chris81964:


I would buy a second controller and call it a day. Less headache and not much in the thought process department.
Should he decide he needs the headache, the voltage of his existing panels needs to be brought close to the voltage of the newer bigger one. He will lose some of the benefits he got from buying the larger panels after going through all that headache.
My two cents.

Im2Busy2Bother:


Thank you for taking out time in your busy schedule to drop a comment. I'll relay your observation to him.

How do you bring the voltage of existing panels to that of new one?

chris81964:


Series connections

AkoEja:
Can you gurus comment on my setup?
My total load comes to 450 watts . Small fridge and a freezer consuming 200W, LED TV 110W, Light's and fans 140W.

Setup is as follows
Inverter ...1.5KVa
MPPT Charge controller.....40W
Two 200AH Quanta Batteries ....connected in parallel for 24 Volts.
Two 190W solar panels

Assuming I run this load for approximately 7 hours per day.....though will not all run at once. Generally will only run freezer when it's sunny.

Please do you think this is adequate...and if not ..why?

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You can do the math yourself
Figure the Watt hours divide by 24 to determine your consumption in AH. That number is how many AH you use. Now determine the minimum depth of discharge for your batteries and increase the ah to compensate.
Then divide the total Watt hours by 4.5 if no NEPA or 6 if you have NEPA. That will answer the question about your Panels.

chris81964:

You can do the math yourself
Figure the Watt hours divide by 24 to determine your consumption in AH. That number is how many AH you use. Now determine the minimum depth of discharge for your batteries and increase the ah to compensate.
Then divide the total Watt hours by 4.5 if no NEPA or 6 if you have NEPA. That will answer the question about your Panels.

semitunde:


Pls, Can you give a configuration with cost, of a 5kva inverter supply with solar panel?

The capacity and type of batteries needed, type of inverter recommended, type/size/no of panels and cost for the required solar panels to charge the set up?

Thanks.

semitunde:


Pls, Can you give a configuration with cost, of a 5kva inverter supply with solar panel?

The capacity and type of batteries needed, type of inverter recommended, type/size/no of panels and cost for the required solar panels to charge the set up?

Thanks.

AkoEja:

Thanksfor your help.
My AH is therefore 450 x7 x 1.6 = 210AH for 40 % depth of discharge.
Divided by 24 gives me 46.6 AH
What is the basis for dividing by 4.5 with no NEPA or 6 with NEPA?
Many thanks again

chris81964:


Bros your numbers are off. How did you get 450 AH?
Take your load eg TV 150 watts.
You will watch TV for 8 hours a day. 150 x 8 = 1200 watt hours.
Do the calculation for all your lights fans and appliances you want to run on solar power. Add up the total
If your total is 1200 watt hours. To determine how much in battery you will be using
1200 / 24 =50 AH. (24 is the voltage of your inverter)
At a 50% SOC that number is 100 AH. You can figure what 40% will be.
To determine the panels 1200 / 4.5 = 267 watts. You will need 267 watts in panels to maintain that TV for 8 hours. (4.5 hrs = sun hours)
We have answered these questions many times before. Go back and read comments and threads explaining what these numbers mean.

abunafiu:

I suggest you go tru bigrovar's post ahead Where he presented details to assist in recommending solar panels etc.
You need to list ur appliances and the number of hours of use etc.
They way you placed your question might not get answers here.
so kindly rephrase sir.

chris81964:

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AkoEja:
Are two 12 volts batteries in parallel rated at 200AH each, equal to 400AH together?

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okoegualek:



whats is difference between:
1.5KVA/24V ION 53,000
1.5KVA/24V ECO 53,000
thanks.

AkoEja:
Thanks, I think your explanation is very clear enough. The 450 watts is the total of all the watts for my appliances, as follows:
TV ..110, Fridge and freezer ..200W, 2 fans and lights ..140 watts making 450 watts for all . I just assumed I will run all for 7 hours to get a rough calculation. Obviously won't switch all on at the same time.

This means my total watt hour is 3150 watt hours and my total amp hour is 3150/12 = 290AH(12 volts battery-two 12 volts batteries in parallel connection ). My total watts to run for 7 hours is 450 x 7 = 3150 and I will need 3150/4.5 = 700 watts solar panels

But are two 12 volts batteries in parallel rated at 200AH each, equal to 400AH together?

bigrovar:


How did you get the figures for the Fridge and Freezers? They seem very conservative IMHO. Did you get the figures from the equipment label or u used a watt meter? If it was just an estimate then you might want to review them up a bit to like 300 - 350w but it would be best to get a watt meter which would give a more acurate reading. Also it might be wise to get a programmable timer to set when the frige and freezer can come on.. Maybe at around 10-12 noon when everyone should be at work. 2 hours should be sufficient for an efficient freezer to ensure the soup dont go bad. Remember this is worst case (NEPA went awol transformer blew up) scenerio. Also note that both require an starting power of (sometimes ) x 3 of their rated input.

If you TV is LEd what is the size? Unless it is somewhere in the range of 50ish and or was bought 4 hours back.. The 110watt might be a bit high.. Most new led TV's are very efficient.. Most 32 led TV run within the 40-50w range.. Some even go lower.
For the fan ceiling or circulation.. Put 88w each to be safe.. And also ensure you use energy efficient light bulb.. It would help u alot. I got 12 8w Philip energy efficient bulbs from Jumia last year. All my about 11 bulb run for 88w.

Regarding batteries. I would advise you avoid the common SMF deep circle batteries. Unless you want to keep your dod at 50% even that would only guarantee you like 300 circles .. Get a tubular battery which can guarantee close to 1200 circle at 80% dod.

My humble submission

AkoEja:

Thanks for your comments. .really useful
The freezer is made by Chigo and it says 110 watts on the label and the fridge is a small one..70 watts.
The TV is LG LED (42 LA620V) 42 inches and it says 110 watts on it. The fans are two standing fans 45 watt's each on the label. I am going to replace them with two Lontor rechargeable fans so that the inverter is not used at night....we use the rechargeable fan batteries only (lasts 12 hours at low setting). The Lontor fans say 20 watts at low speed.
All the bulbs are low energy 7-9 watts LED bulbs ( 5 of them with usually just 2 or 3 on at once)
As advised. .will invest in a watt meter. I will also get timers for the fridge and freezer with freezer on for like 3 hours during the day when it's sunny and the fridge also 3 hours...but not at the same time. TV will only be used when we have excess power and fridge and freezer are not on.
Where do I get tubular batteries.. and are they maintenance free? I'll answer this.....tubular batteries are low maintenance and last longer than twice that of ordinary deep cycle batteries. ..4-5 years or longer versus 3 years

bigrovar:


I think you have it all figured out then. From all indications your estimation for the appliances should be between +-10% actual wattage which is fair. I will look into the Chigo freezer sha.. 110w is quite interesting. You TV would use considerably less watt that you are estimating though.. My guess would be around 60w and low if you select eco mode.. led tv consume way less. But setting a higher figure won't hurt.

I intend to go for Luminous Tubular Batteries.. because it is the only one made using the HADI casting which allows the battery to be more Corrosion resistant, Resistance to High temperatures, Low self-discharge, Resistance to abuse, Lightning fast Recharge.. You can also get USBatteries and Trojan who are also reputable brands but cost a bit higher

AkoEja:

I thought luminous brand is not great in battery tech though they make good inverters

donmajor2:
What a great thread! After following this thread for quite some time now, I am glad to begin with a humble entrance into the renewable energy world.

Many thanks to Sir Frankie(Kiekie) for his prompt delivery of Two 12V Trojan batteries and 2KVA Voltron pure sine wave inverter to my doorstep in Benin City.

Special thanks to all the gurus in the house as you make time to respond to virtually all the questions from the newbies like me. I will appreciate your mentoring as I sojourn the solar way.