SolnergyPower:
Please provide answer to the following

a. Your loads
b. Run time
c. Your location

That will help to further diagnose the system.

omotoda:



To start with,we need to know the arrangement of the solar panels.From the schematic layout, your charge controller is 70 amp with max VOC 150v.I am quite certain that us grossly inadequate to cater for the input from you panels so some energy us going to be wasted.I don't what the Voc of each 350 watts panel.is but my guess is it will be close to 48v.

Which means you cannot have more than 4 connected in series.

My advice is this.Get a qualified solar engineer to look at the PV arrangement. I would advice you get another charge controller and separate the panels cos you are charging two batteries connected in parallel.

The arrangement should be 3s2p for each set up going into into each of the charge controllers and ultimately to the batteries.

If you had sought advice earlier, for this huge set up it is better you buy an hybrid inverter capable of taking up to VOC of 500v

You should subsequently see an improvement but ultimately you need to still increase your panel size.Total of 4200 watts is not sufficient to charge 2 of those 48v batteries when you consider losses as well.

As usual,the experts will still give their take!!!

omotoda:



And may I add,please change your installer.For this investment you.put up,the installation is untidy and doesn't show someone who knows his onions.He can't trunk cables,wires flying up and down.

omotoda:



To start with,we need to know the arrangement of the solar panels.From the schematic layout, your charge controller is 70 amp with max VOC 150v.I am quite certain that us grossly inadequate to cater for the input from you panels so some energy us going to be wasted.I don't what the Voc of each 350 watts panel.is but my guess is it will be close to 48v.

Which means you cannot have more than 4 connected in series.

My advice is this.Get a qualified solar engineer to look at the PV arrangement. I would advice you get another charge controller and separate the panels cos you are charging two batteries connected in parallel.

The arrangement should be 3s2p for each set up going into into each of the charge controllers and ultimately to the batteries.

If you had sought advice earlier, for this huge set up it is better you buy an hybrid inverter capable of taking up to VOC of 500v

You should subsequently see an improvement but ultimately you need to still increase your panel size.Total of 4200 watts is not sufficient to charge 2 of those 48v batteries when you consider losses as well.

As usual,the experts will still give their take!!!

adrusa:



I agree mostly.

There are two possibilities; your load is bigger than this setup or the setup is not maximizing its potential.

1. What is the maximum wattage of charging power have you ever noticed?
2. What is your load like during the day?

When we know the answers, we may be able to offer an opinion on your setup.

en0uwem:

Okay thank you. Do you know any good installer in Benin City?

EPOMA:


With the money you spent , you could have flown someone from lagos to come install that thing properly . It is a dirty and bad job that was done there , you should get someone from lagos or Ibadan that can come in and make you enjoy your system

adrusa:


Why would he need to fly in someone from Lagos? Is Edo State a jungle or the only good installers are in Lagos?

en0uwem:


1. The maximum wattage I've read from the charge controller is 3 kilowatts

2. I use these in the store:
30 6watts ceiling led light. 6 24 Watts ceiling led light. 1 led television. 1 standing fan. A chiller that we turn on occasionally - maybe 1hour a day. One outdoor led video display - I don't know the wattage, but we also turn it on occasionally.

en0uwem:

a. 30 6watts ceiling led light. 6 24 Watts ceiling led light. 1 led television. 1 standing fan. A chiller that we turn on occasionally - maybe 1hour a day. One outdoor led video display - I don't know the wattage, but we also turn it on occasionally.

b. 7am to 6pm

c. Benin City

en0uwem:
Good day everyone.
This is the solar system that was setup for my store. It's been about a month now since it was setup.
The problem with this system is that harvesting and charging is very poor. It barely charges well. And I am using it off grid - I only charge with the solar panels.

The charging is slow and if it continues this way, I fear the battery won't last as I hardly get a full charge. It's always one or two bars charging on very sunny days.

Please what should I do?

ojeysky:


You need an average of 1.5kw supply so go for the following:

3kva 48v inverter - growatt or axpert variants so long as it's littium compatible
For 14hrs backup time (7 to 9am) you need at least 21kwh which is 437AH You can start with 200AH 48V LFP battery and increase capacity later.

Minimum 6kw array size. This also mean you may need external CC or just get a 5kw hybrid instead.

The above will gulp about 2m

limsycutey:
What can I get for like N400k? Also, Can one be charging inverter with generator?

limsycutey:
Thanks but my pocket no reach that o

en0uwem:

a. 30 6watts ceiling led light. 6 24 Watts ceiling led light. 1 led television. 1 standing fan. A chiller that we turn on occasionally - maybe 1hour a day. One outdoor led video display - I don't know the wattage, but we also turn it on occasionally.

b. 7am to 6pm

c. Benin City

ojeysky:


You can get a 50AH lithium or 200AH lead acid. A 1.5kva 12v hybrid inverter and a 400w panel. That will power your bulbs and maybe TV. Yes you can charge with generator

OkoroPeugeot:


https://mercurydirect.com.ng/product/mercury-3kva-solarxx-hybrid-inverter-mppt-scc-2x-100ah-deep-cycle-batteries-2x-250-watts-mono-solarxx-panels/

ojeysky:


Axpert variants inverter 320k
400w X 14 of PV 1,120k
200AH battery 600k
Total 2.040k he can add another 60k for accessories so yes 2m is not enough, if using good PV it will be 2.1m

en0uwem:
Good day everyone.
This is the solar system that was setup for my store. It's been about a month now since it was setup.
The problem with this system is that harvesting and charging is very poor. It barely charges well. And I am using it off grid - I only charge with the solar panels.

The charging is slow and if it continues this way, I fear the battery won't last as I hardly get a full charge. It's always one or two bars charging on very sunny days.

Please what should I do?

earthrealm:


Wow your setup has good components.
Victron mppt charge controller plus 2 felicity 10kwh lifepo4 banks, but the connection is really tardy, not professional at all..considering the cost of your components.


If you are in gra axis or within 10km radius from obas palace, could link u up with someone competent to audit your system.
The system must work o...

I hope the kartel inverter was configured properly for lithium?

olopan:
Having check your recent comments, your loads are within a minimal range (600 - 1200W) battery should charge well, though panels could have being more

Your panels may be averaging 2KW - 3.6KW instaneously on ideal cases I.e. if they are all installed on a single plane I.e. one side of your roof

From my own POV I suspect your panels are installed on different side of the roof, dragging and shifting the power points of power via the charge controller.

If you can provide pictures just ascertain this point,

Also, lastly to note is that I pray and hope that your panels are not a "refurbished,used,tokunbo,UK used" solar panels .... If that is the case then that is another angle to look at things from.

en0uwem:

The panels are installed on a single plane - one side of the roof.
They're new panels. But I don't know if they're cheap Chinese panels. I'll check in the morning. Thank you

en0uwem:


Yes, I'm very close to Oba Palace. I'll send you a message in the morning.

I don't really know if the installer is competent with setting up lithium battery installations cus I'm beginning to doubt it. I think the installer is only good with lead acid battery installations.

omotoda:


My brother,just let another competent person have a look and do a proper,tidy and neat connection. No professional installer will do this kind of job.He even joined a live wire with black tape mid way.How nah !

You have spent good money in this Buhari economy to have this kind of annoying set up!!!

NiyiOmoIyunade:
Sorry I am late to this party. I typed a response but the NL bot swallowed it.

You want a device like the XH M611 as your best solution (find it on AliExpress) - I have found the inverse logic of the second device CDxxxx a bit unwieldy.

My advice is to not modify your inverter on/off switch in any way. Simply power the LVD device from your battery bank, and use it to energise a relay/contactor that disconnects the inverter AC output once the LVD setpoint is reached.

The sequence is battery bank - LVD device - relay/contactor - inverter AC out.

You need to select a relay or contactor whose coil voltage matches your battery. I use a cheap 48v DC 5a relay to energise a larger 220v AC contactor coil - if you go this route all you ever need do is change the relay to a one with a suitable coil voltage for your application whether 12v or 24v or 48v nominal every other item in the BoM stays thesame and keeps things simple

en0uwem:
Good day everyone.
This is the solar system that was setup for my store. It's been about a month now since it was setup.
The problem with this system is that harvesting and charging is very poor. It barely charges well. And I am using it off grid - I only charge with the solar panels.

The charging is slow and if it continues this way, I fear the battery won't last as I hardly get a full charge. It's always one or two bars charging on very sunny days.

Please what should I do?

cell7:
Pls how reliable is POWMR mppt charge controller. Who amongst us has used it?