₦airaland Forum

Redman44:
I love him. He knows his real country, not the country of his birth. I have nothing against the UK, but blacks are not originally British. And many of them in the UK are slowly realizing that : .

easyyoke:
Make una epp me abeg, my ogas

Overpaneling is the practice of putting more panels on one charge controller than it's rated for in terms of wattage. When overpaneled the maximum voltage should NEVER be exceeded under any environmental conditions (light and temperature, primarily), but the maximum wattage can be. So your unit has a maximum charger capacity of 4000W. If you put 5000W of panels on it, but they could never exceed the maximum voltage, then it would be considered overpaneled.

First:
There is no guarantee that the MPPT controller in the inverter will be fine with over paneling. Growatt does not provide documentation or advice regarding this practice, but they do not specifically forbid it in their manuals. You are on your own, and while I haven't heard of anyone having warranty issues with over-paneled Growatt inverters, I suppose they could deny coverage for that reason.

Second:
Many, many, many people and companies overpanel Growatt MPPT controllers. Whether it's because they live in a sun-poor area, or have to mount their panels at suboptimal angles, or they just want to use the inverter at its maximum power all the time, it's a very common and generally safe practice.

Third:
The MPPT algorithm starts at the unloaded voltage with 0A of current. It starts to draw current, which due to the way solar panels work, will naturally cause the voltage to drop. It will increase the current in steps until it finds the maximum power point OR it reaches its own internal maximum power limit. So a 4000W charge controller that's overpaneled to 5000W with 5000W of solar power actual available (cold, sunny day) will stop increasing its current draw once it reaches 4000W of power. If the solar panels increase their power, it will reduce the current, if they reduce in power it will continue to adjust the current until the MPP is found. It continues to adjust the current draw throughout operation to maximum power input and keep under its own power capacity limits.

So, in general, the MPPT algorithm protects the charge controller from damage due to overpaneling. However...

Four:
From an electrical engineering standpoint there is likely to be a limit due to the algorithm itself, and the components chosen for the circuitry. A 4000W charge controller with an operating range of 120A to 250A would expect no more than 35A at the lowest operating voltage and the highest power input, and perhaps they only have a 10% margin so they choose a 40A transistor. The algorithm starts by turning the transistor on, and if a customer decided to overpanel significantly it might instead see 120A. Because they chose a slower processor and can't detect the fault fast enough the transistor, coil, capacitors, and other parts may fail.

They don't tell us what their margin is, or give us any maximum solar input current. Growatt gives a "Maximum solar charge current" but that, non-intuitively, relates to the maximum current it will supply to the battery at the battery voltage (48V), not the current it can accept from the solar array. It's used to help size the batteries (if your batteries can't accept this much current it can damage them).

I believe they know and accept that since you can't perfectly match solar panels to charge controllers then many installations will be slightly over paneled, particularly since most of the time the solar panels will not be pushing their maximum current. Further, other parts of the circuity will prevent or delay high instantaneous currents, and other parts of the circuitry can protect the overall charge controller from this sort of situation. So there is a margin, and the margin is significant.

Five:
Using your charge controller at its maximum ratings wears it down more quickly than using it at a lower power output. If you always run 4000W through the 4000W solar charge controller, it simply won't last as long as one run at 50% of its capacity most of the time, and at capacity only 5% of its time - which is typical for solar equipment. Further, it can handle faults better when it's at a reduced capacity than when it's running at full capacity.

Summary:
Overpaneling
- generally works and is safe as long as the other requirements are met.
- is generally not guaranteed to work by manufacturers beyond small amounts due to typical system sizing mismatches
- will reduce the lifetime of the charge controller
- will probably make the charge controller more susceptible to small faults

HeavenlyBang:
900k now per my last inquiry a few weeks ago.

Techsinnovative:
Yes totally agree Mr Reeds the better. However, when budget is limited one has to be realistic about ones wish list. At 800+ am already over my set budget.

With 25.6v 280ah cells likely rating is 7168wh, at 80% DOD its about 5734.4wh available which is still great. 6000 cycles promises about 20 years, at 5years am happy with a depreciation cost of about N550/day(thats not bad at all for stable energy in nigeria today.)

Am repurposing the quanta batteries to power low power devices so not getting rid of them just yet.

Thanks a lot appreciated.

Techsinnovative:
Thank you so much for pointing this out as it really solved my confusion and put my thoughts in order.

Am coming from a place of having to consider replacing 2 quanta 200ah batteries at almost 1million which to me was ridiculous even though they were durable, 3kw would the max borderline one could squeeze out. Now compare that to 8kw Haisic at much lesser price point way more power!

Abeg where I fit get this!

Thanks 🙏

Leilalee:
I'm really curious tho how should they market their products then, cus you're making it sound like it's wrong or something, if there's a way you think they should advertise pls do share. This is coming from genuine curiosity no hard feelings

TUANKU:
This is a nice marketing post for Realme phones OP.

Ilamina:
Every girls should be curvy like southern African girls

They make east African girls look like they don't exist

Are you a p.i.m.p.?

You seem to always have a thread where you are recommending one country after the other when it comes to women.... and to think you are supposedly a female

Kalulu44:
I guess you didn't read well, most of those women came with kid or kids from another men and he Abiola knew about it before taking them in

bkuranga:
Thank you.
Thought it will be an easy set up guide.

bkuranga:
How do I use Home Assistenat with Junctek Shunt, please?

Mrreed:
25. 6v 150ah (EVE cells)
With 100a BMS, 570K
With 200a BMS 580K

Techsinnovative:
@ Dam5reey1 and other Gurus in the house, please i seek advice.

i need to replace my quanta batteries on a 4kw/24v hybrid inverter, am looking of getting a Lithium battery pack. However i have a strained budget of #600k. i need a minimum of 3.5kwh, would have wished for a 5kwh. I also need wifi capability for the battery as i plan on integrating it to Home Assistant.

- Can you please suggest what i can get in this budget range?
- Would i be able to achieve 5kwh if i assemble it myself (am comfortable with electronics), even if i have to add a little bit more to achieve?

Thank you for the tremendous knowledge you share

Ishilove:
I think they were quoting him verbatim, that's why. I too frown at such perpetuation of the stereotype that Africa is a country. It is disgusting and reeks of inferiority complex.

ogododo:

Edikan said, “Akama means ‘big’ in African, and it also comes from an old Indian language meaning ‘virtuous’, so it kind of sums it up.

https://punchng.com/nigerian-behind-houstons-vip-car-service-busted-for-multimillion-dollar-scam/

KudozInteriors:
Good day Solar Gurus

I hope you still remember me and the wahala I had after being defrauded and given a 2.5Kwh Sako lithium battery instead of a 5Kwh battery which I paid for.

GOOD NEWS: I’ve gotten my brand new 5Kwh battery.

Sako CEO got involved in the matter and promised me a new battery once their container comes back. She fulfilled her promise and I collected the battery yesterday. I must say that the customer service I received from Sako was premium and top notch.

The agent who defrauded me still tried every possible means to stop the company from giving me the battery. It was full blown war. He cooked up many lies and stories and tried to make the company believe that I and my technician are the fraud but the company looked through the whole smoke and saw the truth and gave me what I paid for. SAKO has won my heart shaa and I’ll advice anybody buying from them to go directly to the company. I have their direct link if anybody needs that though.

I want to specially thank everyone here who took their time and wealth of wisdom and experience to advise me on how to go about the stuff. Your advises paid off and I don't take it for granted. Thank you sooooooo much and God bless you all. May people that matter rise up and help you when you need them.

I also want to specially thank @Androblaze and @Dam5reey for the roles they played.
@Androblaze took it upon himself to help me. We chatted and talked for long on WhatsApp on the way forward. He was always reaching out to know how far and to advise on the way forward. What a man! This issue taught me a lot and also made me believe more in humanity again. I stopped posting here since as I was advised to stop as my enemy might be reading my strategies from here too. @Androblaze, my brother, thank you sooo much and God bless you and raise people to help you when you need them.

Below is the picture of the new battery. It is way heavier and bigger than the first one.

Sincerely, I thank God that I met this beautiful community of people willing to help each other achieve Solar energy independence. I've learnt a lot here and I keep learning. THANK YOU PLENTY!

GOD BLESS YOU ALL.
GOD BLESS SAKO.😊

JUSTICE WON!!! 💪😃😃🎉

omotoda:
Charging will be a major issue.At 0.5c that's over 300amp required .That's massive.

olujosh301:
$100 MB56 628Ah(3.2v)EVE lifepo4 cell
This would be good for big setups


https://www.youtube.com/watch?v=ngI9_UE7Yf4?si=DkgJev12Zu7B4DIn

allstarfestus:
Okonjo was also a finance minister , so this is not complete ... Complete it

FreeIgboho:
I think Putin is using this ICC warrant as excuse to rest

Kutunban:
Here it is, your sight has to be great to get picture one. Why do I have to post at least 40 character?

Seun:
We have fixed most of the issues with the bot and the minimum character count.

Procashtips:
₦12m for a 19 years old car?

Nigerians we hail thee. .

Wickedlywicked:
Yes, you are very right and same applies to many Nigerian politicians and almost none of them is saint. How did Arthur Eze make his billions and what about the Obi who is being whitewashed as the most upright politician today? Dude was feeding fat under the administration of that very same devil that truncated our democracy while others were fighting.

erniok:
The key phrase is :They said that he used his personal account to communicate official issues.

When Trump stops doing this, he can block anyone he likes same for any government official.