Who and who is live on pvoutput.org? Let's connect to it and show the world that solar energy is also flowing in Nigeria. There are only about 10 active users from Nigeria currently. I think I see @ojeysky on it?

Location?

mctfopt:


I've seen it fail under two years. Bad charging. Make sure yours are charged with the specified voltage and current.

A friend had 4 go bad in about a year. I don't know what happened. He was careful with charging. That shook my faith in Trojan, though I still have some old 6V trojans that I'm still rocking for about 6 years now.

Location?

Namzy:

Missing one number

My apologies

NiyiOmoIyunade:
Let me break form a little here but please do not take it personal. It is getting annoying to see people say this or that is incorrect with no hard data to back it up.

The issue I see here is one of perspective - some people have only used a fairly basic BMS that is not tightly integrated with their inverter system and it works and this is perfectly fine, but then they keep arguing the features and benefits of a system they have never used with another person who has daily access to to data from both the basic BMS systems which have no comms with the inverter as well as large commercial grade systems where BMS and inverter have communications and are tightly integrated together.

I expose the inner workings of an integrated system with data that can be independently proven or disproven but you do not argue with the data, rather just a blanket statement of this is incorrect based on how you run your own DIY system which is essentially for home use. I say yes voltage based control works but you get more features and benefits when the BMS and inverter/charger have comms but you say this is inaccurate yet provide no further info to back it up?

What we post on NL is for the benefit of a wide audience, my goal is to educate and inform and lay out possibilities and options and also learn new stuff - it would be really nice if you do not just say 'Oh this is inaccurate' rather what exactly is inaccurate? and then provide hard data to back up any claims with?

This way we can all learn from each other.

You have to ask yourself why is there a market for ICC and similar control and monitoring software to use with the Axpert type inverters? Why did the Axpert manufacturers start integrating additional hardware for comms with Lithium BMS into their inverters? why did Victron and Deye invest so heavily in the ability for their systems to have comms with various BMS? why did Schneider start rolling out systems capable of talking to the BMS when they were previously doing open loop voltage control in the past? Surely all these efforts across so many providers are not just based on idle speculation or to extract more money from the customers? No one is doubting that voltage control with no comms can work but I struggle when one argues against the facts yet has only limited experience with these complex systems.

May I respectfully say that this is also about perspective, not exactly a truism. There are several statements here that are incorrect from my perspectives . The so-called "integration" are more often about data for decision making whether by machines or humans. I have a DIY set up, but it will give many "industrial" setups a run for their money. I have all the data and the communications you get from any so-called integrated system. I know what each of my lithium battery cell is doing at anytime 24X7. I will like to know what you are able to know or do with your system that others can not do. Maybe you will make a convert of me.

Your suggestion that you are somehow experienced with more "complex systems" than anyone else is basically a brag. It is meaningless to me and presumably many others. Indeed, anytime you have to pull your "experience" to advance your argument, the chances are that you have moved into the region of what the oyinbos will call "bullshit". Otherwise, you will make your point and provide the evidence or advance some logic to support it, not "I know this more than you".

Let's continue to share knowledge here, not bragging right, superiority or "my setup is better than yours". Battery charging and discharging is inherently a very simple technology. It is like filling a bucket. What you can do is to work on how fast or slowly you want to fill the bucket and how full or empty you want the bucket to be. The rest is marketing.

IYGEAL:


You're using a 24V or 48V system?

48V nominal. Rarely goes below 52V on LFP even with the AC

mctfopt:
Genuinely out of curiosity, is anyone running ACs or AC off their renewable system? If yes, what is the minimum battery and PV they running it off and how has the performance being?

I run a single 1.5Hp LG AC on my system. The AC is located in my bedroom and it works in bursts of 1, 2 or 3 hours, maximum of 6 hours per night. I tend to do more of 4 hours than 6 hours. I have a total lithium power of about 600AH and I'm not shy of pushing it down to as low as 30%.

NiyiOmoIyunade:
No I sold 4 units out of my 20 Pylontechs and replaced with 32pcs 3.2v 280Ah Lishens.

The remaining 16 Pylon US2000s will continue to run off my 15kva Victron inverter while the Deye 8kw will be paired with the 48v 560Ah of Lishens.

I have contrived an arrangement where the 15kva Victron will transfer loads over to the 8kw Deye once the Pylontechs are at 40% SoC - this is essentially replacing my Generator autostart if I run loads aggressively (4 ACs late into the evening)

In the past heavy loads taking the battery to 35% SoC would trigger a Gen start for 1 hour, now instead of a Gen start it will trigger a load transfer to the Deye which will then run to 20% SoC before starting the Generator.

From 48kwh of Pylontech and 38kwh useable energy, I now have a combined 67kwh battery bank of which I can use 60kwh.

See attached pics when I took delivery of the cells and trying to figure out how best to arrange them.

Wow! 60KWh of useable battery power is a lot. It is about 3 times what I use daily.

NiyiOmoIyunade:
There is a bit more to Lithium charging than just voltage based control.

The Victron philosophy is to establish comms between battery and inverter/charger. This is mostly done via CAN bus in the Victron world but can also be done via RS485 or Serial - this comms allows a *Smart BMS* to act as system controller able to send control messages to the system's inverters/chargers who then become passive slaves.

When the inverter/charger can talk to the battery, you are able to access more energy and charge better and faster. In the Victron world, three control parameters dynamically obtained from a smart BMS are used to manage battery charging.

Charge Current Limit - CCL - for Pylontech, allows battery to request a max 0.5c and a min 0.2c charge rate at different SoCs

Discharge Current Limit - DCL - makes it so that you are forced to throttle loads as the SoC drops below 10% - you can no longer do 0.5c discharge rates past 10% SoC

Charge Voltage Limit - CVL - Dynamically adjusts to achieve 100% charge and also take care of cell imbalances so that no cell is overcharged even though there is massive imbalance in the cells - I have seen BMS elegantly limit CVL to 50v in a scenario where 2 cells out of 15 had issues - this was sustained for about a week until the balancers were able to bring the entire pack back into balance.

In a moderate to large system running off Lithium batteries, you really want to have a truly Smart BMS capable of comms - fixed voltage charging in a Lithium profile may not cut it and it is entirely possible to overcharge some cells or destroy your batteries even though overall system wide voltage limits are within spec.

In my case with Victron talking to Pylontech, the Pylontech BMS broadcasts a control parameter called charge current limit - CCL of 800amps when battery is low, this allows the inverter and MPPTs to run full throttle pushing in a combined 22kw (my installed hardware limit) of charge current until about 90% SoC when they throttle charging so the cells don't swell or heatup.

Further, because the batteries can report SoC, I am able to set precise Gen Start/Stop parameters and a host of others to achieve an optimal system.

This is why one would pay a premium for truly Lithium compatible equipment beyond just setting a Lithium charge voltage profile.

I honestly don't believe a word of these very technical and deliberately confusing points. And I'm not talking about what you wrote, but what the battery, BMS and charger manufacturers have clearly made you to believe. I continue to believe that most of these talks are basically to make you pay more for pre-existing technology given a new name. One thing I'm prepared to concede is that battery manufacturers may set stringent conditions for their batteries as a way of ensuring that warranty claims are not too burdensome. If a car can do 100Km/h, the manufacturers will be happy to limit you to 50Km/h knowing that the chances of damage is much lower at that speed. So, they may tell you not to charge at 1C or 0.5C or whatever tickles their fancies. With a good BMS, you can actually be a bit liberal with your lithium batteries. Your BMS should stand between your battery and any problem. The chances are that you will be seriously under-utilizing your batteries if you strictly follow manufacturers guidelines. Lithium can actually take as high as 1C charging current. That is why phone manufacturers are doing all sorts of high current charging, warp charging, flash charging, superspeed charging etc.

I also understand why installers may want to push premium and extra-protected system to clients. It reduces support calls and increases your business reputations. But, as a DIY guy, I have better ways to spend my money than buying bogus technologies that add little or nothing to my setup. I have used Victron "Lithium Profile" before and I see no advantage over my current setup with Outback and Felicity CCs and Inverters.

idsolar:
If na me I will trade-in this inverter to get another with verified lithium settings like sorotec, growatts etal so that u are sure of what you are using to eat your beta soup.

I don't know what else "lithium profile" on a charger mean other than setting bulk, absorption and float voltage to the same value and disable equalization. That is exactly what happens when I select "lithium profile" from victron charger. As to the fear of continuous float charges on the battery, the BMS usually does the remaining. When my lithium batteries enter "float" the current meters read zero.

So, if you have a perfectly good charger (inverter or Charge controller) on which you can modify the charging parameters, I don't see the need to waste extra money on any "lithium" profile, I honestly think it is a scam for manufacturers to make a little extra money on selling their inverters and chargers.

ojeysky:


Tasmota is a whole different firmware from the stock version so yes sonoff app will not work with it, have not used tuya or smart life so don't know if those will work.

Tasmota opens a world of possibility with these devices that one can only dream of with the proprietary firmware that came with them. But, it requires some efforts. I went to Tasmota because I wanted to have full local control. Tuya will first send your command to China before routing it back to your device and if there is no internet you may not be able to control your own switches. This was my initial experience, but I haven't touch Tuya or sonoff since 2018 so things might have changed in relation to local control.

Namzy:
please reply me

Oh hate oh Seven 14 hate two five 2

Namzy:

I have been sending you emails and you are not replying

I didn't get your mail. I got a nairaland notification and I responded.

Namzy:
Please does anyone use 120a felicity mppt here. I need to verify an issue? Thanks

I do!

GogetterMD:
That must have been a nasty fall that caused those cracks. Damaged that beauty

Like say "trailer jam am".

ojeysky:


I will like to know if this is actually correct since I started using Deye(5 months ago or so) I have done about 320KWh consumption on grid and 1.2MWh on battery and 2.1MWh solar generation. I will say grid is cheaper in that case except that I don't get useful grid all the time

Grid is always cheaper. We don't do solar to compete with the grid on cost, but on availability and reliability. Reliability is something you can not guarantee with grid.

House,

I need the Fangpusun BMV at a reasonable cost. Anyone with it can quote me with the price. Thanks

Barezzi:
No shading issues...
The South array is elevated with support and less than 10 degrees, while the West array is flat on my steep roof-I'd say 15 to 20 degrees.

I strongly believe this matter is spiritual!

Are they supplying the same battery pack?

If anyone has 280ah or 100ah lifepo4 batteries, kindly quote me. Thanks.

wolfenstein:

Funny enough it's still d same fool that would buy d phone 330k if I change d back glass myself for 15k and advertise it. So which is better?

Think it

Bros! If 15K will repair that phone, you will do it sharpally and make profit. We no stupid o.

Nigeria don suffer. Broken phone for almost 300k. Which kind fool go buy that one? Repair it or sell it cheap.

MontyNG:


Good choice. Based in Alausa, Lagos. Welcome to come check it out. DM

Can I pay 60K for the router?

We are you based? I want to make an offer for the router.

tetralogyfallot:
NO, am talking from experience bro, never connect 2 dissimilar batteries together either parallel or series.

I disagree. In series, No. In parallel, possible. Depends on how dissimilar. In this case, the answer is yes, you can. Flooded batteries are particularly very tolerant. All you may need to do is to keep an eye on the water levels.

edryz:
In absence of a distilled water, can one top a tubular battery with available water at home?

Let me narrate an anecdotal story. I bought Trojan flooded batteries about 7 or 8 years ago. I was topping it up with water from my borehole. Of the eight batteries (6V), 7 are still doing fine, i.e. I'm still running them beside my lithium bank. Because of the impressive performance of my Trojan batteries, a friend bought another set of 4 trojan batteries (12V). He was diligently topping them up with packaged distilled water. His batteries didn't last a year before he sold them off as scraps.

I went to his house one day and I saw his left over distilled water in 4 liter kegs. I brought them home to use with my batteries. But, I became fearful. If my borehole water was okay for my batteries and his own died while consuming distilled water, will it be wise to feed my batteries with the same distilled water?

Short story; the distilled water is still in the kegs, unused and my batteries have continued to drink borehole water. Never used distilled water on them for one day!

emaminaj:
Available

How can it get to Ibadan with pay on delivery. Can pay a small fee for transportation.

Valto:
for those going for cheap unknown batteries

Wow! Ultimate Scam!

mctfopt:



That dude you mentioned is a low-key scam artist. He knows how to take pictures of TVs to make it look inviting while the real deal is so bad you wonder if it's a different tv. Same dude sold TV to a guy I know and it arrived without remote. TV that was touted to be super flat screen appear like the energy guzzler LCD TVs of the early 2000's era. It was supposed to come with remote and he surprisingly "forgot" to add it. Quality of the TV is just poor. At best the owner had to go to a local dealership and got himself a tv. Ended up sending the scrap he sold as 2019 TV to the village. Did I mention that this same fraud waybilled this tv and somehow "forgot" to pay for it even though he has collected the waybill fee?

These days I won't advise anyone to buy tv from that dude or even try any "fairly" used tv as there is no fair deal with em. As usual he'll only read this review and disappear back to his thread without saying jack.

I had a similar experience with the guy and I even opened a thread about his scam. Once in a while, I see new "likes and shares" on my old thread and smile to myself knowing that another "mugu" has entered his trap.

He has many accounts on nairaland to upvote himself and attack those who complain about his scams. I believe that is why he has survived so far. For me, he sold a 55" LG to me for 170K some years back. He brought the TV down himself protectively packed like a dead body. When we set the TV up, it had several thick and unsightly lines which were not in the picture he showed to me while we were negotiating. He pretended that the line got there as a result of movement during transportation which I knew was a lie having personally transported TV almost unprotected on the back seat of my car from Alaba to Ibadan at least twice with no damage.

I smell strong attempt at blackmail. It looks like this fight will be a draw as Madam Oby will probably just quietly let the issue slide. Omojuwa is clearly threatening to fight very dirty.

justcallmenuel:

You’ve always been a complainant right from the first time you chatted me up for 1.5kva 24v Schneider inverter (08-01-20), I should’ve listened to my instinct and not do business with you. If you think you can destroy the good name I’ve built for years on this forum, you lie bro. Stay safe and enjoy your Sunday

This is the equivalent of admitting guilt. There is nothing wrong with being a "complainant" or in other words being very careful in ensuring that the little money you have is giving you the maximum possible. Forget the complainant stuff and address the AC and the cable issue. I have done business with you before and I belief that you are one of the good ones. So, explain this with automatic alacrity to retain my, and others' confidence.

ojeysky:


Sorry about this experience, for me it's DIY all the way, I see the cells and other components with my korokoro eyes and they see me and behave . Imagine a battery company asking for contacts of my customers! He must be smoking something niyen

We just heard one side of the story. Are there other Weco users here with similar problem?