LED Solar Flood Light Dusk to Dawn Security Wall Street Yard Outdoor Lamp modifications are in order

[sam_sam_sam]

I bought one about a month ago from an eBay seller who now is out of stock however I found another eBay seller that has the same version of this device so I think about buying a few more of over a period of time

Awhile back I bought some A123 brand 18650 battery cells that are 3.2 volt battery cells that I am going to use in this device for more running time in a florescent bulb fixture that I gutting out the tube sockets and turn it into a solar powered LED lighting fixture instead

Pictures will come later when I have the lighting fixture gutted and have the battery packs made and mounted

https://www.ebay.com/itm/16681855932...3ABFBM5N2bpqhk

[redwire]

300W yet 44 LED's, hmmm some math 6.8W each. Pic shows 60 LEDs for 5W each.
"1200mAh large capacity battery makes the lamp continue to illuminate for 8-12 hours(fully charged).
"Battery Capacity: 8000mAh"
"Working Time: 8-12hrs"

Is swampland still for sale in Florida, I'd like to buy some with a beach and no gators.

I can't tell what you're really getting other than chinese fake specs.

I think most important is it can run all night, even though dimmer. What battery size did it have, or needs to have?

[petehall347]

no specs for the panel . just the dimensions . about a foot square so guessing about 1/2 an amp if lucky .

[sam_sam_sam]

no specs for the panel . just the dimensions . about a foot square so guessing about 1/2 an amp if lucky .

I would agree with you that there are no specifications for the solar panel but I used my multi meter and did a direct short the wires from the solar panel and got 1.4 amp output which I was surprised by that I was only expecting maybe 500 to maybe 800 milliamperes maximum one note the solar panel had been outside all morning and when I did this the sun was straight up and over head

[sam_sam_sam]

300W yet 44 LED's, hmmm some math 6.8W each. Pic shows 60 LEDs for 5W each.
"1200mAh large capacity battery makes the lamp continue to illuminate for 8-12 hours(fully charged).
"Battery Capacity: 8000mAh"
"Working Time: 8-12hrs"

Is swampland still for sale in Florida, I'd like to buy some with a beach and no gators.

I can't tell what you're really getting other than chinese fake specs.

I think most important is it can run all night, even though dimmer. What battery size did it have, or needs to have?

Yes there still is swap land available for sale unfortunately it not cheap anymore I do not know if you can get a beach in the deal I can not promise you that you will not have gators as friends

First of all I would agree with you that there is no way that this LED panel is 300 watts maybe 30 but I doubt it it might be 3 watts if you are lucky enough because the heat sink is a very thin piece of aluminum with one side of it with thermo paste and not very much of it

I would say I do not think that the LED panel is being over driven if anything it might be a little under the rating which would be a good thing for the LEDs to last for a while

Yes I know about the Chinese spec are extremely inflated and I do not believe any of it like I said earlier I was mainly interested in the solar panel and from the picture it looked decent so I took a chance that it was decently made but even this aluminum frame is is so cheaply made that it is a joke

The battery is a ( one battery cell only 26700 ) Chinese brand and no brand name it claims 4.something amp hours I have not load tested it yet so I can not comment more about it until I run some tests on it and then I can answer some of these questions

Running I can not comment on this because I have not done a current test on the LED light panel yet but I have my doubts about weather or not it could run the LED panel light for eight or twelve hours but I will compile the results when I have all the information data in front of me because I am curious about this myself

I probably got my money worth for what I assume the quality that it might be so I was not surprised by what I received from the eBay seller

The heat shrink tubing is similar to this one and what is printed on is similar but it is 4 amp hour if I remember correctly

https://www.ebay.com/itm/38609146420...3ABFBM3IK7w6hk

[petehall347]

I would agree with you that there are no specifications for the solar panel but I used my multi meter and did a direct short the wires from the solar panel and got 1.4 amp output which I was surprised by that I was only expecting maybe 500 to maybe 800 milliamperes maximum one note the solar panel had been outside all morning and when I did this the sun was straight up and over head

looks good for its size then . do they have a diode included ?

[sam_sam_sam]

looks good for its size then . do they have a diode included ?

But remember it probably a 4 to 5 volt solar panel so that it possible this could be right
No it does not have loose diodes however it does have a charging controller which also controls the LED light panel as well with a remote control which it is decent enough to give you three light levels my only complaint is that it does not have a hard wired on off switch to control the LED light panel but it does have a charging LED light so you know that it is getting sunlight but you do not know how much sunlight it is getting

One note when I shorted the solar panel I did it to the battery BMS protection board so I know that it can at least handle the 1.4 amp output from the solar panel

One other note the LED light panel says that it is a 3 volt panel

Of course the battery was not hooked up when I did this test

[sam_sam_sam]

Well I managed to find my new battery stud welder that got misplaced in a container that was because I had to pack up some stuff and move it to my old shed plus the 18650 plastic battery holders that got put in a container as well with other battery related items which was not as hard to find

Now I can weld together a better battery pack for the solar panel that had a one battery cell that was Chinese made and I do not know what the actual milliampere hour it is

What would be a good milliampere hour size battery pack should I build for a solar panel that can put out 1.4 amps when the solar panel is hot so that the battery pack can still have roughly 40% battery power left after the LED light panel has been on for a maximum of 8 hours of continuous running time

I will have to get the current of the LED light panel
The battery cells are 1.1something amp hour 3.2 volt version charged to 3.5 volt maximum A123 brand with a high maximum current rating from Battery Hookup about a year ago or so they are not available for sale now unfortunately but I have 200 of them so I have enough to do several battery packs in different configurations

When I bought these battery cells I was not sure what solar power project was going to build but when I found this solar LED light panel I thought this would be a great project for these battery cells

One note these are brand new battery cells never used but were meant for a project that was discontinued and the battery cells were sold off as over stock

I am thinking about putting 6 battery cells together to make this battery pack which would probably give me a 7 amp hour battery pack which would probably give me a good running time on medium power setting on the LED light panel

[redwire]

Napkin calc, rough math is 1,000mAh battery for 10hrs is 100mA load or around 3.2W total LED power. Although in reality it starts off higher voltage and current, and droops down at the end.
You don't really want to exhaust the battery every night, it won't last and some days are cloudy so it won't charge recover enough to keep operating. A 1.4A panel should be good with 7Ah pack especially if you are in sunny clime.

[sam_sam_sam]

Napkin calc, rough math is 1,000mAh battery for 10hrs is 100mA load or around 3.2W total LED power. Although in reality it starts off higher voltage and current, and droops down at the end.
You don't really want to exhaust the battery every night, it won't last and some days are cloudy so it won't charge recover enough to keep operating. A 1.4A panel should be good with 7Ah pack especially if you are in sunny clime.

I was thinking about making it roughly 7 amp hour battery pack so just confirm what I was thinking about making thanks for the suggestion and input

[sam_sam_sam]

Here is a picture of the battery pack and the LED light module and the solar panel setup
Now I have to work on the light module and get it to fit in an enclosure with the battery pack or use a different LED light bulb module that is also a 3 volt LED light bulb module that is not a remote control unit which is probably what I am going to do if I can get it to work properly if not I use this module instead but we will see what happens when I try to it

But I would need to use a PWM controller for the brightness of the LED light module because it is only controlled by an on and off switch and I do not necessarily want 100% brightness all the time

The battery pack has the following amp hour batteries The battery pack is configured as follows 1S6P
Battery one 1.179
Battery two 1.179
Battery three 1.178
Battery four. 1.178
Battery five 1.176
Battery six. 1.176
The total amount of amp hours is about 7.066 but this is without the BMS protection board being used so the actual amount of amp hours might be a little bit more or less than this

One note I would only be using this LED light when I am working in the shed so it not be used as light to light the outside of the shed but I would like to make one that lights up the outside of the shed for maybe for six hours a night and if there are days that there is not enough sunlight and the battery voltage is low enough for it not to come back on unless it nearly fully charged again but this is another project and I think that might use two solar panel with two separate battery packs but only one light module

One other note the cost of each battery cell was $0.85 X6 = $5.10 for this battery pack

More to come later when I have more of this project completed

On a different note I thinking about building a 12 volt battery pack using these battery cells but I would have to get a BMS protection board for these battery cells because I do not have the 3.2 volt version I have the 4.2 volt version for a couple of battery backups that need a new battery pack but the issue I have is to configure a 4S6P but this battery pack is probably going to be bigger than the battery compartment of the battery backup and I really do not want an external battery pack for this modification but we shall see if I can get some other battery cells with more amp hours but less maximum current capacity for the right price from Battery Hookup then this would not be a problem I might even consider using 21700 battery cells but they have to be cheap enough to possibly buy a 100 of them so I can closely better match the amp hours between battery cells for better performance in the battery pack

[sam_sam_sam]

When I wrote that the cost of each battery cell was it also included the shipping cost as well

[sam_sam_sam]

Well here are the amp hours results of the battery pack 7.2 that I just built ( charged to 3.5 volts discharged to 2.5 volts )

Now it is time to test the function of BMS protection board it's testing results will come soon

[sam_sam_sam]

I had time yesterday to remove the LED light module from the BMS protection board and put it on the battery testing machine I know I need to stop doing this but right now I do not have a working BMS testing jig setup working properly right now but I need to get busy and get this working properly and stop using the battery testing machine that is not designed for this purpose

Here are the discharge test results 7.25 amp hours roughly this is what I expected from the BMS module and the battery cells configuration that I used

But I am not trilled with what I saw on the discharge test graph results is that the battery voltage cutoff was was not what I expected to see 1.7 volts really is this crap

Here is testing results graph for the discharge test

Now I have to jump start the BMS board so I can start the charging process but I going to do it in such a way to see what the cut in voltage is but this is not always easy to do but you can get a rough idea what it is most of the time

The cut in voltage is around 2.5 volts which is what I expected it be it might be a little bit lower than this but I do not have my adjustable switching power supply running right now in fact it not on the bench right now I just used a battery cell that I had recently tested to jump start the BMS protection board

I set the cutoff voltage on the battery tester to 3.75 volts cutoff voltage yeah I know that this is a little bit higher than it should be but I want to know what the actual cutoff voltage really is so I can determine if I need to use a different BMS protection board or not

[sam_sam_sam]

Well the results of the cutoff voltage when charging is not much better and it appears to be for a regular battery cell voltage of 4.2 volts not for the 3.5 volt version so I have to try it on a 4.2 version battery cell and see what the cutoff voltage really is but I am not impressed with the results that I am getting from this BMS protection board

I have seen better BMS protection performance in other boards than this particular one and depending on its cutoff voltage I use it for nicad battery packs protection instead

[sam_sam_sam]

I have not had time to devote to this project for the time being I have had other issues other priorities come up but I hope to get back to it soon