litaninja:
A quick question about this. The equal length cabling is the typical recommendation for Lead Acid batteries, however with Lithium, each pack is an "entity" on its own with BMS, breaker, e.t.c.
Is it still necessary to follow this recommendation strictly since the BMS will still end up balancing the individual cells with minimal differences in the voltage getting to busbars / inverter?

it is necessary so as to ensure equal current draw from both batteries

Trippledots:


Available if you are in Lagos.

Yeah, the Island. Will reach out

Trippledots:


That boy that came for maintenance is my prime suspect. You have to know how to bypass the connection to be able to successfully steal that thing without the users knowing. Trace when your wife asked you that question, if it was after the boy visited, go use slap and knock make the boy talk truth.

He did not deny it. He only said he is sorry for everything

Thanks for your input. But if i may ask Sir/ma, how many unit you think i can go for minimum?

Riosystem:


You can use Addo smart tabular battery, You will have rest of mind

Just sorry ? And thats all ?

Compliant:


He did not deny it. He only said he is sorry for everything

twinskenny:
My seniors I need your help

I did this setup last week, now we are about to add the second battery to it both Bluecarbon 15kw….


Please how do I parallel both? So I will get a single source out of them ?


Thanks a lot…

I would be more concerned about combining two different models though.

QuoteJust1nce:


Yeah, the Island. Will reach out

Ok

Compliant:


He did not deny it. He only said he is sorry for everything

Ok

Compliant:


He did not deny it. He only said he is sorry for everything

ok

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kristien4:
Greetings to the house. Can i connect 9pieces of jinko 580w panel [ 51v VOc @STC] total 459v to a growatt spf 5000es[max voc 450v] and just hope that cable losses, environmental conditions will clip the extra 9volts or more. Is it a bad gamble?

Alright, I've done the tests and all I can say is MPPTs are interesting devices.

#1: Battery fully charged. Time 2:30 pm. As close to peak irradiance as I can get. PVs are sending out 138-140v but just 1A. Essentially the power I need to run my idle load.

Note: Even without any load on the inverter (switched to grid input) my incoming voltage doesn't go past 140v.

#2: I turn on my air fryer. Voltage from PV drops to the minimum 120v rating of my inverter. Current rises to 8.5A to meet the energy demands of the air fryer.

Inverter is a 3.3KVA SRNE high-voltage model. I have three 580w Jinko panels connected in series to it. Panels are rated at 51v VOc at STC, but 48.5v NOCT.

At 140v, it appears I'm actually getting around 46.5v from each panel at peak irradiance.

Does that mean you should exceed your VOC by the 9v you quoted? Well, if my tests are anything to go by, you'd probably be safe. In the first place, you're never going to be getting STC numbers. My panels were at 41° during this test. Find attached Jinko's graph on temperature vs voltage. At a glance, it appears the panels only make about 93% of VOC at 41°.
Also, there are losses from cables.

At the end of the day, though, it's your call to make.

earthrealm:


Use a busbar..
Use equal lengths of cable to connect both battery packs to the busbar.....then do same busbar to inverters

Bless you sir

HeavenlyBang:


Alright, I've done the tests and all I can say is MPPTs are interesting devices.

#1: Battery fully charged. Time 2:30 pm. As close to peak irradiance as I can get. PVs are sending out 138-140v but just 1A. Essentially the power I need to run my idle load.

Note: Even without any load on the inverter (switched to grid input) my incoming voltage doesn't go past 140v.

#2: I turn on my air fryer. Voltage from PV drops to the minimum 120v rating of my inverter. Current rises to 8.5A to meet the energy demands of the air fryer.

Inverter is a 3.3KVA SRNE high-voltage model. I have three 580w Jinko panels connected in series to it. Panels are rated at 51v VOc at STC, but 48.5v NOCT.

At 140v, it appears I'm actually getting around 46.5v from each panel at peak irradiance.

Does that mean you should exceed your VOC by the 9v you quoted? Well, if my tests are anything to go by, you'd probably be safe. In the first place, you're never going to be getting STC numbers. My panels were at 41° during this test. Find attached Jinko's graph on temperature vs voltage. At a glance, it appears the panels only make about 93% of VOC at 41°.
Also, there are losses from cables.

At the end of the day, though, it's your call to make.

Thanks. I appreciate

HeavenlyBang:


Alright, I've done the tests and all I can say is MPPTs are interesting devices.

Thanks for the reply, but when you said you've done it, thought you exceeded the maximum VoC of your system. In this Growatt scenario, we want to have someone exceed slightly the maximum VoC to see what happens.

Sankabson:
Thanks for your input. But if i may ask Sir/ma, how many unit you think i can go for minimum?

You can go for 4 but you will improve on it/increase it subsequently.

mctfopt:


Thanks for the reply, but when you said you've done it, thought you exceeded the maximum VoC of your system. In this Growatt scenario, we want to have someone exceed slightly the maximum VoC to see what happens.

Look at this man, you dey find who wan use their inverter do expensive experiment.

Can someone please recommend a charger for my 12v 100ah lifepo4 battery

Keemie:
Can someone please recommend a charger for my 12v 100ah lifepo4 battery

available... 12v 20A lifepo4 lithium battery charger 45k.

HeavenlyBang:


Look at this man, you dey find who wan use their inverter do expensive experiment.

Someone is having a similar issue I'm having. Trying to get a solution. Not asking you or anyone to do anything. Some may already have this experience.

I have given repairer both inverter and controller the guy told me that the Felicity controller is repairable and it will cost 25k while the fore solar inverter is 50/50 and he told me 40k for that

osayuwamwen:
Lighting killed my inverter and Felicity controller last night, am so pained

osayuwamwen:
I have given repairer both inverter and controller the guy told me that the Felicity controller is repairable and it will cost 25k while the fore solar inverter is 50/50 and he told me 40k for that

Most times they can't be repaired. Might be converted ..where are u based?

I base in Benin, do u mean the inverter?

Lifemanage:

Most times they can't be repaired. Might be converted ..where are u based?

osayuwamwen:
I base in Benin, do u mean the inverter?

Please can i have the contact of the repairer..

Compliant:


Same thing happened to me some days ago here in abuja. My 3.5 inverter just went off during the lightning while my 2.5 inverter installed beside this 3.5 is just working normal.

I had to call the installer to get explanation as to what happened because i have a surge protector installed.

He came around to check ONLY for us to see that someone had removed the surge protector and the only person that came around to do maintenance work was his boy, we called him and he said he saw the surge protector there but did not touch it, meaning a ghost came to my house to remove surge protector guys.

Today i was told by the repairer that the board is bad and a new board is around 140,000 to 160,000
( i dont know true this is)

Which product of inverter please

mctfopt:


These guys have a whatsapp group for charges as a friend just paid a similar price to fix a 3.5kva. Sorry about that

Please add me to the group

HeavenlyBang:


Look at this man, you dey find who wan use their inverter do expensive experiment.

Nawa over 700k inverter 4 experiment.

Compliant:


This is the 2.5, it has inbuilt charge controller but the installer advised me then to use external charge controller and I followed his advised, when the lightning affected the 3.5, this 2.5 was not affected

The difference is clear.
Those in support of transformer based say I those against say nai...

The I's have it .

mctfopt:



What's your wattage consumption on gen mode?

i dont have honest review of consumption now since have disabled my monitoring meter long ago. All i know now is i can use my AC with all other average load of 300w till daybreak with my 12.5kwh lithuim pack.

osayuwamwen:
I base in Benin, do u mean the inverter?

Yes

isnigeriadead:


i dont have honest review of consumption now since have disabled my monitoring meter long ago. All i know now is i can use my AC with all other average load of 300w till daybreak with my 12.5kwh lithuim pack.

U be senior man oooo..
.12.5KWh lithium pack.... oooops

Obnoxious2001:


Which product of inverter please

Usually true

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