NewStats: 3,262,097 , 8,176,062 topics. Date: Saturday, 31 May 2025 at 07:02 PM 2g6p6i

Due to my needs, I have added two other packs to the @ 5kwh pack to a total of @15kwh. Though I don't monitor daily or that frequently for that matter, I have not seen any unexpected behavior outside what is expected , based on the way I use them.
Nothing lasts forever, but one thing I never wish for is to go back to Lead acids. In Yoruba , it is called APADASIBURU (return to evil). If newer technology comes, I am very open. When I see videos of people lugging tubular batteries up and down, I tend to pity them and wonder why some people are still riding bicycles uphill when the direction to their destination is downhill.
If you have Lead acids now, by all means use them but please please my brother, there is absolutely nothing to gain by buying Lead acids in 2024.
I have used Sagem 4 sim phones before. Wonderful phone for 2005 but not for 2025. I hope you get my point.

kristien4:
Okay, any drop in the lithium performance?.. i was thinking of upgrading to lithium soon. All the hype about lithium. Even mobile phones that use lithium battery, over the years the battery does depreciate. Phone wey dey last one full day after purchase, 6months later, e no go reach again..

mctfopt:


Just providing you the companies you can use to ship things down from there...you don't really have to buy a single Growatt from US to ship down here. It may not be the most cost effective things to do.

My inverter was actually included in a big purchase from Signature solar and their warranty covers it.

It won't be cheaper to just source Chinese product from the US unless there's a deal to be had.

Sometimes I do buy things like phone, power tools,etc from the US, I use heroshe to ship it down or have a friend bring it down when they visit Nigeria, which is often.

I see. How feasible is travelling with a Growatt inverter from US to Nigeria? 🤣🤣.

Just kidding here. It makes more sense to me now that your friends bring stuff from US to Nigeria. I thought they were shipping it to you directly, which is something I was looking forward to do. But like you said, shipping a single thing isn't viable.

I have bought some EG4 batteries and Solar s from Signature Solar in the past. Pretty good deal.

mctfopt:


Just providing you the companies you can use to ship things down from there...you don't really have to buy a single Growatt from US to ship down here. It may not be the most cost effective things to do.

My inverter was actually included in a big purchase from Signature solar and their warranty covers it.

It won't be cheaper to just source Chinese product from the US unless there's a deal to be had.

Sometimes I do buy things like phone, power tools,etc from the US, I use heroshe to ship it down or have a friend bring it down when they visit Nigeria, which is often.

Also, it's kinda cheap to ship from China to US if you know the right people. Only thing is that it might take time to get to you. For example, I have bought a couple 280AH, 304AH EVE cells from China for my own DIY battery. I bought JK BMS as well for a 48V 14kw / 15kw battery set up. Signature solar sells their EG4 PowerPro for around $3700-$4000 minus shipping and sales tax. Importing battery cells from China cost me around $2000 for the entire setup + shipping.

American companies buy things from China and increase the price by 3 folds. Importing from China can be a viable option. I wanted to build my own battery packs using Apexium DIY kit and ship them to Nigeria. The shipping would be outrageous and might not make sense. Shipping from China to US isn't that bad.

So I guess my family in Nigeria can't have nice things 🤣

kristien4:
My jinko 580w watts making me proud.
Rated 13.6amp at STC producing 13amps..

A string or 2 strings of s connected in series n parallel?

Original Jinko solar s.
Authorize dealer.
Delivery available nationwide.
Pay on delivery, LAGOS ONLY.

475WATTS JINKO SOLAR S-140,000
550WATTS JINKO SOLAR S-155,000
555 WATTS JINKO SOLAR S-160,000
580WATTS JINKO SOLAR S-175,000
625WATTS JINKO SOLAR S-185,000

Davion:


Hello Bro, I am trying to get in touch with you about your experience with the 16kw Deye inverter. Saw your post a while back on your not-so-good experience. I specifically need to buy a 16kw Deye and I am hoping to learn from your mistakes and hopefully buy a proper single 16kw, as that is exactly what I want. I don't want to parallel two 8kw. Is it possible to have your email for private communication?

You can me on:
0 8 0 3 3 2 5 2 1 8 4

kristien4:
i was getting 3900watts. I have 8pieces of 580w jinko . Thats 487watts per .

What's the size of your battery bank?

kristien4:
i was getting 3900watts. I have 8pieces of 580w jinko . Thats 487watts per .

You were loosing 16% of the power. That falls between STC and NOTC of the . Your harvest is good, some s would not even do up to NOTC.

This is why you should factor in such energy loses in your build. Some people might see this as oversizing but it's not.

durodee:
Due to my needs, I have added two other packs to the @ 5kwh pack to a total of @15kwh. Though I don't monitor daily or that frequently for that matter, I have not seen any unexpected behavior outside what is expected , based on the way I use them.
Nothing lasts forever, but one thing I never wish for is to go back to Lead acids. In Yoruba , it is called APADASIBURU (return to evil). If newer technology comes, I am very open. When I see videos of people lugging tubular batteries up and down, I tend to pity them and wonder why some people are still riding bicycles uphill when the direction to their destination is downhill.
If you have Lead acids now, by all means use them but please please my brother, there is absolutely nothing to gain by buying Lead acids in 2024.
I have used Sagem 4 sim phones before. Wonderful phone for 2005 but not for 2025. I hope you get my point.

Well said

SAKO 550W Solar
5KWH New Cells
5KWH Grade B Cells
5.5KVA Hybrid Inverters
08033213577

durodee:
Due to my needs, I have added two other packs to the @ 5kwh pack to a total of @15kwh. Though I don't monitor daily or that frequently for that matter, I have not seen any unexpected behavior outside what is expected , based on the way I use them.
Nothing lasts forever, but one thing I never wish for is to go back to Lead acids. In Yoruba , it is called APADASIBURU (return to evil). If newer technology comes, I am very open. When I see videos of people lugging tubular batteries up and down, I tend to pity them and wonder why some people are still riding bicycles uphill when the direction to their destination is downhill.
If you have Lead acids now, by all means use them but please please my brother, there is absolutely nothing to gain by buying Lead acids in 2024.
I have used Sagem 4 sim phones before. Wonderful phone for 2005 but not for 2025. I hope you get my point.

Wow... very apt. Thanks

TechGeek777:


What's the size of your battery bank?

4pieces 200ah AGM batteries...

Is 8pieces of 580w too much for 4pieces 200ah battery??

kristien4:
4pieces 200ah AGM batteries...

Okay

kristien4:
Is 8pieces of 580w too much for 4pieces 200ah battery??

You may have to state the C Rating for your battery by looking at what's written on the body

TechGeek777:


You may have to state the C Rating for your battery by looking at what's written on the body

[quote author=kristien4 post=130159158][/quote]

Your battery is rated C10(i.e, you shouldn't discharge the battery in less than 10hrs)

200Ah/10 = 20Ah discharge current * norminal voltage(48v) ==> 960w(Don't discharge more than this at any given time).

80A is your Max Charging Current
80A * 48v = 3840w (Don't charge more than this)

Submission: Based on your Pv production of 3900w, your charging Wattage is good.

DON'T discharge more than 960w if you want your battery to see 3-5yrs!

TechGeek777:


Your battery is rated C10(i.e, you shouldn't discharge the battery in less than 10hrs)

200Ah/10 = 20Ah discharge current * norminal voltage(48v) ==> 960w(Don't discharge more than this at any given time).

80A is your Max Charging Current
80A * 48v = 3840w (Don't charge more than this)

Submission: Based on your Pv production of 3900w, your charging Wattage is good.

DON'T discharge more than 960w if you want your battery to see 3-5yrs!

Thanks boss. I appreciate the info. I wanted to ask, if i add 4 more batteries to make it 8pieces. That's 4s2p(400ah), can i increase the charging current too?

Nahum777:
.


So I guess my family in Nigeria can't have nice things 🤣

You can always buy from China and ship it direct to them. Sea shipping rate is not bad, just takes more time with ETA between 45 to 90 days.

Nexuspulse:
SAKO 550W Solar
5KWH New Cells
5KWH Grade B Cells
5.5KVA Hybrid Inverters
08033213577

Please are the new cells grade A? How can one tell the other other is grade B?

mctfopt:


Please are the new cells grade A? How can one tell the other other is grade B?

New Cells are grade A 6000 Cycles Series. 5 years warranty 6000 Times cycle base on 0.25C at 25°，DOD 80%, with communication protocol, warranty 5 years,life time more than 10 years Communicate procotal with following inverter brand name :Growatt,Voltronic, DEYE, GOODWE, VICTRON, PYLONTEC, SMA, SOFAR and so on, IP20, while new cells grade B is 4000 cycles base on 0.2C at 25°, 3 year warranty, use life over 5 years. Communicate procotal with following inverter brand name :Growatt,Voltronic, DEYE, GOODWE, VICTRON, PYLONTEC, SMA, SOFAR and so on

5120WH New Grade A Cells NGN 1,258,613
5120WH New Grade B Cells NGN 1,113,425

Nationwide Delivery

What could be responsible for an inverter reading 0 watts when the sun in early morning sun. I noticed these fluctuations yesterday. It moves from 1.5kw to 500 and even to 100w and less. What could be the problem?

Sapiosexuality:
What could be responsible for an inverter reading 0 watts when the sun in early morning sun. I noticed these fluctuations yesterday. It moves from 1.5kw to 500 and even to 100w and less. What could be the problem?

Voltage may be below operating range?

HeavenlyBang:


Voltage may be below operating range?

This is the voltage and the charging has started and it just increased. Is there anything I can do to control or regulate it of make it operate fine?

Edit: I think I need time to understand this. I think I see it better now.

Sapiosexuality:
This is the voltage and the charging has started and it just increased. Is there anything I can do to control or regulate it of make it operate fine?

Edit: I think I need time to understand this. I think I see it better now.

None of those pictures show PV input voltage.

First is AC output, second is battery voltage. It probably wasn't charging earlier because PV input voltage wasn't high enough.

Nexuspulse:

New Cells are grade A 6000 Cycles Series. 5 years warranty 6000 Times cycle base on 0.25C at 25°，DOD 80%, with communication protocol, warranty 5 years,life time more than 10 years Communicate procotal with following inverter brand name :Growatt,Voltronic, DEYE, GOODWE, VICTRON, PYLONTEC, SMA, SOFAR and so on, IP20, while new cells grade B is 4000 cycles base on 0.2C at 25°, 3 year warranty, use life over 5 years. Communicate procotal with following inverter brand name :Growatt,Voltronic, DEYE, GOODWE, VICTRON, PYLONTEC, SMA, SOFAR and so on

5120WH New Grade A Cells NGN 1,258,613
5120WH New Grade B Cells NGN 1,113,425

Nationwide Delivery

Interesting to see brand come out and tell us the truth about grades and pricing.. some will just Hide under grade B and claim they are selling cheaper per KWH cause based on these you won't even notice any difference for first year!

mctfopt:


You can always buy from China and ship it direct to them. Sea shipping rate is not bad, just takes more time with ETA between 45 to 90 days.

Your responses have been helpful. What about custom fees and the like? I heard that's a huge problem. If I send $6k worth of Lithium Batteries, the custom dues would be crazy.

TechGeek777:


Your battery is rated C10(i.e, you shouldn't discharge the battery in less than 10hrs)

200Ah/10 = 20Ah discharge current * norminal voltage(48v) ==> 960w(Don't discharge more than this at any given time).

80A is your Max Charging Current
80A * 48v = 3840w (Don't charge more than this)

Submission: Based on your Pv production of 3900w, your charging Wattage is good.

DON'T discharge more than 960w if you want your battery to see 3-5yrs!

Just a Note sir, C-rate is for both Charging and Discharge..

C10 is 20A operating Current for both. Not just for discharge.

Even if you charge at that 80A, the Battery voltage will rise quickly and the Charging current will start to reduce..

This will also result to inefficiency cause when sun is blasting his s won't be able to push available energy into the battery.

That's why some systems don't last, they are boiling the battery thinking 80A is okay since it's written on it.

At 50 DOD, meaning you only need to push 100AH into the battery, it's best to charge at 20A as per C rate, so in 6-8hours your batteries should float.

kristien4:
Thanks boss. I appreciate the info. I wanted to ask, if i add 4 more batteries to make it 8pieces. That's 4s2p(400ah), can i increase the charging current too?

If you are using Hybrid it will make sense to set max charging current to 20A for 4s and 40A for 4s2p.. anything higher is over charging and will kill the AGM faster.

Why not save for Lithium! Where you can do up to 0.5C charging. That's 100A on a 48V 200Ah

Nahum777:
Your responses have been helpful. What about custom fees and the like? I heard that's a huge problem. If I send $6k worth of Lithium Batteries, the custom dues would be crazy.

Never paid ₦1 as custom duty for all the sea shipping I've done so far. Must've been factored into the shipping cost.

HeavenlyBang:


None of those pictures show PV input voltage.

First is AC output, second is battery voltage. It probably wasn't charging earlier because PV input voltage wasn't high enough.

Yeah. That was it.