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Nairaland Forum / Entertainment / TV/Movies / Satellite TV Technology / Solar Energy, A Complement To FTA (2272316 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 adrusa: 3:02pm On Jan 28, 2020 |
Yes. The contactor will do the switching of the pump. The float switch will just switch the contactor. That way the high current needed to drive the pump will go through the contactor while only the very small current needed to switch the contactor will pass through the float switch. That way you will protect the float switch and not need to change it too often. I haven't had to change my float switch for about 5 years now. If the float switch powers the pump directly, it will get burnt and need to be replaced very frequently. dejidotun2000: 2 Likes |
Re: Solar Energy, A Complement To FTA by adrusa: 3:05pm On Jan 28, 2020 |
I use contactors frequently in my setup. I found them a better way to switch high current rather than replacing switches frequently. My normal switches just switch the contactors, not my loads. adrusa: 2 Likes |
Re: Solar Energy, A Complement To FTA by durodee(m): 3:21pm On Jan 28, 2020 |
adrusa:Oga, can you please draw a schematic outline for us non-technical people? Gracias ! |
Re: Solar Energy, A Complement To FTA by adrusa: 3:29pm On Jan 28, 2020 |
durodee: Below is a schematic I pulled from the internet. The contactor is wired as shown. The two switches, red and green are the two switches that control the contactor. When they are both on, the contactor closes and supply power to the pump. To use it for float switch or as a switch, you keep one of the two switches closed by connecting the terminals together without a switch in-between. Then you connect the float switch (or any other switch) to the second switch. When your tank is full, it pushes up your float switch and makes it horizontal. This will disconnect the contact in the float switch and switch off the contactor. When the float switch drops and becomes vertical, the contacts will be made and switch on your pump. I actually leave the other switch connected so that I can turn off the contactor/pump whenever I wish. If you don't connect the second switch, you will have no control over the pump, only the float switch will do the control. 6 Likes 1 Share
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Re: Solar Energy, A Complement To FTA by ceaser: 5:14pm On Jan 28, 2020 |
adrusa: I assume that by contactors, you mean Relay switches, yes? |
Re: Solar Energy, A Complement To FTA by adrusa: 5:56pm On Jan 28, 2020 |
ceaser: Well, they work on similar principles but they are not exactly same. Contactors tend to be bigger, more powerful and work with higher power (current and voltage) compared to relays. https://www.springercontrols.com/news/contactors-vs-relays/ |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 8:14pm On Jan 28, 2020 |
Runx: Post it... Or just tap that link to connect to my whatsapp instantly. |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 8:15pm On Jan 28, 2020 |
Solardepot: Whats the salary range? 1 Like |
Re: Solar Energy, A Complement To FTA by durodee(m): 8:22pm On Jan 28, 2020 |
Thanks. I will study this. adrusa: |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 8:25pm On Jan 28, 2020 |
justcallmenuel: Naija! Where is the module Voc na? 6 Likes |
Re: Solar Energy, A Complement To FTA by Topmost11(m): 12:30am On Jan 29, 2020 |
Trippledots: Oversight? Anyway he made us know it is naijamade. How many will remove the sticker and then sell as other maker? |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 6:09am On Jan 29, 2020 |
Topmost11: yeah, thumbs up for his honesty. Na the manufacturers gan gan be my problem. How do you "forget" to include a vital spec on an electrical device ![]() 1 Like |
Re: Solar Energy, A Complement To FTA by justcallmenuel(m): 7:41am On Jan 29, 2020 |
20amphs smart battery charger available, #14000. Contact us on 08168986461
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Re: Solar Energy, A Complement To FTA by kiekie1(m): 10:41am On Jan 29, 2020 |
1 MONTH PROMO OFFER! Quanta 12v 200a made in India battery . Direct India quality standards with attached warranty card ! Weight : 64/65kg "see attached snapshot" ! Unit price : 117,000 8 units above : 115,000 Contact, Smartcell global services 081-350-31951 WHATSAPP::: https:///2348170385620
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Re: Solar Energy, A Complement To FTA by Barezzi(m): 12:28pm On Jan 29, 2020 |
I put a timer switch in series with a victron BMV-712 battery monitor relay across the second switch(NO) as permissive to energize the contactor/operate the pump. The timer switch is set to close between 12pm to 1.30pm, while the BMV-712 is set to close at SOC > 85%. The pump will ONLY switch on between 12pm and 1.30pm as long as the battery SOC is above 85%. You don't want your pump switching ON anytime it likes, simply because water level is low e.g during the rainy season or poor weather. I can manually override the timer and BMV by simply activating the NO switch. The float replaces the NC switch. adrusa: 5 Likes |
Re: Solar Energy, A Complement To FTA by Barezzi(m): 12:47pm On Jan 29, 2020 |
Go a step further and put a NEPA driven relay across the BMV 712 relay so that between 12 and 1.30pm if the battery is still low but NEPA is available, switch on the pump if low level is detected. The tinkering never ends ![]() ![]() ![]() Barezzi: 4 Likes |
Re: Solar Energy, A Complement To FTA by Im2Busy2Bother: 6:21pm On Jan 29, 2020 |
I'm looking for a charger which I can use to charge a LiFePO4 battery with a maximum charge voltage of 15v. Also, can anyone please suggest a good inverter for LiFePO4 batteries for 12V system or 24V system. You guys are doing an amazing job here. Thank you all. |
Re: Solar Energy, A Complement To FTA by simydan(m): 7:15pm On Jan 29, 2020 |
Im2Busy2Bother: Lifepo4 chargers are actually rated at 14.6V for 12V Lifepo4 battery but what is most important is the continues charging current design for your battery. You will get the right charger if you can state you battery voltage and charge current. For inverter, any pure wave sine inverter will work fine as long as you're not using it to charge your Lifepo4 battery. Also, you battery voltage will determine whether your inverter will be 12V or 24V 1 Like 1 Share |
Re: Solar Energy, A Complement To FTA by adrusa: 8:25pm On Jan 29, 2020 |
Barezzi: Good point. My setup at this point is similar. But, I use Home Assistant and Node Red to set up an automation that switches on my pump between 10am and 3pm if my SOC is 86% and my current to battery is higher than 10A. But when I was using NEPA to pump water, I allowed only the float switch to do the control. By the way, the node red and home assistant also run my water heater between 12noon and 4pm if my SOC is 96% and above and my battery current is higher than 20A. 1 Like
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Re: Solar Energy, A Complement To FTA by ojeysky(m): 11:06pm On Jan 29, 2020 |
simydan: You may want to ensure not to charge lifpo4 at that high voltage if lifespan is of importance. Here is another writeup that further confirms this: https://www.google.com/url?sa=t&source=web&rct=j&url=https://2n1s7w3qw84d2ysnx3ia2bct-wpengine.netdna-ssl.com/wp-content/uploads/2018/04/Lithium-Iron-Phosphate-LiFePO4-Generic-Charge-Settings.pdf&ved=2ahUKEwjy4P6M5annAhVPilwKHeWoDQ0QFjAZegQICRAB&usg=AOvVaw0YeP6Q7vas8DXPnnDzE3tn&cshid=1580334738676 |
Re: Solar Energy, A Complement To FTA by Trippledots(m): 11:09pm On Jan 29, 2020 |
Barezzi: AND gate in action... ![]() |
Re: Solar Energy, A Complement To FTA by simydan(m): 12:10am On Jan 30, 2020 |
ojeysky: Sir! I can boldly say base on CC/CV charging sequence of LFP the charging voltage you'll find on most LFP chargers for 12V LFP battery are rated 14.6V what you really need to pay attention to is the charging current, make sure the current does not go higher than that stated on the battery parameter. How ever, BMS play a very important role in LFP for cell balancing, over voltage and over current protection, etc... You may need to intensify your research to be sure. It is for this reason some inverters and CC are built with LFP charge options and once you select it then you can't modiify it. It will charge according to the battery voltage. In my case, my LFP charger is 14.6V 20A CC/CV and my battery does not change above 14.4V. You can read through this: https://enerdrive.com.au/2017/11/29/can-charge-lithium-battery-lead-acid-charger/ |
Re: Solar Energy, A Complement To FTA by Im2Busy2Bother: 3:52am On Jan 30, 2020 |
simydan: It is a 12v system, the battery spec sheet said it can be charged to 15v, but I thought that was a little bit of a stretch as I've seen many LFP rating to be that of 14.6V simydan: Can you share the link where you bought this charger? Thank you. |
Re: Solar Energy, A Complement To FTA by ojeysky(m): 5:01am On Jan 30, 2020 |
simydan: The point is not that it can't be charged up to 14.6, my point was that charging at that voltage all the time do have a long term negative effect on the battery. A car speedometer calibrated to 200km/h does not mean one should step on the gas up to 200km/h... Even if you have a road to achieve that all the time, the wear and tear sets in earlier than envisaged. "Third, there isn't much difference in capacity when charged at 3.4V or 4.2 volts" https://www.powerstream.com/lithium-phosphate-charge-voltage.htm It's not a coincidence that lifpo4 makers such as pylontec batteries that are considered superior (mostly for life span) sets a voltage within the 13v range: https://www.cclcomponents.com/blog/pylontech-batteries-us2000-us3000-lv-hub/ Eventually I guess we make our individual choices Sir 1 Like |
Re: Solar Energy, A Complement To FTA by tsmall(m): 8:43am On Jan 30, 2020 |
FX2024ET (2kva/24v) OUTBACK Inverter with Mate 2 going for a good price. (Used) 07033311179
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Re: Solar Energy, A Complement To FTA by simydan(m): 10:12am On Jan 30, 2020 |
Im2Busy2Bother: Mine came with the battery but, its similar to this one: https://m.aliexpress.com/item/32885613130.html?pid=808_0000_0101&spm=a2g0n.search-amp.list.32885613130&aff_trace_key=&aff_platform=msite&m_page_id=56amp-qoV0m0yoHCFCyt76LXrS9Q1580375075349&browser_id=03c28e6a32d14efea3d87b895d3f66e5&is_c=Y You can order this one if the charging current does not exceed your battery charging current. 1 Like 1 Share |
Re: Solar Energy, A Complement To FTA by Im2Busy2Bother: 7:19pm On Jan 30, 2020 |
simydan: Thanks a lot. You rock. Hope you are enjoying your lithium battery. |
Re: Solar Energy, A Complement To FTA by simydan(m): 9:36pm On Jan 30, 2020 |
Im2Busy2Bother: You're welcome sir! Yes, really enjoying LFP die!! ![]() ![]() |
Re: Solar Energy, A Complement To FTA by tsmall(m): 11:42pm On Jan 30, 2020 |
tsmall: Give me a good offer. |
Re: Solar Energy, A Complement To FTA by quest4s: 9:20pm On Jan 31, 2020 |
GURUS PLEASE HELP Inverter 24v 2.5kva vs 48v 2.5kva which is better or is there no difference |
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 9:36pm On Jan 31, 2020 |
Given thesame design ethos, in terms of what they can power not much difference. In terms of cost, you may spend a bit more on the 48v 2.5kva setup as you will need 4 units of 12v batteries to run 48v vs 2 units of 12v batteries with the 2.5kva. Holding battery capacity needs constant, if standard battery size was 12v 200Ah, you could bring the cost of a 48v system down by using 4 units of 12v 100Ah. You will likely still spend a bit more as the bigger size batteries are usually cheaper per Kwh. quest4s: |
Re: Solar Energy, A Complement To FTA by quest4s: 10:25pm On Jan 31, 2020 |
Thanks I am just a bit skeptic as how efficient the 24v will be as against 48v which supplies more power and possible produce a better pure sine wave please correct me if am wrong is my assertion NiyiOmoIyunade: |
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