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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 bigrovar(m): 8:06am On Sep 05, 2017 |
earthrealm: Like someone noted those batteries have been allowed to go below the safe zone over and over again for their own good. I also suspect that they have been left in a cycle of under charging for so long some might have lost the ability to do a full charge. fully agree with the suggestions from NiyiOmoIyunade 1 Like |
Re: Solar Energy, A Complement To FTA by dejidotun2000(m): 10:19am On Sep 05, 2017 |
I use Kung long , 150AH*2 . I have had it for about 8 months now. My inverter is set to shutdown at 23v (11.5v ), on very rare occasions - maybe about 6 times - has my inverter ever shut down. My load is usually less than 100 Watts and never more than 200 Watts for more than 6 so I am treating the battery quite gently. All in all, it still works. brightk: |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:21am On Sep 05, 2017 |
NiyiOmoIyunade:Totally agree with all the above except the part in bold. charging a battery with an absorption voltage over that recommended by the manufacturer will wear out the plates quicker. Remember you still have to factor in temperature compensation. I think the best thing is to design your offgrid system to be circled at around 30% depth of discharge. The advantage of doing this is 2 fold. 1 you stress the battery less hence prolong the usable life, 2 its easy to replace what was used from the battery if discharge is 30% of dod. In a place like Nigeria, The size of your battery discharge should closely align with the size of what generate from your panels. Again this is where efficient load comes in. An efficient load allows you discharge your battery at a rate where you can even get more from the battery than specified, and it allows you to do more with less. I have 2 Mercury tubular battery and this powers the whole house 24 hours a day (including raining season) yet the most I have discharged them is 45% dod. usual daily discharge cycle is at between 25-35% dod. This allows my battery to get to float every single day sine I started using them. My loads include a Deep freezer of 165L, a medium sized fridge all running from a minimum of 9-3 (during raining season) and 7-5 in the dry season. 42 inch led tv, home theater PC, and 1200w sound system, over 10 lighting points and 3 fans, occasional washing machine, blender. When you work on making your loads efficient (which is in the long run cheaper than generating elecricity) you will not struggle to charge your battery and solar would be enjoyable. 1 Like |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 10:59am On Sep 05, 2017 |
bigrovar:I agree with this if you have no daytime loads. The best design approach is going to be different for everyone. Some people use more of their loads during the day. Some others, at night. So the size of the "usable" battery bank and pv array cannot be directly matched. |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 11:06am On Sep 05, 2017 |
NiyiOmoIyunade: This is not true. My sukam falcon plus could take an equalization charge of 31v without issues and I used it for over a year before selling it off to get something bigger. The same is with the 3KVA+ inverter models 1 Like |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 11:09am On Sep 05, 2017 |
earthrealm:Bro, your system load is too much your PV. Try trimming down the light bulbs get 5w efficient LED bulbs, you can talk to JUO he has some insanely efficient led bulbs, get rechargeable fans.. it would reduce the 70w to about 15w and you can use 10w efficient light bulbs for the security lights 5 Likes |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 11:16am On Sep 05, 2017 |
mank1234: This is true.. the longer a refrigerator is on the less power it uses. Mine usually starts by using from about 150w and gradually settles to 100w in about an hour of use. The downside is nothing replaces using your fridge and freezers as opportunity loads when your array has enough power to charge your battery and left over would be used to power the hungry appliances like fridge and freezers. That way you power them with "Free energy" If you do not have that type of setup and also lack a timer, it might be best to leave freezer on at night. It would drain less energy during the day and also because generally house load tend to reduce once its bed time.. .ie TV and all indoor lights would have been off. It would help with the battery rate of discharge which would also be lesser. However I still tend to advise against it because it would still exert more load on your battery than it should handle. 1 Like |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 1:37pm On Sep 05, 2017 |
You may be right! GeorgeD1 said the same of his Fusion series inverter - I recall the ones I had all beeping alarms above 15v per 12v battery - again this was a long time ago so I could be wrong or there may be differences between them. With all these said even I may be looking to a Su-Kam type inverter for my replacement as it seems they are capable of withstanding equalization - their perceived inability to handle high voltages was the reason I never considered them for my replacement inverter in the first place. bigrovar: |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 1:50pm On Sep 05, 2017 |
NiyiOmoIyunade: Sukam inverters are rock solid. they are a bit unappreciated on this part mostly due to their low charge rate and uninspiring looks. The truth is in terms of durability, ruggedness and support, they put all the chinese inverters to shame. They are more efficient and more reliable. My 1.6kv had an idle load of 26w. They also have features that strikes out some of the premium brands. The only down side is the low charge rate which are often not more than 17A for the top end brand and 14A for the low end brand. 2 Likes |
Re: Solar Energy, A Complement To FTA by Dam5reey(m): 1:54pm On Sep 05, 2017 |
earthrealm: Hello boss, the highlighted was the issue... Seems your battery are dead already.. Your battery bank is about 11Kwh.. but you generate 3-4Kwh.. You may need to increase the PV X 2.. |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 2:08pm On Sep 05, 2017 |
Dam5reey:&bigrovar, whats the size of ur solar array?..i see u hv only 2 units 12v battery..and your load appears tobe even more than mine nice point gents. part of the problem was the fridge, hving a 130w energy nameplate, but clocking in at 190w on a wattmeter, it was while trouble shooting that i made that discovery...the extra 60w x 8.5hrs is over 500w lost daily, i initially tot my consumption was about os less than 2kwh, based on the 130w x 8hrs + the other small loads, thus with my 7kwh daily generation, i hv 5kwh to feed the battery bank. am considering this option of programming the fridge to run at night, thus hving all the energy produced during the day go towards charging the batts. has anyone tried this unconventional approach, i have 6 x 250watts 24v panels on a 60amp epsolar CC, i dont thinki can add an additional 500w to the panel bank, as that may exceed the rating of the CC, n upgrading the CC to 80amps isnt a viable option now..based on funds. will take the fridge offline for 3 - 5days and allow the batterys to be fully charged, may adopt this strategy at 2wk intervals till funds are available to do more/the weather improves. i also hv a desulphator hooked permanently to the system 1 Like |
Re: Solar Energy, A Complement To FTA by pranil(m): 2:55pm On Sep 05, 2017 |
earthrealm: Lead acid batteries should not be left in partial discharge for more than 24 hours to ensure long life ( the full charge cycle also included BULK ( full rated current) Absorb and then float if possible. ( Trojan Carbon is exception to this as it can handle partial SOC If the panels can barely top up the batteries over 6/8 hours then absorb cycle is missed and you will feel the reduced lifetime Which means for a typical day your batteries should at least exist bulk by 2 pm to remain on absorb for next 2-4 hours ( bulk is at C10 or C20 ) absorb currents are, much lower. Typically absorb is lower currents but at least 2- and max 5 times the bulk duration |
Re: Solar Energy, A Complement To FTA by idsolar(m): 3:28pm On Sep 05, 2017 |
For sale A new charge controller 12/24v 60a for sale. Call/whatsapp 08033735359 now |
Re: Solar Energy, A Complement To FTA by Nobody: 4:34pm On Sep 05, 2017 |
Thanks for your answers. Another question. Is there any way to disable battery charging on a Sukam inverter while retaining the automatic changeover switch when grid power is restored? |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:45pm On Sep 05, 2017 |
earthrealm: I have a 1.83kw array attached to the battery. The array are divided into 2. First array at 960w is facing true south and ground mounted. The second array is 880w and facing West and mounted on the roof. But arrays are connected to separate controllers and paralleled to the two batteries. The second array facing west allows me to at more advantage of the post 1pm sun at which point the south facing panel is no longer at pick. The opportunity loads of freezer and fridge ensures that the battery never gets beyond the limited bulk current of 27A. Rest is used up by the house. With the 2 batteries cycles at 30% did. They get to absorption by 11am even on an overcast day. On a very cloudy day it might be 2pm before hitting absorption. |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:47pm On Sep 05, 2017 |
dsunmade:Unfortunately you can't disble charging on the sukam. You can however reduce it to a tiny minimum of 2.4A which is what I used during the dry season. This setting is via a dip stick hence u can use it when inverter is off 1 Like |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 9:39pm On Sep 05, 2017 |
pranil: so reducing my bank to 2 batterys....do you think it would be a good move? |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 9:46pm On Sep 05, 2017 |
pranil: so thanks, am considering 3 options.or a combination of any 2 1. reduce batt bank to 2 units. 2. set timer to power fridge only at night [note, its usually the fridge 190w and 1 laptop+chargers totalling additional 100w that may be on during the day when fridge is on too]. 3. reduce fridge runtime to 5hrs daily in the 9am to 2pm time band wch would you advice i implement, or beta still recommend additional options, that doesnt require more expenditure of funds |
Re: Solar Energy, A Complement To FTA by tsmall(m): 4:47am On Sep 06, 2017 |
Schneider Conext XW+ Hybrid Inverter/Charger XW8548E 8.5KW 48DC Pure sine wave Former name: Xantrex. Price #1,450,000. 07033311179. Deji.
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Re: Solar Energy, A Complement To FTA by JUO(m): 5:42am On Sep 06, 2017 |
earthrealm:you can add 500w to it and it will work fine. In case you add 500w and it got burnt contact me for replacement but if nothing happens to the cc after one month you will give me 100k 2 Likes |
Re: Solar Energy, A Complement To FTA by JUO(m): 5:50am On Sep 06, 2017 |
earthrealm:none of these options are good for you. You must avoid powering your fridge with batteries by all means. Your best option is to add 500w solar and run your fridge from 8am-5pm. Thank me after 2 years 2 Likes |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 8:23am On Sep 06, 2017 |
JUO: HAHAHHAHAHAHAHAHAHAHAH!, in this buhari era, kai..this man no like me, though you have a point, max instantenous harvest i hv seen is 1290w and abt 41amps , so its likely the additional 2 x 250w panels will generate additional 10 to 13amps....since my placement isnt optimal. total 50 to 54amps, wch is still below the 60amps rating of the CC. would be very glad if i can revive these batteries, am hopeful i would. think most of the damage was done this present rainy season/bad weather, since in good weather i generate 7kwh, and use abt 2.5kwh daily, so within 3days, the excess 4.5kwh x 3 would try to keep the batt bank happy |
Re: Solar Energy, A Complement To FTA by Oshomo12(m): 9:12am On Sep 06, 2017 |
earthrealm: I pray u get those batteries back up and running. That's y most of my calculations I use maximum of 3hrs of insolation(when budget is tight), ordinarily, I use 2hrs. The reason is just for this period. The sun is not smiling this time. Add d 500w as pointed out by JUO. It will save u around this period next year, good luck. |
Re: Solar Energy, A Complement To FTA by pranil(m): 1:51pm On Sep 06, 2017 |
earthrealm: I second the addition of panels and not running fridge on batteries - The CC will never get cooked with the addition of Panels - the recent trend is to add between 1.1 to 1.5 times the rated current to cater for cloudy days In case additional harvest is generated the CC limits it's current to max rated - Only draw back is on really sunny days you are wasting the harvest Also if you run CC on the limit all the time you might shorten the life but I guess 5 years from Now you will have much bigger panels and CC based on the trend in the solar industry What is you might observe is also called clipping which is additional ripple but not serious issue unless you are using one of the sensitive european brands In my own House, I am using a Victron 150/45 amps on a solar bank of ( 2440 w- 305 x without any temperature warning Beware though except midnight classic if you exceed the VoC ( more panels in series) it is short cut to white smoke from CC ( the caps blow almost immediately ) 2 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:49pm On Sep 06, 2017 |
I agree with JUO and Pranil - your current array is 6*250W = 1500W. You have an EP Solar 60A CC and the label sticker on it indicates 1600W (24v) per the below; [img] https://www.dropbox.com/s/n219mp4yoq40mex/IMG-20160717-WA0003.jpg?dl=0 [/img] However, you can safely oversize your array up to something like LBatt * VmP [LBatt is Max Battery Charge Current the Controller can put out and VmP is the Voltage at Max Power Point under ideal conditions] - in your case you use a 24v system I think, so with your 60a EP Solar CC you can safely size up to a 60amps * 60volts = 3.6kw (assuming 2 24v nominal panels in series with 30v worst case voltage per panel under load - in reality VmP should be higher for a good panel) PV array -- a common sense limit is to stay at 2.4kw PV array for 24v -- I ran a 4.5kw array (48v setup) for at least one year on my EP solar without issues and even a little over 6kw for a while - the 500w you plan to add is within safe limits - if your CC breaks, I will give you a spare I have on hand for free but if it works you will owe me a round of drinks in addition to the 100k you already owe JUO The limit you must never cross is the PV voltage limit like Pranil said - crossing that you will definitely brick the CC. NB: CC fault tolerance with oversized arrays is naturally poorer e.g. normally you could reverse polarity within the controller rated PV array size without damage but if you were using more than rated PV array size anything more than 1.5times the rated PV wattage would destroy the CC under reverse polarity conditions. In any case a PV size over 3 times rated controller max wattage would very likely overwhelm the controller and release the magic smoke. So where the rated wattage was 1600w at 24v and max was around 3.6 to 4.3kw, I adviced a safe limit of 2.4kw . All these caveats are apart from the power loss/wasted power with unnecessarily oversized arrays. pranil: 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 4:04pm On Sep 06, 2017 |
pranil: You are very much on point ! My set up is similar to yours as my pv system is oversized without any issue .. Thanks for the other day .. Am very grateful Sir ! 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 4:06pm On Sep 06, 2017 |
NiyiOmoIyunade: Egbon, drop the mppt for me if you don't need it again , I will pick up when am around your hood .. Hope you are really enjoying your L16 USA flooded batteries et al 1 Like |
Re: Solar Energy, A Complement To FTA by pranil(m): 8:18pm On Sep 06, 2017 |
kiekie1: you are welcome. That was my first solar device 4 years back from 45 amps I now have 4 Charge controllers which can handel together 225 AMPS 1 Like |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 8:57pm On Sep 06, 2017 |
225amps mhen!!!! Oga Pranil. Most definitely you are the real McCoy. Twale Sir!!! pranil: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:02pm On Sep 06, 2017 |
Yes boss! The batteries are firing away very vigorously. We can always count on you for solid products and superfast delivery so long as 'alert don sound' for your account first. As for the CC, I already promised our man here, if he does not redeem it then we'll see... kiekie1: 4 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:17pm On Sep 06, 2017 |
@BigRovar. Yourself and GeorgeD1 have stoutly defended the reputation of your Su-Kams - in my own experience I rank them as 'okay' inverters - they don't excel in charging amps capacity and they lack ability to select different voltage algorithms for different battery types, I wouldn't confidently load them over 70% their rated capacity and everyone I know has visited service center at least once in a 5 year period. What is the final verdict? Are there some techniques or practices you follow to derive such good value from your Su-Kam inverters? Do you have some extra protections or limits set on your systems or add-on devices to supplement the base performance? bigrovar: |
Re: Solar Energy, A Complement To FTA by donmajor2: 11:44pm On Sep 06, 2017 |
brightk: I have used the Kunglong batteries for a client. They have been performing ok. I can tell you that they are good batteries |
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