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Are these solar panels any good?

T

Telephonepole

New Member
Joined
Jan 23, 2025
Messages
7
Location
Baltimore MD
Hi,

Can anyone tell me if these are good solar panels to get? I have an opportunity to purchase some at $100 apiece.
LG Solar Panels LG415N2W-v5 415W
Datasheet here --> https://solarproof.com.au/datasheets/panel_datasheet_DS_NeON2_72cells_silver.pdf

I want to use these with two 48volt rack mount 100ah batteries and the Sungoldpower 5000W 48V Solar Charger Inverter All-in-one
Datasheet here --> https://cdn.shopify.com/s/files/1/0..._Specification_1272_compress.pdf?v=1728369077


Thank you in advance.
 
New or used? New LG should be as least as good as any other commercial brand name and a good price for 100/415=24 cents per Watt.
 
Hi there, Iam using LG neon 2 bifacials for over ten years now and I'm very happy.They are solid build with double glass covers-front and back.Even they might not be the most powerful(now) in performance,long-time performance and quality is outstanding....LG stopped producing SOLAR,so not quite sure with warrenty matters,apart from that you're good to go.Their open circuit voltage is in the 50ths and the current near 11A,so you need to calculate how many pcs you have to put in series/parallel.I just had a look at your inverter's datasheet. The max. mppt voltage is 500 with a total of 5500W.Therefore I wouldn't put more the 9 panels in series that gives you some head room in the colder months.with about 450V and 11A you are within the 5500w limit.When I buy solar panels or batteries,I tend to get one or some more especially LG is not producing panels anymore and if you need one (because it's damaged for examp.)you might not get them anymore.....Best regards Frank
 
I would think overpaneling is the goal, and want the max wattage i could get into the inverter.
7s x2p would push you up around 360V, and 22A net you just over 5800W
Heck, going 8sx2 would only push you to 6640 or a little more than 1K overpaneled on strong sun days, but more watts on weak days.
 
frankrudis65 said:
Hi there, Iam using LG neon 2 bifacials for over ten years now and I'm very happy.They are solid build with double glass covers-front and back.Even they might not be the most powerful(now) in performance,long-time performance and quality is outstanding....LG stopped producing SOLAR,so not quite sure with warrenty matters,apart from that you're good to go.Their open circuit voltage is in the 50ths and the current near 11A,so you need to calculate how many pcs you have to put in series/parallel.I just had a look at your inverter's datasheet. The max. mppt voltage is 500 with a total of 5500W.Therefore I wouldn't put more the 9 panels in series that gives you some head room in the colder months.with about 450V and 11A you are within the 5500w limit.When I buy solar panels or batteries,I tend to get one or some more especially LG is not producing panels anymore and if you need one (because it's damaged for examp.)you might not get them anymore.....Best regards Frank
Click to expand...
Thank you for this info. I am new to this and thought i could use 10 panels. Can you explain more of how you came up with 9? The open curcuit voltage is 49.6 or round up to 50 volts. And 500 max volts for the mppt would be 500/50 = 10 panels. Each panel is max of 415 watts so 10 of them would be 4150 watts. Is there something I am missing in the calculation or something else? Thank you!!!
 
Telephonepole said:
Thank you for this info. I am new to this and thought i could use 10 panels. Can you explain more of how you came up with 9? The open curcuit voltage is 49.6 or round up to 50 volts. And 500 max volts for the mppt would be 500/50 = 10 panels. Each panel is max of 415 watts so 10 of them would be 4150 watts. Is there something I am missing in the calculation or something else? Thank you!!!
Click to expand...
This only works if the temps NEVER drop below 78F outside...
 
VOC increases as temps drop.
The panel will have a %increase spec on it usethe cold temp voc calculator with a google search and you will see how bad based on your area record low temps.
One hit over the max voltage and your inverter goes poof...
 
Difficult to say,the inverter's datasheet strangely doesn't state the mppt's Ampere.....Might be an idea to ask the company in that case you can "fully" max out.Best regards Frank
 
Thank you for all the answers regarding the amount of solar panels to use.

But, as far as these particular panels are they any good at $100 each new. Are they something I should buy or look for a more modern panel.

Thanks!
 
Telephonepole said:
Thank you for all the answers regarding the amount of solar panels to use.

But, as far as these particular panels are they any good at $100 each new. Are they something I should buy or look for a more modern panel.

Thanks!
Click to expand...
I would buy some if I could get them without needing to buy 10 minimum ( but you might want more than 10) or have high cost of shipping.
 
Mattb4 said:
It is the new wireless AIO model.
Click to expand...

I figured they just had all the cabling and punch outs behind a metal shield on the front of the inverter.. keeping the batteries in a closet on the other side of the wall or something.

Completely wireless though, that's absolutely shocking!
 
Telephonepole said:
Thank you for this info. I am new to this and thought i could use 10 panels. Can you explain more of how you came up with 9? The open curcuit voltage is 49.6 or round up to 50 volts. And 500 max volts for the mppt would be 500/50 = 10 panels. Each panel is max of 415 watts so 10 of them would be 4150 watts. Is there something I am missing in the calculation or something else? Thank you!!!
Click to expand...
Hi there,the max. mppt open circuit voltage must not be over or too close It's better to keep about 10%lower so about 450v.The max mppt Ampere shouldn't be over as well,but a decent mppt draws as much as needed as power is not forced but absorbed .....Now you can play with those numbers a bit,for examp going for a lower voltage and therefore in parallel.For ex. 6 ,panels =300V on 5.5KW max mppt would give you a 28.4A.If you had a panel with 9-10A you could put 6s2p(12pannels of which 6 are in parallel.Some say it's better though to go nesr the max system voltage and rather have 2 mppt's to double the power....There are always several option,which of course doesn't make it easier to choose 😱Best regards Frank
 
frankrudis65 said:
Hi there,the max. mppt open circuit voltage must not be over or too close It's better to keep about 10%lower so about 450v.The max mppt Ampere shouldn't be over as well,but a decent mppt draws as much as needed as power is not forced but absorbed .....Now you can play with those numbers a bit,for examp going for a lower voltage and therefore in parallel.For ex. 6 ,panels =300V on 5.5KW max mppt would give you a 28.4A.If you had a panel with 9-10A you could put 6s2p(12pannels of which 6 are in parallel.Some say it's better though to go nesr the max system voltage and rather have 2 mppt's to double the power....There are always several option,which of course doesn't make it easier to choose 😱Best regards Frank
Click to expand...
Thank you
 
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