DMerciful:
Chairman,

Read your link very well and be calibrated. Like i said previously, do more research on what a grid means and where to use grid-tie. I have done this research but just for knowledge sharing, a panel with a micro inverter attached converts the panel DC voltage to AC. This AC is transported to the grid-tie inverter. The grid tie powers the house loads and feeds the excess to the grid while when the panel is not generating enuf, collects the deficit from the grid however it is used in a situation where there is constant grid power. the wisdom behind this arrangement is for cost savings as you can sell to the grid as well as not needing backup batteries. If you must have backup batteries then you will need to incorporate offgid inverter. Mind you, you dont need charge controllers in this case. Solar utility companies use the grid tie/micro inverters most especially

Chuckdee:



WOW!... Congratulations on that massive upgrade GeorgeD!! You keep on amazing us by your trailblazing endeavors, Solar truly works and highly ADDICTIVE i most say too.


Quick one, I understand you choose to mount your combiner box inside your ceiling to be away from prying eyes but wouldn't it be much of a hassle to get inside your ceiling, then crawling to where its mounted just to turn off the breakers when you need to service your setup or in cases of emergency?? Or maybe you have another breaker between the box and CC?..

jazzman2:


Sir, your summation above just shows you don't know much about gridtie nor microinverters. Why would u need a separate standalone gridtie inverter with microinverters? You have already converted DC to AC, so why feed it to another gridtie inverter? Like I said before, do a proper research before publishing on a public forum. Try googling AC coupling, gridtie with battery backup and the info is there for you.

GeorgeD1:


barezzi,
to keep the answer simple, the seemingly large battery bank size is to provide extended hours
of autonomy especially on cloudy days.

Barezzi:

Nice one chairman...
Personally, it's cheaper to run the gen for a few hours a year than spend millions building a large battery bank.
Especially with such a huge PV array.

Your battery bank is okay, i understand the rule of thumb is 100AH for every 1kw array.

So for a 7kw plus array, your almost 700Ah bank dey in order.
I don almost perfect my plans to rob bank. I wan be like you

efuro:


welcome to the forum.
on ur question, it is a pity the information u provided is still scanty. u need to do more.

eg. cable size, make of PWM, ba3 type/bank @ 12/24/48 etc, inverter type. it is a DIY setup etc etc.

how did you size ur bank & refill it up at sunrise before complaining the ba3/inverter indicating low voltage quickly.

mind you with little patience u get help soon ( b/cos u have 3 groups in the house- the DIYs like me, professionals, &marketers)

the DIYs are always ready to help base on their knowledge/limit of experience.

the professionals are simply tired of helping or are keeping certain basic info as trade secrets.

finally, marketers are there for all with after sales advises.

if you're convinced you're not getting enough from the house, pls check YouTube there u have thousands of video on various topics on solar. enter ur comments/questions, ur sure to get help.

cheers!

DMerciful:
Run gen? Generator is haram! forbiden

Feshizzy:


Thank you very much sir For your response,
What I actually need was the correct positioning for the panels,
As it is already positioned facing east as in relation with the roof,

The inverter,
Is a mercury 2.4kva inverter with two very weak 12v 100ah batteries,

And the wiring was done by one very wack techkie using about 10mm cable for about 10 yards

The solar is on the opposite on the roof of a 3 storey building while the cc is on the 2 storey of the building very close to the inverter/battery,

For the controller, it's a cheapo pwm CC of 12/24v 40ah capacity,

Thanks in advance though.

efuro:


A re-visit of picture of ur panel and from a DIY point of review of ur installation, I believe it is sufficient enough to give u the needed energy production. what I find odd is u don't have to peel off the black back of the cable. ur cable size is very ok but why peel of the insulating back?

anyway, 40A Cc is thoughtful, the culprit is ur power bank. the PWM CC goes down to the level of ur ba3 & gradually rise or regulate the voltage/amps to ur ba3. unfortunately ur ba3 are not good thus you keep recording low figures which will grow worst till u replace dem.

with ur present state, I advice daytime workloads & nighttime for led bulbs / phone charging only.

my regards!

Feshizzy:


Thank you once again kind sir,
But I'm more concerned with the position of the panel,
If they are well optimised,
I know the banks and building are weak,
The total harvest was 24ah,
While it was generating 1.4ah
That is less than 30% of the panel rating at peak performance,
I was expecting a generation of about 4 - 5ah during peak period!

chris81964:

The batteries in the video are not mine. However we will be doing an upgrade in a month. I will put them up for sale

nene2016:
Please below is a table of my solar energy need calculations and I would be grateful if the bosses in the house could check it if my calculations are accurate and I welcome your suggestions.

Thank you for your time.

GeorgeD1:


mcci,
the panels are in 3 x 4 configuration making a total of 12 units for both sides.

mcci:


Do you not risk damaging your CCs on very cold mornings? It may exceed the recommended 150Voc

mcci:


Do you not risk damaging your CCs on very cold mornings? It may exceed the recommended 150Voc

jazzman2:

Pls Sir, do some research. You are completely wrong, all microinverters in the market today are gridtie inverters also. Check out this link:
https://www.solar-electric.com/residential/inverters/grid-tie-inverters.html

nene2016:
I have a a keen interest in solar energy since the first day i stumbled upon this thread. Thank you all for the info on solar. I want to start using solar to power my appliances and i would be grateful for some pointers. I want start small and make add-ons as and when funds are available.
For starters i want to start with the following:
1. 5 6W bulbs (on for 12 hrs)
2. 8 6W bulbs (on for 4 hrs cumulatively)
3. 1 Led Tv 90W (on for 4hrs)
4. 2 fans (on 8hrs)
5. Charge phones
What do i need to start the solar journey.
Thank you for your time.

babaegun:
So guys, I finally did it.

Remember my Fangpusun solar CC. I have been able to extract data from it using emoncms...

GeorgeD1:


mcci,

before settling for the 3 x 4 configuration, i ran the module data through various
string sizing tools (morningstar, midnite solar, etc) and got assurance that everything
was alright.
as for cold mornings, it is heartwarming to note that we are living in the tropics where
temperatures hardly fall below 25⁰, so no worries at all.

DUNKA:
chief george really impressive array. Any particular reason you did not go for the higher rated solar world panels?

kiekie1:


Solar world 315w xl mono is an Extra large module best suited for his upgrade .. The 325w xl duo is best used on car port pv systems , field pv systems as it has duo cells (front & back cells).. This module is designed in a way that the back facing cells compensates PV output through bottom/ground reflection. Its not suitable for direct rooftop installations ...

Saipro:
I have been having immense problems replying posts as well as opening some nairaland forums. I have had to device some workarounds. Even quoting posts now requires manual tagging. Anyone else having these issues?

Other Web pages/sites load seamlessly.

Saipro:
I have been having immense problems replying posts as well as opening some nairaland forums. I have had to device some workarounds. Even quoting posts now requires manual tagging. Anyone else having these issues?

Saipro:
I have been having immense problems replying posts as well as opening some nairaland forums. I have had to device some workarounds. Even quoting posts now requires manual tagging. Anyone else having these issues?

Seun:
Which posts and which forums and which network and which phone and which browser?

Barezzi:
You need a battery bank to store twice your total WH(~3000wh × 2)@ max 50% DOD.
Discounting system losses, you're looking at about 500Ah for a 12v system.
Inverters for the range you've chosen are usually 12v.
Such a small inverter may not effectively charge a 500Ah battery bank.

Stepping up to a 24v inverter will drop the battery bank requirement to 250Ah.
30A mppt CC and a 600W PV array.