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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 efuro(m): 9:59pm On Oct 22, 2017 |
earthrealm: A wonderful plus to epsolar. This will make the cc rise in price soon cos marketers will cites it as truly rugged. |
Re: Solar Energy, A Complement To FTA by mcTrinity(m): 10:50pm On Oct 22, 2017 |
please, anybody has any idea about Multipower inverters...? heard its a brand of Sukam |
Re: Solar Energy, A Complement To FTA by mcTrinity(m): 10:55pm On Oct 22, 2017 |
idsolar: no personal experience though.. but I know two people that have used theirs about 6years (3.5kva specifically) one later had issue with charging. the inverter no longer charges the battery the other one later had issue with back feeding. the inverter output will be back feeding to the input one common issue with both was that the screens went blind that's all I know... but I think they're rugged |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:31am On Oct 23, 2017 |
mcTrinity:Neither of mopower, multipower is a brand of sukam!!! I have spoken to sukam reps and they totally deny such claim which seem to have become gospel even on here. Mopower is some clone of sukam made to ride on the reputation of the latter. 2 Likes |
Re: Solar Energy, A Complement To FTA by mcTrinity(m): 7:35am On Oct 23, 2017 |
bigrovar: I appreciate the contribution... but why does Mopower inverters bear Sukam logo on them.? I've even seen the DSP board of mopower 5kva and it bears on it that Sukam "S"-like logo on it. in addition to the one on the external body of the inverter |
Re: Solar Energy, A Complement To FTA by Saipro(m): 9:07am On Oct 23, 2017 |
bigrovar: I run my DC security lights on auto. Without any further wiring or installation of timer switches, my security lights all come on and go off when due, year round. To forestall voltage drop, they're 24V floodlights (some are even PIR activated, to save power). Hybrids have their place. |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 9:31am On Oct 23, 2017 |
kiekie1: naaah, wanted to try something new. started with morning star 45amp cc, after it got back..and i have been unable to send it in for waranty repairs [5yr waranty], got the 60amp epsolar from you, wanted to try something new, as epsolar is lacking in some display parameters, which my beloved MS had... wish epsolar would make their display data more robust as morning star or victron 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 9:49am On Oct 23, 2017 |
earthrealm: Good morning , good to know dear ! 1 Like |
Re: Solar Energy, A Complement To FTA by pranil(m): 12:19pm On Oct 23, 2017 |
Jamzig1: It actually makes sense to reduce conversion losses but not practical yet due to lack of appliances and codes /standards and switchgear - The problem of arcing in DC system is very predominant and needs to be addressed to meet safety requirements while improving the efficiency of the system http://ieeexplore.ieee.org/abstract/document/5543501/ http://ieeexplore.ieee.org/document/7286585/ Abstract: In this paper, loss of a dc microgrid system for the residential complex is compared with the loss in an ac system. Each system has a PV system, a gas engine cogeneration and 20 residential houses. The losses are calculated from measured load data and PV output data which was estimated from global solar radiation and temperature of a PV panel. The operation of the gas engine cogeneration is determined from the heat demands. As house loads, we consider an air conditioner, a refrigerator, a washing machine and a liquid crystal display (LCD) in each house. The loss calculation result shows the total losses in the dc system are around 15 % lower than the losses in the ac system 1 Like |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 1:56pm On Oct 23, 2017 |
kiekie1: the epsolar remote display, do you know if it displays other extra harvest parameters. like i need daily log of solar harvest in kwh or ah, suprisingly epsolar didnt include it and other stuff in the display screen on the unit i mean the MT 50 do you have it in stock?..how much are you selling it..if yes
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Re: Solar Energy, A Complement To FTA by kiekie1(m): 2:49pm On Oct 23, 2017 |
earthrealm: I have them available .. Brand new mt50 - 13k Fairly new A series 12-24v 40a mppt with mt50 .. 1 unit remaining ! What's app : 08135031951 1 Like |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 4:26pm On Oct 23, 2017 |
kiekie1: Good, though you didnt confirm if it displays extra /info that the primary unit doesnt show, thats what am interested in |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 5:01pm On Oct 23, 2017 |
earthrealm: That's the main reason why its been sold and installed via com port ... Reach me privately via my mobile num in profile . I was thinking you have gone through the manual or YouTube config clips 2 Likes 1 Share
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Re: Solar Energy, A Complement To FTA by makavele: 7:23pm On Oct 23, 2017 |
kiekie1: hw mach ? 2 Likes |
Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:06am On Oct 24, 2017 |
mcTrinity:Anyone can clone another.. They probably source their components from same source as sukam Ala Fangpusun outback / victron. But they have no association with sukam whatsoever. At least sukam guys totally denied them. 1 Like |
Re: Solar Energy, A Complement To FTA by BlackBaron: 3:14pm On Oct 24, 2017 |
Hi guys. I read this section from time to time. Was wondering on how to go about starting off with solar power. What is(are) the best company(ies) out there in terms of reliability, plus what are the costs involved for a mid level to elaborate installation. Electrical items such as fridge, freezer, tv, washing machine (?), light and so. |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 5:39pm On Oct 24, 2017 |
The last time I checked the MT50 remote display does not connect natively to the 60a EP Solar Etracer CC - the data connection interfaces are not directly compatible - perhaps you could rig something up thougjh. I have seen the MT50 working well with the lower amperage EP Solar CCs but never the 60a - you should do some further research to be sure earthrealm: 3 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 6:04pm On Oct 24, 2017 |
Bros you were only lucky that your PV array at ~1500w was well within the current clamp safe limits of your EP Solar or else the negative cable disconnection from its crimp happened during the low sunlight hours. Disconnect the CC from battery while your array is pushing like 3000w through and you will surely release the magic smoke This speaks to something I had mentioned earlier - CC fault tolerance is much reduced with large or oversized arrays - the only MorningStar CC I ever managed to brick blew up when the 100a DC breaker between the battery and CC suddenly tripped while the CC was putting 3000w/~54amps * 56volts into my batteries around 2pm - I had a 4.5kw PV array at the time. From that day forward, I use only manual disconnects or heavily overrated fuse blocks between CC and battery - it was a truly expensive lesson at ~250k replacement cost for a new 60a Morningstar CC. All said you should reconsider your crimping method/tools - it is very unusual for a well made crimp to loosen and disconnect from the cable. earthrealm: 2 Likes |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 7:27pm On Oct 24, 2017 |
NiyiOmoIyunade: nice observation about the MT 50, will do further research though kiekie has both, so he can help us confirm yeah, the crimping was a bit rough. your theory about an oversized array....hmmmmm from the logs...it disconnected about noon and was disconnected for 1wk...was smelling a lil burnt--wch made me loose hope initially. your MS, how many minutes was it disconnected?..want to have an idea how long it took to burn out 1 Like |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 8:45pm On Oct 24, 2017 |
As the battery DC breaker dey trip na im I dey hear gboa!!! It was virtually instantaneous - my batteries and CC are placed on the balcony and I happened to be on the balcony with two friends when it happened. Quickly switched off the solar input breaker but every attempt to switch on the breaker between battery and CC to restart the CC na that electronic crackle/sizzle with some fire coming out of the CC na im we dey see. Both the EP Solar and Morninngstar manual recommend to not disconnect the CC from battery while power from the PV array is coming in - since the CC cannot be powered off solar input there will be no way to invoke the electronic protections of the CC. Before that fateful day I had carelessly switched off the battery breaker while solar input (no more than 20amps at 48v) was still active - you would hear a 'pop' but no damage - I was lucky then because I was switching off to do some sort of maintenance and it was always early morning or late evening when little power was coming in from the sun. The burnt smell from your CC was probably not the CC but partial contact from the crimped wire that eventually came loose. earthrealm: earthrealm: 1 Like |
Re: Solar Energy, A Complement To FTA by zeestone99(m): 11:58pm On Oct 24, 2017 |
BlackBaron:Call /whatapp 08117398294 for affordable quote n proffesional install |
Re: Solar Energy, A Complement To FTA by JUO(m): 8:12am On Oct 25, 2017 |
NiyiOmoIyunade:He was lucky there wasn't enough power from the panels to fry the cc. The 1500w was within the range of safe zone to allow the transistor to disconnect the PV. This is not about brand, if you had pumped in 1500w @24v the cc will fry. I have destroyed more than 3 cc like that. Please be safe 1 Like |
Re: Solar Energy, A Complement To FTA by earthrealm(m): 8:48am On Oct 25, 2017 |
JUO: HMMMM that implies undersizing the array has some benefits. on the manual epsolar states the 60amp cc can handle 1600w @ 24v, i have 1500w panels, and the max instantenous harvest i hv seen is 1290w & 43amps...on a super hot/sunny day, and have been toying with adding an additional 500w panel, so factoring in losses and all..i wud still be within the 1600w range, as e be so..may hv to pause a bit |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 10:29am On Oct 25, 2017 |
There is nothing wrong with oversizing your array within the safe limits - its just that oversizing implies you are an expert/professional who thoroughly knows what he is doing - CC fault tolerance usually reduces as currents and voltages increase. So there is little or no forgiveness of sins/mistakes if you oversize or hypervolt - e.g. for EP Solar with a 3kw array at 48v you can reverse polarity on the CC input without damage but if you make that same mistake with a greater than 4.5kw array - very likely the CC will not forgive that mistake and punish you by releasing the proverbial magic smoke - but if you do it right you can safely oversize your array up to 6kw in a 48v system When you oversize just be going slow and steady thinking each step through and making measurements and confirming polarity at each stage before making any connections earthrealm: 1 Like |
Re: Solar Energy, A Complement To FTA by JUO(m): 10:50am On Oct 25, 2017 |
earthrealm:oversizing will not fry the cc, so you are free add more 500w and you stand to get more, extend battery life, hit 50a before 10am. Believe me you will never see 60a even at peak, that is one of the things I don't like about epsolar. But you can get 1800w if you modify the cc |
Re: Solar Energy, A Complement To FTA by Saipro(m): 11:30am On Oct 25, 2017 |
NiyiOmoIyunade: A Midnite Classic I supervise survived a similar experience. Kept working. Only noticed the problem because the PV voltage was unusually high and the output was zero, as if it were on standby. Lucky thing |
Re: Solar Energy, A Complement To FTA by pranil(m): 1:40pm On Oct 25, 2017 |
JUO: No amount of oversizing should fry a MPPT CC unless you exceed the VoC. The CC limits the output current to its max rating. Although it is not a good idea to run CC at max current rating as the ratings are usually 40 /45 DEG ambient. and in Nigeria, we can exceed that in closed spaces The morningstar is notorious for frying on battery breaker trip as it's Transient surge rating is very low. The correct way to restore the system in such a situation is to trip the PV breaker - Allow the CC to cool down and dissipate the residual charge ( usually 5-10 min) switch on battery breaker wait for a minute and then PV breakers one at a time It is also a good idea to set the battery voltage to fixed value instead of autodetecting especially for 24 and 48 V systems as the CC can be set to a wrong value if you switch on battery and PV in rapid succession reference -- Quote " https://www.morningstarcorp.com/advantages-morningstars-dc-coupling-vs-ac-coupling-whitepaper/ You can size Morningstar’s MPPT controllers well above the Maximum Nominal Solar PV Input rating without damaging the controller and without the charging current exceeding the maximum output current rating. The controller can limit output current and will run at 100% of rated current output and not higher. The controller was designed with this power-shaving capability and when oversized it does not void the warranty.” – Tech Article – “Morningstar’s TrakStar™ MPPT Technology & Maximum Input Power” 2 Likes
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Re: Solar Energy, A Complement To FTA by kiekie1(m): 3:22pm On Oct 25, 2017 |
pranil: Very elaborate & articulate ! Well-done Sir 2 Likes |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:25pm On Oct 25, 2017 |
Oga Pranil, verily, verily, I say unto you, all Controllers are not created equal - you can safely oversize the Morningstar multiple times over the rated PV wattage - although anything over 200% overrating, I would struggle to see the benefit and call it inefficient design. For the EP Solar E-Tracer series, the manual states the Maximum PV Array Size = LBatt * VmP where LBatt is the maximum battery charging current and VmP is the PV maximum power point voltage. For the 60a EP Solar eTracer used in a 48v nominal battery setup with the common MPPT 3 x 3 config (3 pieces 24v nominal panels in series), that would yield LBatt 60amps * VmP 115volts = 6,900w as the maximum PV array to use (I think the manual specs 6,300w sef) - because there is some play around what the VmP may be for different panels, to be safe I would stop around 6,000W PV array size . I have no knowledge whatsoever of Midnite because I don't like it and have never used it - a pet beef you might say I will let the users and pros tell us what the maximum safe PV over size is if any. Between, how do you paste pictures so that they stay in the body of the text? I have tried the [img] [/img] tags but only succeeded once - I want to paste an excerpt from the EP Solar manual just like you did. pranil: |
Re: Solar Energy, A Complement To FTA by bisi12004: 5:52pm On Oct 25, 2017 |
Please I need an assistant on how to protect my inverter from lightning strike through the solar panels. |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 6:15pm On Oct 25, 2017 |
bisi12004: Simply Contact me for the Mnspd DC 115/300 @ discounted price ... Smartcell global services 081-350-31951 1 Like
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Re: Solar Energy, A Complement To FTA by pranil(m): 8:06pm On Oct 25, 2017 |
NiyiOmoIyunade: I just use the image tab but my images are from Windows snip utility that may be the reason. I just posted EPSOLAR also in my post and although not explicitly stated about oversizing they do mention Overcurrent protection. Please remember this is not applicable to PWM models but only MPPT . one more interesting read specifically on pV oversizing by morningstar https://www.morningstarcorp.com/whitepapers/morningstars-trakstar-mppt-technology-maximum-input-power/ 2 Likes |
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