Solar LED 2835 strip with rechargeable battery, controller and night sensor? Answered
Needing help with a solar set up to recharge and power a small led strip with 2835 LEDs.
I need a small strip of bright LEDs to light up a address block during the night and it is in a rock column. I want the set up to be as visually minimal as possible. My plan is to have a solar panel charging a battery during the day, have the sensor turn the light on at dusk and off at dawn. I have a reel of 2835 LEDs and I want to cut a 1 Ft length of them and mount below the address block to illuminate it. I already have all the mounting details set and how I plan on running the wires. I will put the battery, controller and dimmer in a box on the back of the column and close it off and run the wires through the mortar to the LED strip which will be sitting on a rock shelf. The solar panel will be mounted on the top of the column which is almost totally flat. My questions and assistance needed is on the design of the solar components, battery, controller, wiring, design and if it I have it all correct and it will work. I have done hours of research on the net and think I have an understanding of this, but would like one you electronic wizards to proof my concept and provide any input on things I might need to add, change or improvements to make it better or more cost effective. I also searched previous forum questions and didn't see anything exactly like this.
Pic is attached on my general layout, but here is what I have come up with so far:
-12v 10w Solar panel, $20
-Charge Controller, $6
-20a Fuse, $0
-12v 5ah battery, $16
-LED dimming controller, $6
-12v Photocell, $3
-2835 LED 1 foot strip (cut from reel), $0
--I can provide links and further details to the components if needed, but they are all standard items that you can get on ebay or amazon
Total cost not including box housing is approx. $51 (seems like there should already be something like this available much cheaper, but I have searched a lot and can't find anything. I don't want one of those bulky solar LED lights and I want something that will stay on for at least 8 hours at night)
I did the research and 1 ft of the 2835 leds uses about 4 watts. Looking at all the formulas I found and the battery I intend to buy, 5ah, I calculated it would run the LEDs for 14 hours. 4/12 = .34 * 1000 = 340 Battery is 5000mah so 5000 / 340 = 14.7 hrs
Does this sound correct?
Next was determining the solar panel required. I came up with the 10w panel to have enough to charge the battery. 10w / 12v = .83 battery again is 5ah, so 5 / .83 = roughly 6 hours
Is this correct also?
The other items are components to complete the circuit, protect the battery and controller and have the ability to dim the lights if they are too bright.
I'm hoping I researched enough and did correct calculations and didn't miss anything. But please provide input, thoughts and anything I might have missed.