Queed: Very possible, in fact I have built many of such system.. It a matter of writing code that will searching for that sweet spot and hanging around there for a while.
Yeah, that's one way. Mine was more brute force like. So I noticed that if you have a PV connected to a buck converter or smps, it finds the MPP and gets stuck there, if there is a change in irradiance and you disconnect and reconnect the PV, it automatically jumps to the new MPP. So that means if you have a steady switching period you can always find the MPP without much codes or circuitry.
Did some reading and saw one method of hunting MPP is perturbation which I think supports my observation.
I don buy some mosfets and a timer to test it out, but no time to play. 😂
LibertyRep: What's the fuss? Is it because it's Oyedepo or what? Public officials have retinue of security personnels guardian then so what's wrong with an individual arranging for his own security?
Jesus' disciple once asked him if they should strike in his behalf to defend him from enemies. He told them to sheath their sword that if he needed protection he could commandeer angels....and here is a supposed servant of that same Jesus Christ with security guards everywhere.
I hope you can connect the dots and get the drift.
The usual xl4016 based 300W ( 8A ) buck converter can take up to 38V max out of the box or up to 45V max ( with some slight modifications on the buck converter). Most online spec will indicate up to 60V out of the box, but when you investigate the surrounding electronic built on the converter, you'll quickly realize that it's false.
The usual 20A buck (can't recall the IC name) is more efficient as it incorporate FETs for both it forward and flyback cycle as against a FET and a diode used in the xl4016. It can take up to 42V out of the box, and these things are not built equal.. you'll most likely never get beyond 15A max from the best builds.
Combining a buck and pwm controller generally gives better result than using only a pwm controller (if set up properly). But not close to being an MPPT as the perfect load point will always change and no means of compensating for the drift.
So to answer your question, yes you can, but watch out for the VOC.
Regards.
😊 I like when I read posts from informed minds. You really understand how buck and mppt controllers work.
I have a conceived a way of making a normal PV to buck converter work and hunt for the MPPT point. Theoretically and maybe partially practical since I have tested the idea partially. Unfortunately I no de get time these days to play with electronic equipments as I like.
Please I have a 1.5KVA 12V Inverter, 2 220 tubular batteries connected in parallel, 60Ah Felicity Mppt Charge Controller, 100W panel 6 and 300W Panel 2. Can this panel comfortably charge the battery to full during the day or is it a must I get an extra panel?
Check the power factor of the UPS also, so you don't end up buying something that wastes energy. The UPS is not built or optimized for long backup periods
606thearena: Hey guys pls I need advise on how to get a trusted dealer for solar kits in Lagos or Benin . I want one luminous batters tubular 220ah or any good Batery brand . Felicity 2.5kva inverter 250 watts Canadian panel . 4 Felicity charge controller 60amps Wires 6mm
Canadian panels are arguably the most counterfeited panels out there. I can help you get these items or even suggest other good alternatives.
bigrovar: I have very little context so pardon me. I am responding to this purely on the face of the comment. I have been a solar user now for over 8 years. My first system was a 1.2kw (inverter) paired with a 480w solar and 2 Tubular batteries. That system paired with the grid was able to power basic house loads including a 130L chest freezer. The freezer ran for 4 hours a day.
I later upgraded the inverter to 2.4kw (Axpert inverter) and pared it with 1.8kw solar (and same Tubular battery as before) and ran the house completely off-grid from this setup for over 2 years (no NEPA setup)
In all I ran a 24v system from 2016 - 2022 and had most of my basic loads like fridge, freezer, occasional microwave, occasional ironing etc.
Of cause I did not run all the powerful loads all at ones but my point is, design design design. System design is 80% of the work on solar.
Key is performing a proper energy audit. Designing your system around the result of your energy audit. I used 2 tubular batteries, 2.4kw inverter and 1.8kw solar panels to power a 2 bedroom apartment completely off-grid and I lived quite comfortably (as comfortable as you can live without AC LOL)
Even now with a much upgraded system, you can check my daily usage averages at about 1.5kw (when I have 1 AC a freezer, fridge, fan, lots of computers - running in my home lab including a 64 Terabyte NAS with 64g ram and 8 core AMD Ryzen) all of this is running on less than 2kw and when AC is off house load drops to less than 1kw. My VRM numbers is there for anyone to see https://vrm.victronenergy.com/installation/453590/share/df9180a7
People don't use as much power as they think. It is fine and very possible to use a lean prudent, low power system you just have to have the whole system well designed from load to generation to storage.
I usually wonder how these very affordable systems cope when there is no sun and no grid. Especially based on the intended load.
Has anyone used similar setup for atleast a year, and what are their experiences?
Btw, this company is growing fast! And I am studying them make I too fit grow my own 🙂, but some of their solutions look really undersized. I may be wrong.
HawkTuah: The truth is I have to beg him and explain my situation to him.
I work at home and I need like 16hr constant everyday power to at least 1 out 3 laptops.
I was just frustrated, I just bought half engine for the generator and another 9 cell dell battery costing over 120k. And oando fuel station where I dey manage buy cheap fuel was no longer selling.
That's when my eye opened that I should have gone solar. That 120k should have been in my pocket.
I told him how I suffered to power just one laptop. I asked him to couple 50ah, 500w. But he convinced me to go 100ah that I will enjoy it
I am still enjoying it, I don't intend to power beyond the laptops. It's doing great job.
What if the battery is not up to 100mah, it's difficult to know what was coupled inside the box. That's my concern.
A capacity test should give you an idea.
If you factor the losses from your inverter, add that to a known electrical load and use it to measure how long the battery lasts.
Penuelseun: How many cells do you have in series? Max charge voltage for 18650 cells 14s is 58.8, that is 4.2v × 14, but it is better to charge to 4.0v per cell to prolong the lifespan of your cells. Cut off should be 3.0v per cell which is 42v.
What if they are not 18650 cells? I saw a li-ion pack doing 57v top and 48v cutoff. What can be improved about that charging profile?
zenith4biz: Locally I doubt, I scouted through the market I couldn't find any except those DC ones which I don't like, the only available option is the infrared cooker with adjustable wattage
If I had the means, I would opt for a DC cooker with a battery and solar panels specifically for that setup. That's more efficient energy wise, as all your energy use is only as DC and purely ohmic, so energy conversions are way more efficient.
Ijeoma660: This week we got news that we have finally been dumped on Bandit A.
I immediately removed some of the few things still left og EKEDC to inverter.
1. Electric boiler - moved 2. Microwave - moved 3. Outdoor security lights - Pending when electrician comes 4. Washing machine - partially. I use extension box.
Observation. -So far so good, its going well. - I recorded harvest peak at 3.3kW for the first time too. - My solar panels are split in two separate locations. The ground mounted has started seeing better radiation.
Bandit A... 🤣 😂 😂. With this installation I would have an inverter AC running though.
justcallmenuel: 22pcs of 220Ah Tasha tubular batteries. 24pcs of 300w africell solar panels 1pcs of 10kwh felicity lithium battery 1pcs of 7.5kva felicity inverter 1pcs of 120A felicity mppt controller, ready for delivery to IKOYI.. Thank you my boss for the continuous patronage, God bless you.
Call/whatsapp me on 08168986461
Keep placing your orders thank you.
22pcs of tubular, heh?! How Dem wan do water top up? What if batteries in the array start dying one after another.
If na me, I would not recommend Lead acid at this level of installation sha. But installers of timbre and caliber naim plenty pass.
Carparts888: Its been a while i visited nairaland and i decided to visit today and check the auto section and boom! I see RIP GAZZUZZ! MY heart raced and i felt a cold sensation while processing this news. I feel terribly sad on his demise.
I was privileged to meet gazzuzz a few times some years back. We met through a group chat then before we became friends and met in person. We had drinks together whenever we met at ogba or Ikeja and i remember how he always buy shawama to bribe his "madam" as he fondly calls his wife when we stayed out late and she starts calling.
He was very kind and one of the most honest person I met in my life. He helped me financially whenever i told him i was broke "oya send aza sharp sharp" as he will say. He gave me great advice and offered to change the engine of my 406 for free when the engine knocked and fix my car for free whenever it developed issues. I was looking forward to seeing him when next I come to Nigeria but hearing about his death was a big blow to me.
He was fearless and adventurous and a very good driver. He can drive and travel at anytime. I was once texting him and he told me he was driving and texting coming from Jos I think to lagos. I told him to be careful driving at such high speed and chatting on phone. I never knew accident would claim his life one day even though i learnt he didn't drive but had the accident when he took a public bus back to lagos after he delivered a vehicle out of lagos to a client. He fought for his life but later succumbed to his injuries sadly.
God knows best and it was a great honor and privilege to meet gazzuzz in person and i wish i spent more time with him. May God grant his family the strength to bear his demise. I will miss u 😢 I can't believe you're no more gazzuzz. Who will call me "DSS MAN" as you fondly call me. Rest on my friend 😢
Moving. His family is still here and would appreciate the extension of your gratitude to them, I think.
Technology Market › Re: Diy Lithium Ion Like-minds by Trippledots(m): 8:51am On Oct 01, 2024
