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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2272206 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 makavele: 9:13am On Jul 21, 2018 |
Barezzi: The a/c in is already drawn from the main house DB a dedicated breaker before it reaches the 20a switch as a secondary disconnect, so thats enough protection. I actually thought of getting a miniature DB for the a/c out of things, but thats a story for another day. it would have been easier in the first location, as it is, the inverter was relocated to a more spacious spot, albeit far from the main house DB. so too much work to start joining and drawing load wires all the way. will be done but not in any of my plans for now. |
Re: Solar Energy, A Complement To FTA by makavele: 9:17am On Jul 21, 2018 |
S007: There is a breaker on negative inverter cable, affixed to the rack [ oh i forgot to snap the rack ] yes and one unit of HA02. Thats why I said I needed to order more before its too late. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:22am On Jul 21, 2018 |
makavele: Good morning Sir.. I can see all renewable materials supplied ready for action ![]() Contact me for Schneider SPD or MNSPD"if you are in a thunder prone Lekki area" ... We also supply industrial salt, copper earth cables, pure copper earth rods of any length/ft you wish to use . Smartcell global services, 081-350-31951 1 Like |
Re: Solar Energy, A Complement To FTA by makavele: 9:23am On Jul 21, 2018 |
pranil: The only wire I can see with my "novice" eyes coming out the opposite direction is the inverter negative cable . . . please clarify more and i,ll see if it is fix-worthy are you talking bout the blue and yellow wires (battery to bus bar cables) i doubt so. once again clarify, until then, peace out |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:27am On Jul 21, 2018 |
makavele: A unit of the 48vdc balancer can actually serve for your design if only you are a fan of looping extra 2.5mm cables ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by makavele: 9:28am On Jul 21, 2018 |
kiekie1: Good morning bossman, For now, i'll love to see how I can fix the leakage cos of kids who might be curious to touch even with warning signs glaringly displayed. my house is a 6 bedroom duplex so a central voltage stabilizer was necessary a long time ago. The breaker is a 100A rating, would increase to 250A as said and then we will chat privately, of course! How are you today? 2 Likes |
Re: Solar Energy, A Complement To FTA by makavele: 9:30am On Jul 21, 2018 |
kiekie1: Do you have a diagram you can share for the looping? Let me see if i can try 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:34am On Jul 21, 2018 |
makavele: I am very fine Sir! Nope a 100a "dcb/disconnect catridge" breaker is too small for a 4 to 6kw pure sinewave inverter design ![]() ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:36am On Jul 21, 2018 |
makavele: Yes its very effective too since you are on a 48v stringed 210a bank.. I will send you schematic here or via whatsapp as usual ! Cheer's |
Re: Solar Energy, A Complement To FTA by makavele: 9:39am On Jul 21, 2018 |
kiekie1: Correction: bank 1 is 48v 210ah bank 2 is 48v 200ah total bank: 48v 410ah |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:42am On Jul 21, 2018 |
makavele: Hmmn , on same inverter ? I didn't see clear pictures tho ! Are they different batt banks? If No, how did you integrate all .. Thanks 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:44am On Jul 21, 2018 |
S007: Haha ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by makavele: 9:45am On Jul 21, 2018 |
kiekie1: i had 24v 400ah bank on the microtek 2kva before convert to 48v 200ah used a dual battery bank selector can switch from bank a to b like hot knife through butter 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:49am On Jul 21, 2018 |
makavele: Okay lovely.. Independent battery banks as seen ! You simply need schematics for 48vdc balancer as said earlier .. Let's meet in the other room as usual ![]() |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 10:31am On Jul 21, 2018 |
How did you arrive at the bolded? 4kw/48Vdc *1.25 is around 100A. For 5kva inverters, 125A is the typical recommendation. kiekie1: 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:50am On Jul 21, 2018 |
Barezzi: Namesake free that matter abeg ![]() ![]() 2 Likes
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Re: Solar Energy, A Complement To FTA by Barezzi(m): 11:07am On Jul 21, 2018 |
![]() ![]() ![]() No wahala bro! How family? Make we jam for za oza room. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 11:46am On Jul 21, 2018 |
Barezzi: We bless God Sir.. I have been a lil down with fever but am feeling much better today after yesterday's drip ![]() ![]() ![]() ![]() |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 1:48pm On Jul 21, 2018 |
You are on point. But you refused to give credit to the inventor of this hack/workaround ![]() ![]() ![]() kiekie1: |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 1:58pm On Jul 21, 2018 |
The convention is to break/disconnect at the positive side of the battery cable, then you may use the negative side to pass a shunt to measure power in or out as required - adhering to this convention is especially good in a negative grounded system given the way DC current is thought to flow from positive to negative (speaks plenty English and waxes technical, philosophical and professorial all in one about the technicalities of negative grounding vs positive and allied matters ![]() ![]() ![]() Practically I don't see any danger at the DC nominal bus voltages you are working with but for the sake of compliance you may consider doing it the conventional way. Lovely work you have done with this install - it is a great aesthetic standard to aspire to and I will try to beat it in my next job ![]() makavele: |
Re: Solar Energy, A Complement To FTA by S007: 3:05pm On Jul 21, 2018 |
kiekie1: The DC circuit breaker should be sized based on the maximum current the installed inverter-battery cable can safely carry. Oga Pranil has reiterate this point several times. Breaker and cable requirents for a 5kva/24V inverter is different from the requirements for a 5kva/48V. I think the correct sequence should be as follows. 1. Determine the maximum current that will flow through the system during charging and inverting. The inverter manual will help with this. 2. Choose a cable with a CSA that will safely carry the maximum current. The more the distance between inverter and battery, the more the cable size. There are other considerations e.g conduit or open air installation etc. 3. Choose a breaker below the cable ampacity rating as determined in 2 above. 2 Likes |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 4:09pm On Jul 21, 2018 |
S007: Bro, dnt worry about all that theoretical explanations as its not new tho . we see so many DC 250a catridge disconnect in various installation designs for a reason and don't presume they are mistakes or the fuses don't blow up when you mistakenly misplace DC polarity ![]() ![]() ![]() ![]() 1 Like 1 Share
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Re: Solar Energy, A Complement To FTA by makavele: 4:12pm On Jul 21, 2018 |
NiyiOmoIyunade: Yes, but for custom reasons, I need the circuitry to remain active at a point, that's why I went with the low-side disconnect as against the conventional high-side disconnect. It was well thought out. Glad to see you appreciate the aesthetics. I appreciate it too. |
Re: Solar Energy, A Complement To FTA by S007: 7:02pm On Jul 21, 2018 |
kiekie1: Bro. I am not writing here for typing sake or to prove 'I too know'. You would have noticed I rarely make contributions. My explanation is not theory. This is pure practical. I have a 175amp DC breaker on my inverter panel which is a 48V DC system. On 24V version, I know the breaker size is 250Amp. The question is why did the manufacturer decide to put these sizes there? The breakers are not undersized, neither are they oversized. The number one reason is not Isolation. It is also not maintenance. If you try to find honest answers to this question, I am sure everything will become clear. I am a learner as long as I live. Cheers 5 Likes |
Re: Solar Energy, A Complement To FTA by mrsdaniel: 11:05pm On Jul 21, 2018 |
S007: Interesting! 1 Like |
Re: Solar Energy, A Complement To FTA by S007: 3:20am On Jul 22, 2018 |
mrsdaniel: It is clear you don't understand my message. This is not vain arguments. The reason why these rating of circuit breakers are put on inverters I do know. I have been in this field for close to three decades. Kiekie is not entirely wrong either. My inverter did not come with one pre-installed. I have an inverter panel of same brand that came with one. These are two different things and you have to select the right panel for your application. For your inverter, have you wondered why the manufacturer did not put 500A, 1000A or even 50A in there. Like you said, most Nigerians don't care about these things. Many inverters do not come with an inverter-battery DC breaker as part of the setup. It is an important part of the jigsaw puzzle. If it is a DIY, one has to determine the right one to put there. Putting the right one there means avoiding nuisance and unnecessary trips. It also means the CB will do it's job when required. I can tell you many people depends on threads like these for education and to make the right decision. Putting the right message there goes a long way in helping others. 12 Likes |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:18am On Jul 22, 2018 |
SolnergyPower: sorry for the late reply. the content on my blog are under the creative commons share and share alike. Feel free as long as your reference the source. |
Re: Solar Energy, A Complement To FTA by Wazari: 8:28am On Jul 22, 2018 |
Kiekie, the main reason you use a circuit breaker or fuse is to protect the conductors from overheating. The large breaker e.g 250A is used on some inverters because it has been determined that the circuitry within the inverter can safely handle that current. A breaker on an inverter is not intended to protect the cables attached to the inverter and should not be used as a benchmark to size any breaker attached to the battery bank. To size a circuit breaker for the battery, you only have to calculate the ampacity of the cables you are using and the maximum voltage you need to break. It has nothing to do with the inverter size. That said, you should make sure the cables are correctly sized for the inverter. 4 Likes |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 8:47am On Jul 22, 2018 |
mrsdaniel: Nice and simple summary.. Thanks & happy Sunday ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:06am On Jul 22, 2018 |
Wazari: Yes its nothing new as i expressed earlier .. To be candid,there are so many research links via Google for substantial knowledge as what works for A might not work for B diy'ist. . . I still maintain my stand about the above posted pics in which we have different types of inverters with various types of DCB amperage.He might be digging facts from what came with a USA magnum panel"175a" whilst a modest chinese spec will use 200a in same application for reasons best known to them! Mrs Daniel made a general point about the Nigerian context and it applies to where do one get 175a DCB unless if ordered specially which most don't really care and use the available close alternative 200-250a in the open market.These are DC breakers we are talking about and nobody will advice you do a wrong connection for practical sake even though my cyberpower has 1but most inverters in the open market don't have . Magnum 4348 dosnt have unless you get the mount panel. Hope you know how many pages we have thrashed on same forum even with controversial arguments here & there but most still repeat by saying "its bulky and they can't go through all" Nobody is misleading anybody unless you wanna get mislead .. Cheer's ! 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:13am On Jul 22, 2018 |
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Re: Solar Energy, A Complement To FTA by OnePunchMan: 9:31am On Jul 22, 2018 |
Always available to order your solar energy equipments on amazon at just 310/$... contact in profile Nd a link to my main thread too.. |
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