clevermugu:
Telling someone to shut up in a conversation is not ideal.. according to the pictures, did u actually sold him a pack coupled with those old overused and mismatched cells?

did u couple a small LFP pack (mtn lumos) with a 3.7V li-ion bms?

brightk:
Make i even assume say na me de lie 4 d gp n u re d truth master.

Does dose cells look like a 6 month old cell? As a professor in battery chemistry. How do u explain such battery configuratuons u just made up there? How do u explain to this group thst u built a battery pack with mismatched cells ameh99. Dat ur bsttery pack arrived its destination n refused to turn on despite having chsrging voltage across d terminals. Thst i had to start buying tools just to retighten terminals just becos d cells were moving from one end of the casing to the other. The flexible wire u used as busbars cut off from the terminals because of the movement of d cells. Abi u don forget where u still ask me 2 go n buy spanner n insulate dem just to tighten the nuts on the terminals.

Lastly be bold enough to tell this group how mych you sold the so called 24v 200ah pack to me.

clevermugu:
do u really believe he used such costly Bluetooth bms on a cheap mtn LFP lumos pack?

Valto:
if your inverter mppt is the high pv type, then u should series all. if not 2s3p is the best.

clevermugu:


according to his previous posts he mentioned another small LFP mtn lumos pack, which is likely the one he meant.

Valto:
then u must series all.

FEGEITOK:
I have two solar arrays and two charge controllers and two inverters.

I now have a third inverter.

My question is can one solar array/charge controller be connected to more than one set of batteries (ie., batteries hooked up to different inverters) concurrently?

Trying to skimp on setting up a third solar array and purchase of a third charge controller for now.

abbeymighty:
Hello house, please i need advice, i have 4pcs of 300w panels, with 3kva hybrid inverter and 40ah mppt CC, i decided to to connect two panels to inverter and two panel to CC, on the same 24v bat3. Will it work, the inverter max over watt us 600w and 75v voc while CC is 1400watt and 150v voc
Please advice

sharks776:
Hello

This is my current setup
Jinko 560w x8
Sunshine solar 430w x6
Sunshine solar 450w x6

3 CCs, one for each
1 inverter 7.5kv Felicity transformer base

2 Wakatek lithium batteries 12.5kwh (LB48250)

Everything is connected to 2 busbars (+&-)

Question:
I want to add at least one more battery but currently the distributor is out of stock.
What will be the effect if I add another brand of lithium battery possibly of different capacity? If that is even possible

Justice629:
@bassdow
I gbadu your inputs here well well but as I no be keyboard warrior I say make I maintain for corner the look many of them do called solar pros here.
Little piece of advice- when you ready to go lithium no make mistake of buying from naija vendors because must times na worst grade cells them dey buy from China, my own experience still the pepper me for body now.

bassdow:


Would appreciate if you tell us how you arrived at this. that way, next time, he/She would have little reason asking such question.

As for me, so long chargeController max rating exceeds total Voc of panel, I just series everything.
That has added advantage of cooler cables

ZIKEYBOY11:
Hello house, I need advice on this setup.

I have a 5kva 48v Felicity hybrid inverter.
8 X 300W Solar panel.
4 X 12v 220ah battery.

According to the inverter specs, the PV input voltage range is 90V - 550V. While the Maximum input current is 15A.

My question is this, in what arrangements should the solar panels be ? All in series, or 4 series and 2 parallel? Or 2 series and 4 parallel?

Also, whoever has used Felicity hybrid inverters, please confirm what type of in-built charge controllers they have ?

Thank.

kristien4:
its written @c20 rating. Then recommended maximum charging is 10% of battery capacity. I was thinking since its four battery connected in series 40amps should be okay... but i noticed a low bubbling sound while charging the 4 batteries(tubular)at 40amps current. Is it normal?

casualobserver:


This is the problem I have with tubular batteries. The problem is that when charging a flooded lead acid battery, you are supposed to temperature compensate. For instance you are supposed to reduce the charging voltage by .005v for every cell for every 1 degree increase in temperature above 25degrees. If you have a 48v system that is 4 batteries x 6 cells per battery I.e .005 x 4 x 6 or .12v per degree above 25.

Tubular batteries should not be indoors but even indoors the temperature could easily be 30c. If they are placed outside the temperature could easily be 39c and often 35c. At 35 degrees you are sending a charge voltage to your batteries that is 1.2 v above what it should be. That’s what you call overcharging and this degrades and kills lead batteries. That is what leads to the bubbling sound you are hearing. You are effectively equalizing your batteries all the time….and giving off gases. Bubbling should only happen during equalization. Equalization should only be done once a month a or once every 3 months.

The problem is that most of the hybrid inverters on the market do not have BTS for temperature compensation. The only one I have seen is Deye and we all know deyes are expensive. The only way to properly charge your lead batteries is to use MPPT charge controllers as they tend to come with battery temperature sensors. The problem with charge controllers is that you are constantly pulling power from the batteries not directly from the panels with a hybrid. I would rather power directly from the panels and draw from batteries only when solar power is not enough or at night than constantly drawing power from and working the battery with a charge controller.

This is the dilemma I am trying to solve myself before I pull the trigger. If I go lithium I don’t want to get any of these cheap lithium batteries like Felicity (1st hand reviews/ opinions are hard to find and the few about are spotty at best) and I don’t want to spend 1.5-6m on 8 tubular batteries that may not last because they are constantly being overcharged.

I t will be interesting to hear from the experts how they account for temperature compensation when they 8nstall tubular batteries.

shogbenga:


Thanks @mctfopt

The total load is 4.45kw, less a/c and heater

kristien4:
its written @c20 rating. Then recommended maximum charging is 10% of battery capacity. I was thinking since its four battery connected in series 40amps should be okay... but i noticed a low bubbling sound while charging the 4 batteries(tubular)at 40amps current. Is it normal?

brightk:
i beg to disagree on the part of drawing current from batteries. When ur pv surpasses ur current load it would power ur serup without touching ur batteries if in excess ur batteries will charge

Justice629:
@bassdow
I gbadu your inputs here well well but as I no be keyboard warrior I say make I maintain for corner the look many of them do called solar pros here.
Little piece of advice- when you ready to go lithium no make mistake of buying from naija vendors because must times na worst grade cells them dey buy from China, my own experience still the pepper me for body now.

earthrealm:


you have all this on just 8 pieces of 12v 200ah battery?.. omo u get mind...those batteries will die/get weak within 1yr, seems you are not knowledgable and fell into the hands of kazeems installers. like the one I saw on Instagram, a so called experienced installer with over 400 followers, hooked up a 1.5hp sumo on 2units 12v 200ah battery and 24v 5kw inverter...and was bragging, on how rugged the inverter is ..... an less than 2 months I give such a setup, b4 the battery go die. lead acid battery is not designed to carry such humongous load.

back to your question your 8 batteries if in good health can only carry a max of 1.6kw, so you need to ensure your panels would bring in the balance of 3kw....and also because of the varying weather/suns intensity..you may need up to 6kw panels to ensure you are sure of producing average of 3kw all the time......then the wahala of this design is that you may also exceed your battery acceptable charging current, likely 20 or 30amps.......unless its special agm that you can do 60amps.

lastly for you or anybody running or planning to run such a huge load... best you for lithium battery...or 2nd best option, these 2v 1000amp or higher battery

Valto:
sorry for your bad experience, but wrong assumption bro. people still use brand new grade A cells to couple, i order cells from reputable Chinese suppliers (docan,shenzhen starmax, shenzhen xuba and shenzhen new deriy) most of my cells have capacity test performed on them, and they are all above capacity with very high cycles and authentic QR code. i use the best Bluetooth bms, pure copper battery terminals, thick copper 10mm, 16mm,25mm,35mm wires depending on battery capacity.
Premium lithium battery packs are pricey, but better soup na money kill am!
Never will u open up my pack and see low grade crap cells

Justice629:
@bassdow
I gbadu your inputs here well well but as I no be keyboard warrior I say make I maintain for corner the look many of them do called solar pros here.
Little piece of advice- when you ready to go lithium no make mistake of buying from naija vendors because must times na worst grade cells them dey buy from China, my own experience still the pepper me for body now.

Justice629:
@bassdow
I gbadu your inputs here well well but as I no be keyboard warrior I say make I maintain for corner the look many of them do called solar pros here.
Little piece of advice- when you ready to go lithium no make mistake of buying from naija vendors because must times na worst grade cells them dey buy from China, my own experience still the pepper me for body now.

casualobserver:


You clearly did not understand what I said. What I said is that I prefer a hybrid so it powers the load 1st and then charges the batteries with the excess and only draws from the battery when the solar power is less than the load or at night which is what you have described above. What I said is that if I decide to use a SCC to charge the batteries in order to allow for Temperature compensation either in addition to a hybrid or in conjunction with an inverter charger, you are drawing power directly from the batteries or wasting solar power.

It’s not a very efficient way of doing things because it means having to dedicate a set of solar panels for daytime consumption via the hybrid and another set for the SCC to ensure temperature compensated charge of the batteries. In addition you can’t totally stop charging by the hybrid so even if you limit the current to the minimum it will still send a higher than appropriate charge voltage to the battery. One might as well stump up the money for a Deye with BTS or get lithium. In any event should their be a need to charge the batteries via the hybrid either on cloudy days or at night we are still back to the original problem that all these hybrids on the market Growatt, axpert, felicity etc do not do temperature compensated lead acid charging and will degrade batteries in the long (maybe even short) run.

dollarnaira:


You get time to they explain o.
There are fake and original humans.
Those who buy from you will understand.

brightk:
valto battery de handle loads wella. One de site de work him arse out

Valto:
if your inverter mppt is the high pv type, then u should series all. if not 2s3p is the best.

brightk:


Make i chuk mouth 4 dis installation . Panels are 380w* 6 exulted eagle with Voc 67v and Isc 7a. Load is abt 900w to 1kw contnious. Batteries na lithium 24v 173ah. We plan to add extra 6.

With all d six panels battery turns out @ predefined cut off of 24.5v. At abt 5 to 6pm in the evening.

The problem now is mppt input current max is 15A. Going by 7*2*1.25(safety factor). Dat is 17.5A. Me n u kno say we nor go see 7A.

Me i was suggesting 6s2p. Another suggestion was 2 use a seperate cc n parallel d incoming six panels 2 charge up the battery.Was ur take oga

Valto:
sorry for your bad experience, but wrong assumption bro. people still use brand new grade A cells to couple, i order cells from reputable Chinese suppliers (docan,shenzhen starmax, shenzhen xuba and shenzhen new deriy) most of my cells have capacity test performed on them, and they are all above capacity with very high cycles and authentic QR code. i use the best Bluetooth bms, pure copper battery terminals, thick copper 10mm, 16mm,25mm,35mm wires depending on battery capacity.
Premium lithium battery packs are pricey, but better soup na money kill am!
Never will u open up my pack and see low grade crap cells

Valto:
sorry for your bad experience, but wrong assumption bro. people still use brand new grade A cells to couple, i order cells from reputable Chinese suppliers (docan,shenzhen starmax, shenzhen xuba and shenzhen new deriy) most of my cells have capacity test performed on them, and they are all above capacity with very high cycles and authentic QR code. i use the best Bluetooth bms, pure copper battery terminals, thick copper 10mm, 16mm,25mm,35mm wires depending on battery capacity.
Premium lithium battery packs are pricey, but better soup na money kill am!
Never will u open up my pack and see low grade crap cells