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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2276042 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 ojeysky(m): 9:48pm On Aug 10, 2019 |
lexi28: Yes it's a double pole breaker[1], so the PV cable and SPD cable goes into it. As to the earth, I have not yet connected that, I plan link it to the earth point of the CC(the CC is already connected to my home earthing system). 1] Yes I currently just place the SPD and DC breakers on the CC will hang it somewhere later to make it neat.
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Re: Solar Energy, A Complement To FTA by lexi28(m): 9:55pm On Aug 10, 2019 |
aorseer: you're welcome. a suggestion : you can contact a fellow student Horlaarsco who posted above, he is going to Alaba on Wednesday as he posted. if you ask him nicely, he can oblige you the favor. depending on your budget, you could search for monikers like JUO, Zeestone for quotes, other vendors freely post their goods and prices a few pages back. some ogas like Mr Niyi, Mr Pranil , GeorgeD1, may have a few odds and ends from their spare stores for you. just ask nicely. there are other core enthusiasts who could be of help. send out your request, if there are items you cannot get or if your budget is tight. best of luck, keep us updated on your progress. wish you heavens best. 1 Like |
Re: Solar Energy, A Complement To FTA by lexi28(m): 10:05pm On Aug 10, 2019 |
[quote author=ojeysky post=81138214] Yes it's a double pole breaker[1], so the PV cable and SPD cable goes into it. As to the earth, I have not yet connected that, I plan link it to the earth point of the CC(the CC is already connected to my home earthing system). 1] Yes I currently just place the SPD and DC breakers on the CC will hang it somewhere later to make it neat.[/quote hi, the SPD is only effective when the earthing terminal is used, as it is now, its on holiday.lol. everyone starts out small, once you tidy up the wires, you're good to go. cheers |
Re: Solar Energy, A Complement To FTA by eleojo23: 1:03am On Aug 11, 2019 |
harizonal123: Starting with a 100ah for now so I think 10-20amps charger |
Re: Solar Energy, A Complement To FTA by ceaser: 3:33am On Aug 11, 2019 |
NiyiOmoIyunade: I considered all the possibilities including your alternative hypothesis when I clearly noticed the trend and while it may give some acceptable though not incontrovertible explanation for the changes in watts of the freezer cabinet with different stages of refrigeration, ambient temperature, lid closing-opening cycles, it definitely won't explain the nearly half reduction in measured consumption of the sliding gate opener when removed from a 12v system to a 24v system. It equally doesn't explain that phenomenon as it occurs with the TV. Now what I presume is this: The intrinsic consumption of any device remains the same when placed on any system (12v, 24v, 48v). However a measuring device to measure the current consumption on a 12v system may require some re-calibration when it is to be applied to a 24v system or other systems. Remember these measuring devices are not CC-CV (constant current-constant voltage) devices. And the reason isn't really far fetched. The same reason I can comfortably use a 1000 watts device on a 24v 1kw inverter without the inverter to some extent whereas the same rating of 1000 watts equipment will not be tolerated by a 12v 1kw inverter. The 24v inverter will operate that 1kw equipment at 500 watts tolerable limit for the system while the 12v inverter will operate the same 1kw equipment at 1kw intolerable limit. Though no experience with a 48v system yet, I believe the same extrapolation will go for a 48v system which will operate the same 1kw appliance at a much lower (maybe like 250 watts). In all instances, the wattmeter will measure somewhat different consumption. Another similar experience i had is with use of generator. I had a freezer connected to the gen via the wattmeter. I also had a washing machine and pumping machine plugged in at different socckets in the house but without wattmeters. With the freezer only working, the freezer wattmeter read 227v/115 watts. When the pumping machine kicked in about 2 minutes later, wattmeter freezer readings changed to 200v/139 watts. A minute later that washing machine was used, generator output dropped to 185v and the freezer mmeasured wattage shot up to 156 watts. In all of these scenarios, I think it's basically the Voltage-Current inverse relationship that played out and in this the law of V=IR and Power=IV applies. Remember that AC wattmeters function on the "hall effect" which involves measuring the CURRENT using electromagnetic induction in a coiled inductor around the LIVE wire to the appliance. So the standard i believe, is to measure using 220v grid power which is almost always constant,although the "half and low" current that bedevils Nigeria's grid supply may defeat that. I still stand corrected in all my assumptions though. 3 Likes |
Re: Solar Energy, A Complement To FTA by ceaser: 3:40am On Aug 11, 2019 |
Namzy: It's still on the inverter though. What I think is "completely disconnected" from the inverter and plugged directly into the mains via the wattmeter, then note the wattage consumption. And oh, also note the instantaneous AC Voltage input to the freezer as measured by the meter also. |
Re: Solar Energy, A Complement To FTA by ceaser: 3:46am On Aug 11, 2019 |
Namzy: Sorry i just went through your submission again, carefully. So if it's less 70 watts connected directly to grid, that my brother is some cool shyte. That's one heck of a great power saver freezer you got there. Even the regular DC powered freezers consume no less, capacity for capacity and are way more expensive. |
Re: Solar Energy, A Complement To FTA by ceaser: 3:55am On Aug 11, 2019 |
oluwaslimzzy: How much is the 12v 12ah 12v 18ah? I've had pretty disappointing experience with 18AHs (about 5pcs so far) that I used, all bought off of Konga at different times from different sellers. Perhaps those I bough then were expired ones. Do you have the 12v 24ah? |
Re: Solar Energy, A Complement To FTA by ceaser: 4:33am On Aug 11, 2019 |
Penuelseun: wwwdetail2mobilesitedetail&spm=a2g0s.12269583.0.0.2b1050d5HVGS6C">https://m.aliexpress.com/item/32954335647.html?trace=wwwdetail2mobilesitedetail&spm=a2g0s.12269583.0.0.2b1050d5HVGS6C Had to make a re-order as I burnt off the one I had before while I was doing some tweaking with the gate opener. Took the delivery yesterday and fixed it same day. As you can see, the delivery took less than two weeks. The whole system (inverter, battery, SCC) was modular, in a plastic conduit box inset in the fence. I noticed sometime ago that the inverter occasionally cuts off the power output during the daytime. Trouble shooting revealed the over-temperature protection feature causes that. The midday sun and afternoon sun literarily shines directly on that box. Sadly the inverter fan is the "always on" type and it is not a powerful one (not powerful at all) and you can hardly hear the fan when it works. So I considered replacing the stock 24 volt fan with a spare powerful, equal dimension 12 volt fan I salvaged. I couldn't recall where I kept the CC-CV buck converters I had in storage. So I decided to go with in-line current limiting resistor approach. Hooked things up and as I was connecting the 24v battery supply, the fuse and apparently more things burnt cos the replacement of the fuse did not revive the inverter. Now the replacement does the same over-temperature protection shyte and I am wary of even tweaking anything now. I have tried removing the top of the inverter to leave it open for some air to circulate but it doesn't seem to make much difference. Since it's modular (for the opener alone), I prefer to leave it in its position embedded in the fence. I also don't wanna put some small roof covering to shield it from he sun in order to keep the aesthetics of the fence. Peeps please what do you suggest?
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Re: Solar Energy, A Complement To FTA by ceaser: 4:43am On Aug 11, 2019 |
Dishtech: Why don't you with time, consider replacing your inverter with an inexpensive pure sine wave type in order to have more efficiency from the system? A 500 watts peak, 300 watts continuous power PSW inverter will suffice for your load requirements. I am sure your inverter will have a high no-load current draw that will reduce the efficiency of your system. By the way, you dey lucky with your Li-Po batteries o. That size is perfect for some waka wey I get for plan. Abeg you fit show me the way? Na beg adebeg ![]() |
Re: Solar Energy, A Complement To FTA by ceaser: 4:50am On Aug 11, 2019 |
mcTrinity: Just thinking. Can this set up be automated with some combination of timer relays and battery SOC sensors? Those timer relays that handle up to 40 amps would do. |
Re: Solar Energy, A Complement To FTA by ceaser: 4:53am On Aug 11, 2019 |
Dishtech: @ Dishtech. I feel you could help to repair a damaged 500 watts/24v PSW inverter. Shebi? |
Re: Solar Energy, A Complement To FTA by ceaser: 5:05am On Aug 11, 2019 |
harizonal123: If I were in his shoes, I will consider using AC charger to charge one set of the battery that is not connected to the solar with the AC output from the set connected to solar panels during sun hours. Then do the switch over later. That way, he won't have to use two SCCs and he won't have to divide his solar panels into two to create two different charging circuits. The AC charger will ensure that the battery is topped up as early as possible and the charging functions of the chargers are automatically turned off once the battery is full, hence he needs not worry about overcharging his batteries with AC charger |
Re: Solar Energy, A Complement To FTA by Penuelseun(m): 6:40am On Aug 11, 2019 |
ceaser:Thanks |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 7:12am On Aug 11, 2019 |
Your observations are not incorrect - I am just seeking a plausible explanation - a universal answer as it were. The things I suspect are 1) Watt meter calibration and internal operating design. Watt- meter is normally expected to read approximately same regardless of operating voltage. 2) A sort of measurement bias if you keep unplugging and plugging the watt meter to make your measurements. It is dangerous to assume that you could use a larger load on an inverter simply because it has higher nominal voltage. A 1kw rated inverter should handle nearly 1kw whether it is 12v, 24v or 48v. The size of transformer, quality and gauge of windings and other internal components would go a long way to determine what load could be safely borne. I always advise temperature derating of inverter load at a minimum - for Asian origin inverters people usually do max 70% of the inverter rated capacity. ceaser: 1 Like |
Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:35am On Aug 11, 2019 |
Happy Eid-El-Kabir to our Muslim customers! We're loyal and appreciate more of your patronage Insha Allah ... Amin Courtesy: Smartcellglobal services
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Re: Solar Energy, A Complement To FTA by ceaser: 12:59pm On Aug 11, 2019 |
NiyiOmoIyunade: Okay boss. |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 1:18pm On Aug 11, 2019 |
Hi house, Pls those knowledgeable about the internals of an mppt charge controller.....As a rule of thumb, whats the value of the cc input (or output, not so sure) capacitor and its max input voltage? I mean those big black electrolytic caps in them. |
Re: Solar Energy, A Complement To FTA by lexi28(m): 2:16pm On Aug 11, 2019 |
ceaser: hi, why don't you buy a 12v Dc fan & a GOTV 12v adapter. connect the adapter to output of inverter, then place fan directly blowing into the inverter. that's what I did with the 3kva VIL inverter whose fan only kicks in at 65°c. I connected the above and placed it to blow air into perforated side vents near the inverter transformer. fan only works when inverter is working. the inverter is much cooler now. OR most fans in these portable inverters are evacuators not blowers. the fan is not powerful enough to evacuate heat build up hence increase in internal temperature. can you change direction of flow of the fan, so it sucks outside air and blows over internal components rather than evacuate it? Just reverse/flip placement of the fan. ensure some gaps exist in the casing to allow hot air flow through. |
Re: Solar Energy, A Complement To FTA by lexi28(m): 2:41pm On Aug 11, 2019 |
NiyiOmoIyunade: Mr Niyi. I think your explanation fits the phenomenon more. before such abnormal readings of the same device can be accepted, I would prefer a control experiment. same setup, 2 different watt meters. most likely calibration issues. I believe the wattage of a device at any voltage remains the same, otherwise ohms law becomes void. Energy cannot be created nor destroyed. we only have to account for losses in the system. all generators I know have a slight voltage drop with increase in load. so a generator is not a stable power supply to base such calculations on. the issue of a 24v 1kva inverter powering up a load that the 12v version will not power is a not valid as components are different and the surge capacity of both inverters have not been verified. A 1000w load showing 500w on the wattmeter while run on a 24v system? very weird. it is the current that should be halved not the overall power. personally, I once had a wattmeter connected when phcn decided to give fluctuating voltages. the wattage of my TV remained the same as the voltage & current kept up with their inverse relationship. all the way from 350v to 165v. that's my take. |
Re: Solar Energy, A Complement To FTA by harizonal123(m): 3:36pm On Aug 11, 2019 |
eleojo23:Chat |
Re: Solar Energy, A Complement To FTA by ojeysky(m): 6:26pm On Aug 11, 2019 |
Namzy: Am really interested in this freezer, I currently have a 5 years old thermocool ccf-219t which is rated 140w but recently went bad and my technician here did some guess work that made it start working but since then it's been operating on 200w and performance has even degraded. If I may ask, does the hisense have interior lights and fan? Have you tried checking how long items remain in it before it gets defrosted?
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Re: Solar Energy, A Complement To FTA by Namzy(m): 7:17pm On Aug 11, 2019 |
ojeysky:It has interior light. Don't know what you mean by fan. As for how long before defrosting, I have not checked but I think my other thermocool is better. But the defrosting depends on a number of factored mostly how much stuff is inside said freezer as more will make them defrost less. Meanwhile because of its wattage its on for about 15 hrs daily so that might also contribute |
Re: Solar Energy, A Complement To FTA by ojeysky(m): 7:31pm On Aug 11, 2019 |
Namzy: My thermocool has a fan, light and buzzer under its lid; this ensures there is equal distributed temperature within the freezer (I love the freezer unfortunately I lost all the features in the hands of kazeem few months ago when it developed a fault). What's the consumption of your other thermocool?
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Re: Solar Energy, A Complement To FTA by Dishtech(m): 8:43pm On Aug 11, 2019 |
ceaser:I can but I hadly have chance. |
Re: Solar Energy, A Complement To FTA by olaolu11(m): 8:59pm On Aug 11, 2019 |
microgiant: I searched the product and even got the chinese manufacturers website. From what i read, i am not clear about an issue. Is this inverter car charged or solar/generator charged? Thanks |
Re: Solar Energy, A Complement To FTA by olaolu11(m): 9:14pm On Aug 11, 2019 |
microgiant: Car battery charger. Is it powered with car, phcn/gen or solar
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Re: Solar Energy, A Complement To FTA by olaolu11(m): 9:27pm On Aug 11, 2019 |
The 219H is chest freezer while the other is giant fridge. How many watts will bith consume per day if i on them for 4hrs every other day?
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Re: Solar Energy, A Complement To FTA by eleojo23: 10:39pm On Aug 11, 2019 |
olaolu11:What's the maximum charging voltage? I read somewhere that it reaches 15.5v |
Re: Solar Energy, A Complement To FTA by harizonal123(m): 5:35am On Aug 12, 2019 |
eleojo23:The highest I have seen my own display is 14.5v while charging & battery voltage always finally reads 13.4v when it is full |
Re: Solar Energy, A Complement To FTA by ceaser: 7:13am On Aug 12, 2019 |
ojeysky: Bro if this freezer is really what Namzy claims, then it's the bomb. Just go for it. Just make sure you go shopping armed with your wattmeter for proper confirmation. Other factors worthy of considerations though, will include the number of hours it is able to keep foods frosted off power (a factor of insulation), cos you can't leave it working overnight. Also in the rainy season are days of poor solar harvest which ma require some shedding. In such times, good insulation of cabinet freezers come into play. I'm not happy now cos I should have heard about this freezer 6 months ago when I secured that Thermocool. But going forward, I think I will take more notice of some selected Hisense products in power saving capacity over Thermocool and LG products that I have grown fond of. |
Re: Solar Energy, A Complement To FTA by ceaser: 7:18am On Aug 12, 2019 |
ojeysky: If the condenser is changed, the new one may not be a good power saver as the stock. Also these Kazeem technicians will install fan once they work on any freezer. That's added consumption. |
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