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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:42pm On Jun 28, 2019 |
teamman: Not to speak negatively about the batteries. They are a great product but the Lithium versus lead acid debate has a nice example These are C100 batteries so 480 AH battery should be used for 4.8 Amps ( so for a 48 V bank ) that is paltry 250 watts to achieve full capacity at C10 rates ( 48 amps or 2500 Watts) the capacity drops by 35 % ( 319AH/486) They are best used for low loads large runtime applications such as offgrid 2 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 1:10pm On Jun 14, 2019 |
bigrovar: T[b]he lithium raw material in a Li-ion battery is only a fraction of one cent per watt, or less than 1 percent of the battery cost. [/b]A $10,000 battery for a plug-in hybrid contains less than $100 worth of lithium. Shortages when producing millions of large batteries for vehicles and stationary applications could increase the price, but for now this is not the case. https://batteryuniversity.com/learn/article/availability_of_lithium The prices are bound to drop as the production ramps up and more players enter market - The cost of Lithium battery comes from clean production processes and not the raw materials Attached is a nice video explaining the challenges . That is the reason the semiconductor/ chip suppliers were ahead of the race ( Samsung, LG, Pansonic, Sony) but Chinese companies are catching up ( BYD... etc) https://www.youtube.com/watch?v=z2819K8_m7c AThe Bloomberg survey gives a nice overlook since 2012 - https://about.bnef.com/blog/behind-scenes-take-lithium-ion-battery-prices/ P.s -Gambia is planning a 8 MWh battery bank to work with 20 MW PV power plant to offset the diesel production currently powering the country - Imagine trying to achieve that with lead acid and the environmental impact of such large quantities of lead 6 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 3:24pm On Jun 06, 2019 |
HeartforGod: a very nice article to get you started https://www.victronenergy.com/blog/2015/03/30/batteries-lithium-ion-vs-agm/ Victron Make both normal ( GEL.AGM) and Lithium http://bluenova.co.za/wp-content/uploads/2016/02/BlueNova-Launch-Presentation-V2.pdf 1 Like |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 10:50am On Jun 04, 2019 |
earnvest: Yes I am interested 2 No.s How will you handle shipping |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 4:46pm On May 21, 2019 |
wirinet: if you cycle the LiFepo4 between 3.5 and 2.6 ( instead of 3.6 and 2.5) essentailly you are not using the full capacity and hence the cycle life will go up One much less understood point about lithium batteries is after the end of cycle life the batteries can be still used for less demanding applications ( less current and less reliability) as there is still 80 % capacity left while LEad acid will have to be scrapped or recycles completely;y |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 10:15am On May 19, 2019 |
tsiriman: You can get a luminous 1500 VA solar hybrid. With 24v battery you can even save the battery cost https:///product/luminous-luminous-1-5kva-solar-hybrid-inverter-4193884 |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 8:38am On May 18, 2019 |
tsiriman: If planning solar upgrade in future Ipower [zinnox] is an option if your loads are only tv and fridge plus lights you can easily use a victron 800 VA which can Handel 1600 watts short time loads and much more efficient apart from reliability You can even optimise buy buying only 2 batteries for 24v but higher ah https://www.ebay.co.uk/itm/Victron-Mini-Inverter-Charger-Multiplus-12-24-48V-800VA-230V-FREE-EU-Delivery-/302428570028 |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 8:27am On May 18, 2019 |
earthrealm: Check if the controller Voc will allow three panels in series and then use only one controller |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:49am On May 14, 2019 |
desiji: I had a sonoff lying around for my exuast fan . Flashed Tasmota a while back to use with Hassio . Got APM from ICC - ( Manie) He made and exception for me . Normally they will not sell standalone APM licence - only with Hardware Infact I am working with him to get the TH16 recognized in APM so temp and humidity can be shown in APM and also to get APM recognize $ channel sonoff |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:41pm On May 13, 2019 |
hisenjos: Interesting- What is the cycle count for battery Please note all lithiums are not designed for off grid duty and can have shorter lifespans infact the austrailan test center doing rapid /acclelated testing has intereting results for even best brabds like Tesla or Samsung incidentally in lifecycle and efficienecy BYD comes out on top https://batterytestcentre.com.au/ Quote --------------------------------------------- In terms of performance, several batteries are performing well and are meeting claims made by the manufacturer. For example, the Sony & Samsung battery packs from Phase 1 exhibit low rates of capacity fade, despite over 1,300 cycles having been completed. The capacity of the Tesla Powerwall 1 has degraded more rapidly (potentially due to higher charge/discharge rates – see Section 2.1), but it has also completed the most cycles of Phase 1 battery packs, demonstrating its reliability. Of the Phase 2 battery packs, the BYD battery pack has completed the most cycles and demonstrates the lowest rate of capacity fade, suggesting both reliability and longevity. Nonetheless, the trial continues to reveal performance and reliability issues with some batteries. In most cases the issues can be attributed to inadequate product development and/or a lack of understanding on the part of local salespeople/technicians in regard to product integration (ie. with inverters or control systems). These are symptomatic of new technology and a new market, and should improve over time. https://batterytestcentre.com.au/ |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:31pm On May 13, 2019 |
Godliftedme: |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 4:54pm On May 09, 2019 |
My latest project� . The AC power ( Daikin inverter AC) is controlled by a SONoff TH16 ( flashed with Tasmota firmware) The TH16 controller is controlled by the APM ( advanced power management) software based on how much load the battery is seeing. Below -10 Amp draw means either NEPA available or solar is sufficient more than - 16 amp ( 48 V battery) means other loads are high enough to switch off AC Control by other parameters such as battery voltage, SOC, grid power, wattage also possible THE APM software is made by the same South African guys who make ICC to interface with Aexpert /Voltronix /Ipower and BMV the Aexpert use can use similar seup to control things like water heater or for that matter any other loads - Maxium four independent units can be controlled The same can also can be achieved without APM using NODERED but requires deeper JSON/Python understanding 3 Likes
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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 5:56pm On May 05, 2019 |
chris81964: Generally for Nigeria you can multiply by 4 the panel Peak watts to get avg daily production so a 1 Kwp will give you 4 KWH of energy See attached yield for well-installed system in Lagos and Abuja ( divide monthly numbers by 30 ) to get avarage daily yield The lower yield numbers on the top chart is lagos offcourse. The numbers take into account various other factors such as windchill, temp/humidity over last 10 years to arrive at a fairly accurate estimate. You will notice that the Avrage yeild varies significantly based on the calender month 2 Likes
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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:01pm On May 03, 2019 |
earthrealm: Blue camel Kaduna most probably has repair facility but may not be worth the efforts for a singel panel https://bluecamelenergy.com.ng/services/bank-atm-power-ups-systems/ |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:33pm On May 02, 2019 |
Desanta: flat mode I wonder if it flattens the battery in short time . But on a serious note if you want to know the exact quantity then you need Coulomb /AH meter some of the good options are https://www.amazon.com/gp/product/B07FGFFHC6 https://www.aliexpress.com/item/colorful-lcd-display-Battery-Coulomb-counter-DC-voltage-ampere-watt-capacity-energy-W-AH-meter-78/32914014075.html https:///product/fangpusun-lcd-display-battery-monitor-bmv-702-12v-24v-48v-3729905 https://www.victronenergy.com/battery-monitors/bmv-712-smart |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:17pm On Apr 30, 2019 |
NairaBaba: Not for Solar production. SOC and voltage is not directly related to solar production in Inverter charger setup. if NEPA is available the inverter will keep the battries charged so Solar is still idling Using SOC to optimize smaller loads like Refrigeration and pumps will not optimally work as the PV production can change every minute and may not match the load profile cycling the battery unnecessarily - ( every unit /KWH from battery will cost you 50 NGN while solar will be producing at 25 to 30 NGN so it makes sense to optimize the battery not solar The only way to fully optimize excess solar production is to monitor incoming power and solar production and use AC coupling in off-grid setup USE Battery, voltage /SOC to run a large load like water heater makes sense if the energy gain is significantly high However, the easiest way to do this is if you have a charge controller with load output - e.g. epsolar/morningstar/victron - The load output can start a relay which will control opportunistic loads such a water pumping / AC/water heating - https://www.youtube.com/watch?v=vvNk-VBbCRU see the clip I made earlier where the system only takes 100 watt from grid and balance from solar 2 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:48pm On Apr 29, 2019 |
mank1234: Not unless you have faily advanced systems like Victron, SMA or fronius which allow programming of auxiliary relays 4 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:19pm On Apr 26, 2019 |
Wazari: In my opinion, Lithium makes a cost effective scenario if you have fairly stable Nepa ( atleast 10-12 hours a day) and/or a diesel generator with your solar . In such a scenario you can severally undersize the lithium ( using ESS) but still cycle the lithium to maximize the solar use unlike pure offgrid or standby applications The lithium charges by a factor of 3-4 times faster allowing you to reduce use of gen or running your solar on PEAK .. e.g in my case a 10 KWH battery can charge at 7 KWp ( 140 Amps DC) from my solar but to utilize 140 amps charge rate I will need 1400 AH in Trojan ( C10) i.e. 7 x 4x 120,000 NGN= 3.3 million - which is the same cost of 200 AH Lithium What the lithium brings for me is the peace of mind that I do not have to worry about equalizing, water topping , if the battries are discharged or fully charged etc. ( i have on few occasions run my battery down to 2 % SOC and charged in the morning after the sun has comeup without any adverse effects p.s. In my own case I have 10 KWp solar , 20 KVA GEN and 15 KVA + 6 KVA ( 3 phase) inverter all supported by a small 10 KWP/ 10 KWH BYD Imagine how much space a 28 battery trojan setup will take and yes the battries are ensured a good ventilation by using exhuast fan No airconditioning is needed . Although I am thinking of adding 5000 BTU solar operated unit to keep the inverters cool if I can find the correct unit . 1 Like |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 8:58pm On Apr 19, 2019 |
ojeysky: Please let us know. That would make life easiser |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 3:42pm On Apr 17, 2019 |
earthrealm: When I asked few months back to SHOPtomydoor for BYD lithium they refused to handel Bigger lithium. If they agree let me know as theier ocean service is great My favorite vendor Zerohomebills ( UK/USA) virtually ships anywhere in the world by air and seafreight including BYD battries https://zerohomebills.com/ |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 9:04am On Apr 15, 2019 |
makavele: By the looks of it the wires melted damaging the terminal. A loose connection or insufficient area contact can do that 5 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 2:33pm On Apr 02, 2019 |
GeorgeD1: @GeorgeD1- Thank you @ samnaija -- I have a 120 Ltr Simba and 50 Ltr Protek. i can assure you that all of them are exact same probably made in some china factory . Further proof is that all of the aliexpress water heater acessories I bought such as heating element, level controller , inlet valves fit perfectly the design specs protek has also recently started stocking booster pumps and controllers so if you do not want the D.I.Y aliexpress route then protek may be a better bet despite the suspect service delivery on the other end of the spectrum, Ariston stocks quality solar water heaters but you pay the price for good materials. considering NEPA @ 25 NGN a water heater for 400-550 K NGN does not make sense chinese is a better option( VFM) 4 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 5:22pm On Mar 13, 2019 |
Need a technician with prior experience of working on Electric forklifts ( Toyota) Somebody just contacted me to start a 3 year stranded brand new Forklifts. They have never been used so I guess the batteries will be dead Any specialists in the house with prior experience on working high POWer DC applications
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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 5:17pm On Mar 13, 2019 |
Jinko announced 450 Watt Panel !! The Perc technology panels ( 300 watt to 350 Watt) will soon give way to NGT ( next generation technology )High capacity panels . Even SunPower has launched a 415-watt panel and so has LG remember the PMPO wars in the old stereo days between SONY/Aiwa/Philips /Technics https://www.pv-tech.org/news/jinergy-touts-heterojunction-module-breaking-450w-at-pv-celltech-conference -------------------- https://news.energysage.com/400-watt-solar-panels-are-they-right-for-you/ 3 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:09am On Mar 11, 2019 |
duwdu: I am also sure the Canadian solar will also have better and linear degradation over time ( normally 80 % capacity retained over 25 years) compared to flame |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 12:08pm On Feb 28, 2019 |
mktinsight: I believe a central system with regulation on individual flats is cheaper and easier to maintain in the long run. The load /utilization factor ( diversity ratio) is much lower for 6 flats combined than a single one and will result in overall lower battery size. Also, it may be much easier to support a single system with a small generator in the short run than to build a large system from the start 1 Like |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 11:59am On Feb 28, 2019 |
Dam5reey: The power saving works only if the solar is connected to the NRG 1500. What you will have to do is manually cut off the Grid to the inverter so the solar is utilized by inverter. A better approach will be to connect at least two panels to the inverter and rest to External CC. That way when the batteries are charged ( and solar available as sensed by inverter based on PV input) it will automatically revert to using battery instead of grid and change to grid in the evening if the solar disappears or the battery is discharged (I believe it changes state when 50 % SOC is depleted but I am not so sure) personally, I am using the inverter to supply security cabins with 20 inch TV, DSTV decoder, standing FAN and 4 LED bulbs coupled with 250 W x 2 panels and 200 AHx 4 12 V flooded luminous ( 5 old batteries from my own setup) 1 Like |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 9:26pm On Feb 26, 2019 |
Namzy: if the inverter is charging at 15 amp in presence of grid then the CC will only contribute 5 amps if the grid is not available then CC will add max 22 amps ( max C10 charge rate) if set higher the battery life will be reduced. It is an overkill to add separate CC considering the 1500 VA inverter is actually a 900 Watt inverter at 25 DEG C |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 9:22pm On Feb 26, 2019 |
mktinsight: If it the NRG 1500 I have installed a couple of them. Beware that the CC is not delivering 40 amp to battery. the charging current is limited to max 15 Amp in fast charge mode and 10 amp in Icharge ( efficient mode). The reason is the inverter is recommended to be used with 150 Ah x 2 tubular flooded batteries in India. Unless your NEPA is stable you will take a long time to charge 200 AH at 10 amp The higher wattage of solar panels although can be used by the inverter to supply to load in Eco mode ( activated using white push button) even if grid is available |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 1:42pm On Feb 25, 2019 |
kiekie1: Could I suggest a simpler and more elegant solution? since the item is too much even for interested parties to look at . Put all items in an excel file with drop down to sort by category - The file may be easier for you to maintain and users to use( e.g. forward to friends, associated while recommending you as a supplier) Either attach the file to post or store it on google drive/dropbox and only post with a link along with your contact deatils and promotional message You can highlight only newly added itms or priceses dropped significantly ( say 20%) in the post to grab attention of users wbr Anil 7 Likes |
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 11:39pm On Feb 18, 2019 |
ojeysky: The MPP solar mentions 120 to 450 V DC as MPPT range with ideal as 240 V DC for max efficiency and max 500 V DC for series connection Min you need 120V / Vmpp of panel and max 500DC /Voc of panel - best combo is 250V DC/Vmpp of panel Also take care when selecting fuses /breaker etc . They must be rated 250 or 600 V DC based on your final selection . may of them in market like midnight solar are rated only upto 150 V DC
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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by pranil(m): 11:31pm On Feb 18, 2019 |
NiyiOmoIyunade: Knife switch definitely NO I don't recommend it even for AC they tend to get loose and create hotspot after frequent use . Also Knife switch will not only arc but continue arcing after opening on heavy load typically AC contactors for DC duty are derated despite having ARC chute ( by 1.41 RMS ratio) also normally the arc chutes for DC are different to limit high voltages which might damage the connected equipment The attached ABB article explains in detail
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