar:The batteries that went bad were Gel batteries, but presently my batteries are AGM. |
Re: Solar Energy, A Complement To FTA by efuro(m): 10:09pm On Oct 11, 2017 |
Obimind1: It is painful to loss over 250k to ba3 & CC in just 8 months. Ba3 equalizing @ 32v for too long is suicidal for ba3 that are not dead. Had I known I would have maintained my pwm which I was using conveniently for over a year b4 going mppt. Don't be discouraged with mppt. Is ur mppt CC under 2yr warranty? That is why I like buying from forum members, you can always redeem ur warranty as fellow mates. Best wishes! |
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