Solid state electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

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1answer
12 views

“Ultimate” Surge Protector with Solar Cells

I've had an idea that I was wondering if it would be possible. I came up with this idea when thinking about local computer backups. Companies such as IoSafe make hard drives which are water & ...
1
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2answers
25 views

Solar panels for a DC solar pool pump

Ok - total newbie question here. I'm trying to work out the size or number of solar panels required to run a DC pump for use as a solar heating system for a swimming pool. I've located what looks ...
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1answer
71 views

Photovoltaic cell used in calculators

I wish to make a PV powered (and battery backed) LCD clock. From what I understand my requirement may be served by a PV (photovoltaic) cell that provides similar or superior functionality to those ...
1
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2answers
53 views

Solar charging circuit question

Here we have a limiter circuit, pinned to 2.75V. There are 2 AAA batteries on the right and a 5V solar panel on the left. There is a sensor to determine when the circuit is on or off at P0.6 ...
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1answer
37 views

system design and power failure [on hold]

I installed a solar power system which included the following components: 6 x 145 watt panels 30A Mppt charge controller 2.4Kw pure sine wave inverter 4 x 12v 200Ah batteries The solar system ...
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0answers
20 views

Taking a 3V solar panel to charge a 3.8V LiPo Battery using step up converter

I am trying to make a self sustaining system that uses a solar panel and LiPo battery. The LiPo battery is a standard 3.8V battery with recommended charging at 4.2V. I have a solar panel that has ...
0
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1answer
16 views

SIM908 Li-Ion charging with 6V solar panel

So, I want to know if I can hook up a 6V 2 watt solar panel to the Vchg pin on a SIM908 gsm/gps module and trickle charge my 6Ah LiPo battery that way. A little background... So, I have completed ...
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2answers
38 views

How much power is generated from a typical solar-powered watch?

I have an ABC watch from Casio that is also an altimeter, barometer, and compass. I'm fascinated that all these features are powered by solar, which makes me curious: How much power is generated from ...
4
votes
1answer
96 views

How does this DC/DC converter work

I've got my hands on a bunch of old garden lights with solar panels, and of course I disassembled them and found that they use just one 1.5V accumulator cell to light up the LED. Just for ...
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0answers
39 views

Will the shading of Solar panels affects the output voltage?

Let's say many solar panels are connected in series and parallel. If a part of the solar array is shaded (due to a tree or a wall) it affects the output power of the cells. Given that it affects the ...
0
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1answer
65 views

How does battery charging work

I want to charge a 7.2V-2000mAh NiMH battery. I have many solar panels and a voltage regulator but I do not know what voltage is required to charge it. I've heard people say that as long as it is any ...
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2answers
369 views

How does a solar garden LED work with just 1 AAA battery?

I am converting some solar LED garden lights to emit infrared light for a raspberry pi critter camera to see what kind of wildlife trifles through my garbage at night. I just have one question. ...
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1answer
32 views

Replace a Solar Panel with a charging brick

I have a small solar lamp with a messed up solar panel. Now i want to replace the solar panel with a charging brick in order to charge my lamp. The question is what specification of charging brick ...
0
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1answer
46 views

Dropped Bluetooth Connection While Charging through Solar

  I am trying to charge a device (not of my own invention) with a solar panel. Sorry for the lack of name, but I’d like to keep my project my project. The panel is rated for 4.8v at 100 mA, and the ...
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1answer
39 views

Solar cells, current limited by smallest cell?

I've read on a bunch of different sites that: "You also do not want to mix different sized cells together because the current or AMPS of your solar panel will be limited by the smallest cell in the ...
0
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1answer
57 views

How to improve the current when the voltage is high in solar cell?

I am doing research on the fabrication of natural dye sensitized solar cells. The electrodes were imported . The dye was prepared from fruits and leaves using DMSO as solvent and KI and I2 in ...
3
votes
3answers
105 views

Is this the proper way to fuse a DC/DC Converter?

I am designing a solar power system for camping. I'll use a couple different DC/DC converters to provide DC voltages for the specific items I want to power. I want to properly fuse the various ...
0
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1answer
55 views

Solar Panel Cellphone Charger - Not Enough Current?

The Materials : 1) 3 X 1.5W 6V Monocrystalline panels @ 320mA 2) DC-DC Variable Voltage regulator 3) 3 X 1N4001 Diodes The Problem : - I have connected the panels (which give about 203 mA ...
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0answers
41 views

Designing a Solar Diorama with Motor and LED Indicator

I'm trying to design a Solar Diorama that uses Solar PV panels to power a small spinning motor and an LED indicator light that will show the current amount of power. Motor: 12 Volt DC, 2.1 Amps, 25.2 ...
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0answers
60 views

440AH 12V Lead Acid batteries discharging too quickly?

I've got 4 x 110AH 12V Orange Juice Trust brand Lead acid batteries connected in parallel to 1000 Watts of solar panels. The batteries are about 6 months old. According to the readings on my MPPT ...
0
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1answer
63 views

Running a load off a solar panel connected to 2x 12V batteries.

I am having trouble figuring out what relay I should be using for my solar panel set up. I have a solar panel running to a solar charge controller. I then have the controller running into a relay. ...
0
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1answer
78 views

lm2596 fixed 5 volts(usb) from 12v 10W solar panel

I have got a 10 Watt solar panel & a 10000 mha Battery bank. I plan to use the panel to charge the battery bank. I have a LM2596(variable configuration with pot), I plan to use it to charge my ...
0
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1answer
59 views

Questions concerning Solar MPPT tracker

I am building a solar MPPT tracker. First of all: what I understood from MPPT is that MPPT units transfer the maximum power available from a solar panel at that time to the load. This can be done by ...
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1answer
113 views

About a solar cell phone charger

I recently made a solar charger. The output energy of solar cell is 2 Watts. The voltage is around 20 volts. I used 7805 IC voltage regulator so i could get around 5V. I used a female USB and ...
0
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1answer
71 views

Am I misunderstanding the specs of this solar panel or electric motor?

I've been trying to figure this out, but the answers I've come up with thus far have been counter-intuitive. The solar panel's specs are as follows: ...
0
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1answer
225 views

Solar panel and 120mm Computer fan

Just before I start description my question, I would like to let you know that I am new at this. I am working on a solar air heater for one of my window. I've been researching and reading up on a lot ...
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2answers
121 views

Determining a solar panel, is this correct?

I want to power this device, which is a tplink wr703n. It is a small travel router. When I looked at the specs, it says that it uses 100mA for wifi, and 85mA to run it. This is incredibly low. Now, ...
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2answers
90 views

Solar inverter with mains backup [closed]

I'm looking for a way to partially power an applicance (a fridge freezer for argument's sake) using solar/renewable energy. I don't expect the couple of hundred watts of solar power to be sufficient ...
0
votes
1answer
103 views

Is it okay to put a solar cell and battery into resin?

I was thinking about making a simple circuit with LED, solar cell and battery and put it in resin mold to make it weather proof. I wonder is there anything wrong (chemically) with putting a battery ...
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2answers
101 views

Issue charging a 12V battery using solar charger

I bought a 12V solar charger for vehicle batteries, because I am usually using wall chargers and I wanted to give green technology a try. When I connect the solar charger to my battery, it shows 10V, ...
0
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1answer
69 views

Power supply for Raspberry Pi

Before you tell me that the question has already been asked, only similar things have been asked. I need to power a Raspberry Pi with some electrical equipment attached to it. The Pi needs to run ...
0
votes
1answer
88 views

Why does my DIY “solar panel circuit” show battery voltage and not solar panel voltage? [duplicate]

I have six solar panels but each are different from one another. The first is 4.5V. The second is 6V. And the last four are all equal up to 6V. It all adds up to 16.5V in series or on a good sunny ...
0
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1answer
55 views

Battery recharging via solar panel

I am trying to use rechargeable batteries. If I recharge two of the below batteries via the solar panel below, how many hours will it need to recharge to 100%? Likewise, what if I recharge four ...
1
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1answer
83 views

Will this be able to run 24/7? [closed]

I'm trying to find out if I can run an appliance of mine can off the grid, completely on solar power and a battery. The appliance uses 4.91 amps and uses 110 volts on the power cord. The solar panel ...
0
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2answers
205 views

DIY 5v Solar Panels

In a nutshell : What is a good way to power a 5V project with one-two 0.5 V solar cells? The motivation is as follows: My project needs about 2.5-5 Watts from the solar panel. Also, this project ...
0
votes
2answers
82 views

Solar panel system with as minimal reliance on the grid

I am not sure if this is the best place to ask, but I am trying to make a solar panel system which will charge batteries with excess energy and will be connected to the mains (i am going to try the ...
2
votes
2answers
292 views

Solar power monitoring with Raspberry Pi

I want to measure the current and voltage from a set of small solar panels (about 10V and 100mA but not settled yet) using a Raspberry Pi. There will be between 4 and 6 panels. This project will ...
0
votes
4answers
380 views

Solar panel and dc motor

I want to run a 130V dc motor 2hp. I have 6 solar panel 120V dc out. I connected them in series to the motor directly and it runs, but when I check the voltage at the terminal when it is running it ...
1
vote
1answer
38 views

Using current measurments for smart charging a battery

I've been doing some reading on smart charging a battery, and I hope to create a system that can charge batteries with the use of a solar panel. Most of the reading I've encoutered utilises the ...
8
votes
8answers
449 views

Neophyte question about AC vs. DC (especially for powering a home)

Here in the United States the electricity grid is AC. I have heard that AC allows transmission of power at greater distances with less loss. However, with the advent of solar panels, it would seem ...
1
vote
1answer
110 views

Handling overvoltage in 12 volt system

I have a small 12v system for my cottage with a solar panel, charge regulator and a battery. Mostly used to charge phones and to drive a few lights. Now I'm planning to connect a inductive load ...
3
votes
4answers
396 views

What are some of the segmented displays with the lowest power consumption?

I have to select a low-power display for a solar-powered digital clock. I have looked into numerous technologies, including e-ink. However, I was still unable to compare between them due to the lack ...
0
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0answers
40 views

Automatically changing currently used and charged deep cycle batteries, any problem?

I don't know the internals of commercial solar deep cycle battery chargers, though mostly what I see in home made ones is that a regulator circuit is connected to battery, and when you want to use the ...
0
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0answers
61 views

Disconnect PV string from inverter and connect to charge controller on grid failure

I'm designing a PV system where a string of panels is connected to a normal grid tied inverter, but when the grid fails, I want to switch the string to feed a charge controller that will top off a ...
1
vote
2answers
57 views

Solar array not charging batteries

I just installed a solar array to charge an existing battery system. Even with full sun my charge controller is not receiving enough voltage to go into charge mode. All the system info is below. ...
0
votes
2answers
128 views

What wattage solar panel required for AC 1000 watts

If my house load is 1000 Watts AC/220V, then 1000 Watts DC/12V solar panels is not enough. What wattage solar panel would be required for AC 1000 watts?
0
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0answers
47 views

Solar charger under rapidly varying conditions/impendance

My solar equipment consists of: Solar panel capable of: 20V Peak / 3.6A Peak Li-Ion Battery pack: 8.7V, 9Ah, (2S3P setup) My solar charger setup consists of: 5A DC-DC BUCK converter (XL4015) ...
1
vote
3answers
617 views

How many Watts DC are equivalent to 1,000 Watts AC? [duplicate]

How many Watts DC are equivalent to 1,000 Watts AC? For instance, my load in AC is 1,000 Watts 220V. Then, how much DC watts would an equivalent load dissipate in 12V or 24V DC system?
1
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2answers
128 views

How can I seamlessly switch power supplies?

Quick question, I am not very good with my electrical circuit terminology so I'm not sure what to call what I'm trying to do. When I try to Google "How to switch power supplies" I got inundated with ...
0
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0answers
92 views

Designing an Automated Switching System for Solar Battery Charging Station

I am trying to design an Automated Switching System for my Solar Battery Charging Station project. In the project a 48V battery rail is charged with two 200W panels connected in series through a PWM ...