which solar cell size is best. 3x6 o 6x6?

[Naptown]

The number of amps alone is not what you want to look at. You have to have volts too! The battery charging process will take watts into the Charge Controller to produce amps into the batteries if you use MPPT. Or the amps into the CC at the right voltage will produce the same number of amps out at battery voltage if you use a PWM CC.

We are still talking conversion rates and cell and module efficiency.

[inetdog]

Now you are talking about cell and module efficiency. cell size has nothing to do with this. Conversion rates in W M² is the standard.
With a DIY panel you would be lucky to get 10-12% considering the quality of cells available to the DIY market and having little control over the manufacturing process as opposed to an automated factory will limit efficiency even further not to mention reliability and longevity.

The number of amps alone is not what you want to look at. You have to have volts too! The battery charging process will take watts into the Charge Controller to produce amps into the batteries if you use MPPT. Or the amps into the CC at the right voltage will produce the same number of amps out at battery voltage if you use a PWM CC.

[Naptown]

The more amps gathered per square foot of space used is a factor I consider important, because space might be limited.

Now you are talking about cell and module efficiency. cell size has nothing to do with this. Conversion rates in W M² is the standard.
With a DIY panel you would be lucky to get 10-12% considering the quality of cells available to the DIY market and having little control over the manufacturing process as opposed to an automated factory will limit efficiency even further not to mention reliability and longevity.

[Solar One]

more amps = faster charging

.
the 2 different cells are almost about the same.

6x6 solar cell
Average Power (Watts): 4.1 Wp

²Average Current (Amps): 8 Imax

²Average Voltage (Volts): 0.5 Vmax
..........
3x6 solar cell
Average Power (Watts): 1.8 Wp

²Average Current (Amps):3.6 Imax

²Average Voltage (Volts): 0.5 Vmax
Now you would also have to look at the COST of Each different cell.
the 3x6 cells i get for about $0 .45 cents each. 6x6 are over $1.85
so im saving $0.95 cents to get about the same power.
Good luck and have fun,

Amperage is the volume, the amount of electrons going past a given point over a given period of time.
The voltage is the pressure pushing the electrons.

The higher your amperage the faster your batteries will charge, because there is a higher volume of electrons going to your batteries.
So I believe amps would be an important factor too.

The more amps gathered per square foot of space used is a factor I consider important, because space might be limited.

[russ]

That's 2....

Spammer from Romania

[inetdog]

I have found some documentation on this site:
I am really interested in this as I'm thinking of installing solar panels also.

That's 2....

[HannahSmith]

I have found some documentation on this site:
I am really interested in this as I'm thinking of installing solar panels also.

Please do not post links to other sites particularly ones that compete with this one and are poorly written.

[elhifnawyplast]

2) Panel Hi-Pot resistance. Hi-Pot is a electronics term, relating to high voltage insulation resistance / leakage. No real issues with a single 12V panel. But putting panels in parallel or series, increases the stress they see, and you can come home to a burning panel. As moisture builds, this gets worse!

can you pls give more explanation

[conntaxman]

which solar cell is best. 3x6 o 6x6

On the other hand, if you use twice as many 3x6 cells, you will have 4 tab connections to solder per pair versus 3 for the single cell, assuming that you will parallel two 3x6 strings at some point.
You will have more potential failure points with 3x6, and a three tab cell with one bad joint will work better than a two tab cell with one bad joint.

Whether this makes a difference for you depends on how you value your time and how reliable you want the result to be.

.
I was trying to show JUST the output Mostly, of the two different cells. Their about the same.
You forgot the solder and the solder paste for the joints. oh what about the glass area? I think it should come out the same! oh lets see some other LITTLE pointers, Hummm
why don't you give the person CREDIT of the DIY project.
tell them NOT to use Wood,plastic,fiber-glass resin ETC.
the truth is , that solar OR WIND is NOT THE WAY TO GO TO " SAVE MONEY

[inetdog]

Now you would also have to look at the COST of Each different cell.
the 3x6 cells i get for about $0 .45 cents each. 6x6 are over $1.85
so im saving $0.95 cents to get about the same power.
Good luck and have fun,

On the other hand, if you use twice as many 3x6 cells, you will have 4 tab connections to solder per pair versus 3 for the single cell, assuming that you will parallel two 3x6 strings at some point.
You will have more potential failure points with 3x6, and a three tab cell with one bad joint will work better than a two tab cell with one bad joint.

Whether this makes a difference for you depends on how you value your time and how reliable you want the result to be.

[conntaxman]

which solar cell is best. 3x6 o 6x6

im new in solar system, i want to make my own solar panel for home use, so my first question is wich solar cell size is best 3x6 o 6x6? normaly 3x6 have 2 busbar and 6x6 have 3 busbar, also want to know is busbar effect on solar output? Really aprciate any help
This is really a nice forum, im here after a long search and visting many many forums,
Thnakx

.
the 2 different cells are almost about the same.

6x6 solar cell
Average Power (Watts): 4.1 Wp

²Average Current (Amps): 8 Imax

²Average Voltage (Volts): 0.5 Vmax
..........
3x6 solar cell
Average Power (Watts): 1.8 Wp

²Average Current (Amps):3.6 Imax

²Average Voltage (Volts): 0.5 Vmax
Now you would also have to look at the COST of Each different cell.
the 3x6 cells i get for about $0 .45 cents each. 6x6 are over $1.85
so im saving $0.95 cents to get about the same power.
Good luck and have fun,

[axis11]

OP, if you devote all of your time in making 5kw diy panel, you might be able to finish soldering in 3 months if you are good at it.Lucky if you could make 5kw worth of panels in a year. Try to make a panel or two and see how it goes before you start buying in bulk. The fun part is, before you complete assembling all the panels, those made earlier already starts to fail.

[Mike90250]

There are several major safety issues with DIY (do - it - yourself ) homebuilt solar panels.

1) Moisture ingress. There are few affordable vapor tight sealants for solar panels, and most of those need vacuum lamination to be sucessfull for more than a year or two. Plastic, epoxy, silicone sealer, paint and wood leak water vapor.

2) Panel Hi-Pot resistance. Hi-Pot is a electronics term, relating to high voltage insulation resistance / leakage. No real issues with a single 12V panel. But putting panels in parallel or series, increases the stress they see, and you can come home to a burning panel. As moisture builds, this gets worse!

3) Most, if not all, bare cells sold on the internet, are "floor sweepings" or reject cells. There are several tests done to cells before they are mounted in a panel. Consumers do not have any way to verify these paramaters. You just find a burned up panel one day.

SolarPanelFire_1c.jpg

[Sunking]

If you have power for a few hours a day (Pakistan?) you would be better off investing in a large battery bank and a grid charger with a transfer switch to power critical loads during the outages.
Unless you have a large amount of money A/C will be out of the question during an outage.

Rich I agree but I get the impression he will not even be able to afford the bateries. The other alternative is a generator but I have doubts he could afford that either.

[Naptown]

Thankx for your good information, so what im doing wrong, why DIY pannels are not allowed? what is wrong with them? what is the security risk? and what is nice way to do this job?, im planing this project for thar area that have electricity only for few hours in 24 hours, and temprature is now a days like 45 c o more, so what is your segustion, i really ariciating this forum n your kind help
Thankx

DIY panels have been known to cause fires and can create other hazards as well.
If you have power for a few hours a day (Pakistan?) you would be better off investing in a large battery bank and a grid charger with a transfer switch to power critical loads during the outages.
Unless you have a large amount of money A/C will be out of the question during an outage.