Solar Energy, A Complement To FTA - Satellite TV Technology (419) - Nairaland
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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 makavele: 9:41pm On Jun 18, 2018 |
Vested: no wonder the batteries died . roy solar on top 4 x 200ah battery hmmm 1 Like |
| Re: Solar Energy, A Complement To FTA by mank1234(m): 10:28pm On Jun 18, 2018 |
sharks776: As panel heats up, Pmax reduces directly with temperature rise even when sun intensity is same. Temperature coefficient of the two panels may be different and may account for the differences. Run the test as soon as sun comes out after rainfall. 1 Like |
| Re: Solar Energy, A Complement To FTA by BRIGHTSOLAR(m): 6:12am On Jun 19, 2018 |
DROPSHIPPING AND ONLINE DELIVERY OF RENEWABLE ENERGY MATERIALS INVERTER MICROTECH INVERTER 900VA,12V N46,000 1.1KVA,12V N53,000 1.6KVA/24V N72,000 2KVA/24V N80,000 2.6KVA/36V N105,000 3.6KVA/48V N170,000 5.2KVA/48V N340,000. 5.5KVA/96V N340,000 10KVA/180V N790,000 PRAG INVERTER 1.1KVA,12V N70,000 1.2KVA,12V N90,000 1.5KVA/24V N110,000 2.5KVA/24V N125,000 3KVA/24V N170,000 4KVA/48V N320,000. 5KVA/96V N300,000 7.5KVA/120V N500,000 710KVA/180V N600,000 KELVIN INVERTER 2.5KVA/36V N125,000 2.5KVA/48V N125,000 3 KVA/48V N170,000 5KVA/48V N340,000. 5KVA/96V N290,000 7.5KVA/120V N550,000 10KVA/180V N750,000 MUST POWER STAR INVERTER 4kva 3000W 24V N 220,000 4kva 3000W 48V N 260,000 5kva 4000W 48V N 350,000 6kva 5000W 48V N 400,000 7.5kva 6000W 48V N 450,000 HYBRID INVERTER VOLTRON SERIES 1.4KVA/12(30A N65,000 2.4KVA/24V50A N97,000 3KVA /48V 60A MPPT N220,000 5KVA /48V 60A MPPT N310,000 7.5KVA /48V 60A MPPT N430,000 10KVA /48V 100A MPPT N750,000 15KVA /48V 60A MPPT N850,000 15KVA /48V 120A MPPT N890,000 BATTERY LONG BATTERY LONG BATTERY 12V/100AH N 67,000 LONG BATTERY 12V/150AH N 100,000 LONG BATTERY 12V/200AH N 120,000 MONBAT SLIM BATTERY MONBAT BATTERY 12V/100AH N 75,000 MONBAT BATTERY 12V/200AH N 125,000 MONBAT BATTERY 12V/210AH N 120,000 ELSON BATTERY ELSON BATTERY 12V/200AH N 115,000 MICROTEC BATTERY MICROTEC BATTERY 12V/200AH N 105,000 EASTMAN BATTERY EASTMAN 12V/200AH TALL TUBULAR BATTERY N110,000 EASTMAN 12V/200AH TALL TUBULAR GEL BATTERY N115,000 GLT BATTERY GLT BATTERY 12V/100AH N 45,000 GLT BATTERY 12V/150AH N 65,000 GLT BATTERY 12V/200AH N 90,000 ZEEDIX BATTERY ZEEDIX BATTERY 12V/100AH N 45,000 ZEEDIX BATTERY 12V/150AH N 70,000 ZEEDIX BATTERY 12V/200AH N 90,000 RITAR/COWIN BATTERY RITAR BATTERY 12V/100AH N 62,000 RITAR BATTERY 12V/150AH N 90,000 RITAR BATTERY 12V/200AH N 125,000 PRAG BATTERY PRAG BATTERY 12V/200AH N 140,000 PATTERN BATTERY PATTERN BATTERY 12V/200AH N105,000 QUANTA BATTERY QUANTA BATTERY 12V/100AH N 70,000 QUANTA BATTERY 12V/150AH N 98,000 QUANTA BATTERY 12V/200AH N 125,000 BATTERY RACK BATTERY RACK 2 BATTERY N 15,000 BATTERY RACK 4 BATTERIES N 30,000 BATTERY RACK 8 BATTERIES N 50,000 CHARGE CONTROLLER ROY SOLAR SERIES 20A 12/24V PWM CONTROLLER N 20,000 30A 12/24V PWM CONTROLLER N 25,000 40A 48v PWM controller (LED) N 50,000 30A 96v PWM controller (LCD) N 120,000 60A 48v PWM controller (LCD) N 95,000 COWIN SERIES 20A 12/24V PWM CONTROLLER N 15,000 30A 12/24V PWM CONTROLLER N 20,000 40A 12/24V PWM CONTROLLER N 25,000 50A 12/24V PWM CONTROLLER N 32,000 60A 12/24V PWM CONTROLLER N 41,000 40A 48v PWM controller (LED) N 25,000 50A 48v PWM controller (LED) N 32,000 60A 48v PWM controller (LED) N 50,000 COWIN MPPT SERIES 40A 12/24/48v MPPT controller (LCD) N 80,000 60A 12/24/48V MPPT controller (LCD) N 130,000 EPEVER MPPT SERIES 12/24/48 /45A N 145,000 12/24/48 /60A N165,000 FANGUNPSUN MPPT SERIES 30A 24V N40,000 60A 48v N150,000 70A 48v N170,000 80A 48v N180,000 SOLAR PANELS JOY SOLAR PANEL 150w MONO -N32,000 200w MONO -N33,000 260w MONO -N54,000 320w MONO -N73,000 TRINA SOLAR PANEL 300w MONO -N85,000 320w MONO -N110,000 YINGLIN SOLAR PANEL 100w POLY -N22,000 150w POLY -N33,000 200w POLY -N39,000 260w POLY -N51,000 310w POLY -N62,000 100w MONO-N25,000 150w MONO -N33,000 200w MONO -N39,000 260w MONO -N59,000 320w MONO -N74,000 CANADIAN SOLAR PANEL MONO- 290w. N60,000 330w. N66,000 POLY 270w. N45,000 275w. N59,000 ACCESSORIES PROGRAMMABLE Digital timer 15A N7,000 PROGRAMMABLE Digital timer 25A N9,000 BATTERY BA LANCER HA02 48V 35K DC CIRCUIT BREAKER 63A/120V---500V 2 POLE N 8,000 DC CIRCUIT BREAKER 125A/500V 2 POLE N 14,000 COMPLETE SOLAR SOLUTION Call-07058562938 Bright Solar Power WHATSSAP 08187995847 FOR PURCHASE/ DELIVERY INSTALLATION NATIONWIDE |
| Re: Solar Energy, A Complement To FTA by S007: 7:33am On Jun 19, 2018 |
makavele: OMG. Not this thing called Roy again. |
| Re: Solar Energy, A Complement To FTA by zeestone99(m): 10:03am On Jun 19, 2018 |
Price list Batteries batteries batteries Quanta - 124k Monbat - 124k Spectra - 110k Nxt index exide - 120k Gaston - 115k Long - 120k Inverters Felicity 3.5kva -  Felicity 5kva/48v - 180k Spectra 1.5kva/24v - 70k Icell 2kva/24v - 105k |
| Re: Solar Energy, A Complement To FTA by primefaith1: 10:46am On Jun 19, 2018 |
Flames Solar Panels : 150w mono ...... ₦ 23,000. 200w mono........ ₦33,000. 250w mono..........₦40,000. 300w mono.........₦48,000. Call/whatsapp: 08084858853. |
| Re: Solar Energy, A Complement To FTA by VULCAN(m): 6:22pm On Jun 19, 2018 |
Reading this thread gave me headache. It's like listening to engineers from Starfleet Enterprise discussing warp drive problems. I really don't see Solar Inverters taking its place as a viable alternative to NEPA as the knowledge base required to enjoy smooth service is unknown to 99% of installers in Nigeria, so people will keep having issues with their systems! I'm having some issues with my setup but it seems too mundane for the high calibre brains here. So let me just ask a simple question. Between Mopower 3.5KVA/48V and Mustpower 4KVA/24V, which one is more reliable? 1 Like |
| Re: Solar Energy, A Complement To FTA by OnePunchMan: 9:42am On Jun 20, 2018 |
OnePunchMan: |
| Re: Solar Energy, A Complement To FTA by mcTrinity(m): 9:55am On Jun 20, 2018 |
VULCAN: hello Vulcan, I can't literally tell you which is more reliable as I've not installed Mustpower before. Nevertheless, I can tell you that I have clients that have been using Mopower for long now without issues. One uses his to carry his fridge and freezer, water pump (1.5hp pump), washing machine and including basic loads (TV, decoders, fans, lights). and of course, the heavy loads are not loaded at the same time, except for fridge & freezer; the fridge and freezer or washing machine are knocked off before the water pump is used. Also have one that uses his for fridge, electric sowing machine and basic loads.... and so on and so forth...... And trust me, I believe there are also guys here that has good review for Mustpower. Just that I'm a fan of USA/German and Indian products. Not really into Chinese brands. However, Mopower and Indian products alike have one major and serious setback: LOW CHARGING CURRENT. I'm yet to personally see an Indian inverter that has a charging current above 20A (usually 16A max for Mopower/Sukam). All the clients that I mentioned above have substantial solar system to effectively charge their battery and supply the loads so if you're going for mopower, just make sure you're going for a Solar system that can conveniently charge your battery. Aside the low charging profile, Mopower is very good and rugged. other experienced gurus can share. Cheers 4 Likes |
| Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:39am On Jun 20, 2018 |
kiekie1: HURRY WHILE STOCK LASTS |
| Re: Solar Energy, A Complement To FTA by earthrealm(m): 10:44am On Jun 20, 2018 |
VULCAN: i hv a mustpower 48v/4kva, runs like a champ..has 31amps charging current - tested ok with a standalone clamp meter, has batt type selector switch, and charging current adjuster etc..powers 2kw iron, 1kw microwave though not at the same time, its ok for my needs, only drawback is the massive idle power draw whcch folks here say is in excess of 100w, i hvnt tested this, shudnt be an issue, if you have solar panels \\\\\=phcn pumpmping in back the jiuce. personally i prefer 48v systems, cos of ease of adding over 4kw panels with the right cc, at minimal cost 4 Likes |
| Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 4:09pm On Jun 20, 2018 |
All points seconded. I have personally only done two 24v installations in my years in business as our offerings are targeted at residential and light commercial applications. 48v inverters and CCs allow one to easily push maximum power into the batteries both during mains and solar charging. The 5kw and 6kw Mustpowet inverters I have tested can run between 130w to 230w idle/no load draw - to put this in perspective, you will not be using the inverter in idle mode most of the time and so this idle consumption is not very important. What matters more is the inverter self consumption when powering a load - I have tested this to be between 50w to 80w. e.g if I am powering only one 100w bulb on the AC side of the inverter, the bulb will draw 100w from the batteries but the inverter internal circuitry and power conversion losses will draw a further 50w to 80w to make total battery drain of 180w instantaneous (using the upper limit). With my current 6Kw system, I observed that loads under 200w, the inverter draws additional 50w while above 200w, the inverter draws about 80w additional as self consumption. Certainly anyone who has a 3kw and above 48v inverter should be using at least 8 units of 12v 200Ah batteries or equivalent in an ideal system and the more battery storage you have, the less inverter self consumption will bother you. With the MustPowers you are sure to get a unit with user selectable voltage setpoints (allows to customise absorb charge voltage per specific battery type, adjustable charge current over a wide range, and a super rugged load carrier - these are the features thay may or may not be available in the Indian design inverters. One last thing if you are going with MustPower type brands is for you to ensure you buy from known sources with local brick and mortar presence, service center and an easy warranty process e.g Felicity brand as much as possible - that way if anything breaks you are assured of an easy fix and availability of parts/spares - you may not be well served in the long run if you buy from one man resellers or importers who will bring in/sell this flavor today and another tomorrow and when something breaks, will tell you the spares or parts for the version you bought are no longer available or can only be procured at great expense. earthrealm: 8 Likes |
| Re: Solar Energy, A Complement To FTA by sholatech(m): 11:54pm On Jun 20, 2018 |
Gurus in the House, please permit me to post the below vacancy on this thread..... Our Client, Zola Electric is interested in employing a Solar Specialist on full-employment basis. Uncover hidden opportunities to make a global impact. Zola Electric is a growth-stage start up that’s on track to light a million homes in Africa over the next couple of years with clean, affordable solar energy. At the heart of our business is innovative solutions that delight our customers. We are looking for a Solar Technical Specialist to join our team in Lagos, Nigeria, to support our growth strategy in Africa, changing the lives of millions with our innovative products. This may be your dream job if you’re someone who dreams of combining your knowledge and skills enabling Zola Electric to change the renewable energy landscape. You’ll also need to be passionate about bringing solar energy to off-grid and other underserved markets (billions of people around the world) with the unique social, technical, and business challenges that come along with it. You are inspired by the opportunity to unleash whole continents of human potential, and motivated to help build a truly epic business. Zola Electric, through its consumer brand Zola, combines Silicon Valley technology with local expertise to offer African homes and businesses a long-term solar solution to an unreliable grid. Adaptable to both energy needs and income, Zola Electric’s solution can be bought over time through a leasing structure. The first few watts starts a chain reaction that enables people to achieve commonly held aspirations: security, education, access to information, and a longer and more efficient day. Today, Zola Electric powers more than 100,000 homes and businesses across Tanzania, Rwanda and Côte d’Ivoire. Zola Electric’s investors include: SolarCity, Vulcan Capital, DBL Partners, The Packard Foundation, Helios Investment Partners, and responsibility. Zola Electric is the recipient of the 2016 UN Momentum for Change Award, Zayed Future Energy Prize, and the 2015 Global Cleantech 100. For more information, visit www.offgrid-electric.com. Position The Solar Technical Specialist role is a cross functional, technical role to assist in the creation of new solar products and features from ideation to launch. A skilled engineer to help install, test and document findings for new hardware prototypes that explore future technologies & user experiences. This role is primarily responsible for managing on the ground initiatives within the product pipeline, including identifying market and customer needs, developing and running prototype experiments, testing new products in market, documenting findings, and supporting Pan-African new product roll-out. In more detail responsibilities cover: • Lead product field testing, including coordinating product installations, collecting data logs, analyzing and consolidating customer feedback • Ensure on-site safety for team members and customers • Develop and document product technical requirements based on field surveys, customer insights and direct observation • Coordinate with field engineering teams and product development teams to commission solar installations, and conduct basic troubleshooting. • User testing & customer insight gathering • Develop a deep technical and market-based expertise on our core and future products • Employ human-centered design techniques while conducting research to identify customer needs and market opportunities • Monitor and report on products’ quality, adoption, and user reactions throughout the product life-cycle • Define market requirements, test new concepts, and facilitating the introduction of new products to market • Assist technical hardware developers with customer insights, field trial support and collaboration with commercial teams • Drive continuous improvement and ongoing innovation throughout the product lifecycle • Act as a coordinating point of contact between departments that delivers well-positioned products to the market • Develop analysis tools for building the internal business case for new products and offerings • Manage various projects from start-to-finish as the project lead including planning, budget, contract development, customer outreach, etc. • Design, plan, and execute pilots for learning, iterating, and introducing new products and customer offerings across multiple African markets • Act as the primary interface with customers during product trials and testing maintaining a positive relationship and prioritizing customer satisfaction • Collect inputs, update and report findings to cross functional groups and company leadership • Identify, vet and negotiate contracts with local agencies for solar installations, marketing testing, etc. Requirements Our ideal candidate has product management, business administration or marketing experience with a degree in Electrical Engineering or equivalent. You will be a critical player in executing on our product strategy. • Bachelor / Master in Electrical Engineering, with over 3 years of working as Electrical Engineer • Experience in emerging-frontier markets and delivering products in those markets • Certifications and training in project, program or product management • Previous experience working in African markets and in solar or energy production • In-field experience as electrical engineer and interfacing with energy customers • Knowledge of market dynamics, technology and competition to synthesize into product strategy • Knowledge of project management principles and financial principles • Knowledge of energy systems, solar and battery technology, and electronics • Collaboration skills to contribute and lead cross functional teams • Analytical and troubleshooting skills • Proficiency in English, basic working proficiency in one or more of the following languages: French, Swahili, Twi, Ga, Hausa, Yoruba, Igbo; • Communication and Interpersonal skills • Innovative and quality focused • Collaborative, customer focused and deadline driven • Based in Lagos, Nigeria with frequent travel to West African markets. • Occasional travel to additional international offices. • Frequent interfacing with counterparts in other offices via video conferencing. Let’s Connect Are you interested in this position and join our team in Lagos, Nigeria, let’s connect and send your resume with Subject Line 'Solar Technical Specialist' to our email oge.bayroyal@gmail.com before close of business, 27th June, 2018. Employer: Zola Electric Website: http://offgrid-electric.com/#home |
| Re: Solar Energy, A Complement To FTA by VULCAN(m): 8:47am On Jun 21, 2018 |
@mcTrinity,Thank you for your detailed response. Have been using solar for two years now and after spending a fortune have only had substandard results obviously due to the ignorance of the installer. I am trying to start over again but no longer inclined to spend huge sums just to power a few items in my home. Apart from the 3.4KVA Bluegate inverter, I will also be changing the Charge controller but as I'm not yet decided on whether to upgrade to a 48V system i would like to know your thoughts on a cost effective brand whether 24V or 48V and either PWM or MPPT. Gurus in the house are also implored to drop advice. Thanks mcTrinity: |
| Re: Solar Energy, A Complement To FTA by VULCAN(m): 8:52am On Jun 21, 2018 |
| Re: Solar Energy, A Complement To FTA by VULCAN(m): 8:58am On Jun 21, 2018 |
Hi earthrealm, How much does the Mustpower cost? Does it have a loud low voltage alarm? And what brand and cost is your Charge controller? earthrealm: |
| Re: Solar Energy, A Complement To FTA by makavele: 9:00am On Jun 21, 2018 |
VULCAN: Without typing too much ENGLISH ROY Solar is a PWM charge controller (and a very fake one at that); unlike MPPT charge controllers. Do a google search PWM vs MPPT charge controllers and expand your horizon. |
| Re: Solar Energy, A Complement To FTA by VULCAN(m): 9:48am On Jun 21, 2018 |
@Niyi, thanks for this detailed response. I'm in Lagos so do you have any suggestions as to the "known sources" you mentioned. Thanks NiyiOmoIyunade: |
| Re: Solar Energy, A Complement To FTA by mcTrinity(m): 10:07am On Jun 21, 2018 |
VULCAN: what are the intended loads on the inverter system? how many batteries do you think you can afford?? 2? 4? 6? 8? |
| Re: Solar Energy, A Complement To FTA by mcTrinity(m): 10:39am On Jun 21, 2018 |
IS "ROY SOLAR" THAT BAD For some weeks now, there's been some bad reviews on Roy Solar charge controller.... well, I won't outrightly say it is good or bad. Nevertheless, I have 2 Roy solar I've been using going to 3 years now and no issues whatsoever. see attached pictures. one is for East facing panels and the other for west facing panels. the CCs always absorbs at 14.4, boost charge at 13.8 and floats at 13.5v. And the two are almost always at synch, in terms of their reading (1st pic) I have a client that was using Roy solar on 8 batteries with 4 pcs of Mpower 250w panels on a 48v system. Back then, I've seen about 21A on a sunny day. Though after 2 years he upgraded to 16panels with MPPT. for those two years, the ROY served him and his batteries aren't dead. Have 2 more clients like that. oga Niyi made a vital point in his last reply about "Source" As long as RE is concerned and as long as this nation is concerned, substandard and rebranded products are everywhere. it boils down on your source. I knew a man that, after 8 years, changed his Deka 12v/210Ah battery. he still bought Deka and after 5 months he said I should come and help him check his batteries that they are no longer performing well. Two of his 6 batteries (24v system) have deviated. he's using magnum MS4324. same load, same inverter, same usage... I once shared on this forum how I bought original sunshine panels and few months after that I bought another set for upgrade only to discover the new ones were rubbish. same brand, same nameplate, same size... different cable and different connection box SOURCE!!! so those that complain about the Roy, I believe, they must have gotten a fake one. I don't know why it didn't serve them. it's been serving me and just last 3 months, I dumped the mopower 900VA/12v for mopower 1600va/24v. changed to 24v system and the same ROY controllers are serving. just waiting for the batteries to die so I can move to 48v,,, with MPPT of course (Lolz) so Vulcan, like someone advised, read up on MPPT and PWM... the gurus here have explicitly and argumentatively explained their differences. it's either you google their differences or you start going back on the pages and actually read their practical differences based on various experiences. But anytime, anyday MPPT rules... In summary, I'm not saying you should go for Roy or not go for Roy. just sharing my PERSONAL experience. cheers 4 Likes
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| Re: Solar Energy, A Complement To FTA by VULCAN(m): 11:00am On Jun 21, 2018 |
You made a rather emphatic statement about ROY solar in particular so that was why I asked expecting an explanation. I know that MPPT is a superior technology to PWM in general, but I also know that not every brand of MPPT is good and not every brand of PWM is bad(After all, even Morningstar produces PWM). At the end of the day it's based on what the manufacturer decides to put inside the box. Google is an aggregation of people's knowledge and experiences but I wanted to know of yours-so could you kindly educate me on what is so bad about RoY? And as I asked previously, which brand do you recommend as an alternative? makavele: |
| Re: Solar Energy, A Complement To FTA by makavele: 12:12pm On Jun 21, 2018 |
VULCAN: And yes, my reason was enclosed in brackets; you didn't bother to read it; where I said it's a very fake one at that . . which means there are fake PWMs but Roy is the "fakest" I have come across so far. I used to have one a generic one with CM3024Z imprinted on it. You google that number for pictures of it. It does a better job than Roy albeit PWM. 4 Likes |
| Re: Solar Energy, A Complement To FTA by zellfoxx: 12:27pm On Jun 21, 2018 |
Good afternoon fellow Solar enthusiasts Does anyone have personal experience installing the Schneider conext sw 4048 inverter. Was going through the AC wiring diagram in the manual and discovered there is no AC input neutral. I purchased the pre-wired AC switchgear (which omitted the AC input neutral line in the pre-installed wiring). Is the SW4048 neutral bonded to ground inside the inverter?
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| Re: Solar Energy, A Complement To FTA by dapsyra(m): 1:25pm On Jun 21, 2018 |
mcTrinity: To buttress your points, I have Roy Solar panels that I have been using for about three years and they are performing like champions. My daily harvest is at par or even better than from so called premium brands. 3 Likes |
| Re: Solar Energy, A Complement To FTA by hardywaltz(m): 2:38pm On Jun 21, 2018 |
zellfoxx: Most inverters have their Neutral linked together. That is the input and output neutral are same. So all u need is an AC live input (from mains) , AC live Output (from the inverter) and Neutral output/input (also from the inverter but linked to mains) and ur Earth cable |
| Re: Solar Energy, A Complement To FTA by Barezzi(m): 3:48pm On Jun 21, 2018 |
Yes, everything is all nice and good in "pass through" mode until the inverter switches to battery mode. I understand the neutrals are bonded in "pass through" mode, but broken in battery mode. Thus leading to floating neutral issues. In my installation, I simply looped both neutrals. I'm no electrician, but I've been told this "solution" is not very safe. |
| Re: Solar Energy, A Complement To FTA by Saipro(m): 4:28pm On Jun 21, 2018 |
mcTrinity: It's mostly about sizing of the system. Back in the day, long before MPPT technology, folks had solar. A mismatch in components/of equipment will invariably lead to early (at times catastrophic) failure |
| Re: Solar Energy, A Complement To FTA by mcTrinity(m): 4:28pm On Jun 21, 2018 |
zellfoxx: have one I'm still wiring... see pics. Is yours different?
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| Re: Solar Energy, A Complement To FTA by VULCAN(m): 4:49pm On Jun 21, 2018 |
Thank you. I have been using Roy for 2yrs now and as I want to upgrade my system I am searching for reputable but cost effective alternatives to everything except for the panels. Most installers/resellers are not really interested in whether you are satisfied with your system once money changes hands so I want to be more careful this time. I have googled the CM3024Z. Just As you said it's a generic one. I will look around for it if I decide to stay with PWM makavele: |
| Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 5:28pm On Jun 21, 2018 |
In a properly balanced 3 phase system, the neutral wire should carry zero or very little current - shared or common neutrals though frowned upon by the NEC are still grudgingly included in the code with the proviso to oversize the neutral conductor to safely carry the maximum current expected on all the live circuits combined (my interpretation). In a 3 phase Transformer or Generator there is still only one neutral wire at the center of the system ditto for the household main panel which has only one common neutral bar - run as many neutral wires as you choose and separate input and output neutral and they all still terminate to that one bus bar. The key is to (over)size the central neutral conductor to safely bear the maximum ampacity of the system and make sure the smaller branch circuits also have their wires properly sized. For safety to prevent voltage potential remaining on a neutral wire, it is a requirement to implement the 'common trip' - one should break both live and neutral wires with a double pole breaker in a single phase system and use a 4 pole breaker in a 3 phase system reserving the 4th pole for the neutral wire. Further the breaker in a 3 phase scenario must be rated for the maximum combined ampacity of the system to avoid nuisance trips. Where single pole breakers are used then they should be ganged so that one breaker tripping will trip all the others. Where one may have issues with looping the input and output neutrals of an inverter is how to safely terminate energy flow and prevent any voltage potential on any part of the circuit when a safety breakers kick in but perhaps billions of households have done it this way (common neutral) with no issues for years. So although not best practice, common neutrals are the easy way to do things and probably here to stay forever. Question for the electrically savvy in the house - should the neutral bar and ground bar be bonded together at the service entry point/distribution panel in Nigeria? The foreign standards all seem to talk about this as standard practice but I am yet to see it done anywhere here in Nigeria. Barezzi: |
| Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 5:57pm On Jun 21, 2018 |
To get any PWM to work efficiently and effectively, your system design must be on point, panel voltage must be properly matched to battery nominal voltage and cable sizes and distances must be properly calibrated to avoid losses and inefficiencies. I dare say your average installer is too lazy to achieve this feat and also locally available panels may not easily provide the right kind of voltage to efficiently put power into the batteries - all this is in addition to the requirement to size the system properly (enough panels to power loads and refill drained batteries in one average solar day) MPPTs make it easy to harvest power from the sun - any average Joe can cobble together any locally available panel brand and stack them to achieve the proper voltage, run the minimum cable gauge and voila you have MPPT magic and solar juice flowing - the ability to find the optimum power point for the PV array to operate at and also down convert what would have been excess PV input power into useable power on the battery and load side is not to be scorned and cannot be over emphasized. Long and short of this my epistle is for you to use a proper MPPT controller instead of PWM unless your power requirements are truly minimalist. You already appear disillusioned with the whole RE experience yet a good number of us here are having the best time of our lives because we took time to learn and do it right. If you are on a budget you may choose any of the many Fangpusun MPPTs clones or otherwise spludge on a premium controller. Get an installer on here (someone who actually powers his own house off solar) to come do an audit of your household and current installation and recommend any changes you need to make or new equipment to acquire. If you wish to go the DIY route then read up on this and other blogs, throw us your questions and the good folks on here will give you the best support they can. Both here in Nigeria and abroad, it is common for people who won't take the time to learn the proper workings of RE to have a substandard installation foisted upon them despite that they parted with good hard earned cash and then they lament that RE doesn't work. The more you arm yourself with knowledge, the more your chances of being ripped off reduce and the more the chances you will get yourself a system to be happy with and be proud of. I daresay that after your house rent/house construction, home furnishing, car purchase, children's education costs are covered, power generation and renewable energy is probably one of the next big budget items anybody would spend on and is therefore deserving of more than passing attention to get it right. Cheers VULCAN: 4 Likes |
| Re: Solar Energy, A Complement To FTA by Barezzi(m): 6:03pm On Jun 21, 2018 |
Many thanks NiyiOmoIyunade for the very detailed response. Should the neutral bar and ground bar be bonded together at the service entry point/distribution panel in Nigeria?I believe this is already done at the transformer and the service entry point of most homes. It's this very matter that worries me. When the inverter switches to battery mode, this N-E bonding at the service entry is lost. If there's any fault in the house, one becomes a very healthy conductor of fault currents to earth! I also understand earth leakage breakers will not trip in this scenario. The general advice is to create a second N-E bond at the inverter that is active only when it's in battery mode. Anyway, our electrical gurus in the house what's the code for hooking up alternative energy source (inverter/generators) at home? |
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