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

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1answer
13 views

solar panel 160w inverter wattage

I'd like to start with a couple DIY experiences into solar panels. My question is regarding the inverter wattage. I mean, if I pretend to make a cheap solar panel with a maximum possible wattage of ...
0
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1answer
40 views

Using Electric Motor/Generator Instead of Inverter to Deliver AC Mains from Batteries / Solar

I am exploring/researching Solar PV systems and the possibility of setting up a solar installation company. DC/AC inverters are very expensive and I am trying to find a cheaper solution. Question: ...
5
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1answer
94 views

What are these white spots on my solar panel

I purchased a 5W solar panel from Sparkfun, and after using it outside for about a week, these large white spots started showing up. Here's a closeup: The solar panel is not being back-fed thanks ...
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2answers
45 views

Which motor is suitable for a sun tracker one axis?

Which motor is suitable for a sun tracker one axis and two axes and one of the specifications of this motor has high torque?
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0answers
47 views

Solar powered cooling compressor

I have a question on solar panels (solar cell/solar battery), I like to run a cooling compressor. I only need my cooling compressor to work when it is a sunny day. I will not have any power storing ...
0
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0answers
70 views

How can I perform power source switching using a P-channel MOSFET?

I am trying to build a power source switching circuit for an Arduino-based GPS tracking device/application. One power source is a solar-cell (rated at 1.5W and 6V) and the other is a 3.7V lithium-ion ...
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0answers
38 views

New Solar Panels disconnected and not being used [on hold]

We have a solar installation on a rooftop. We needed more panels - so we used a crane to lift the panels on the roof. We didn't finish the install - so some of the panels are just laying on the roof ...
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0answers
52 views

Why is the output of my 5V step-up voltage regulator the same as the input?

I'm trying to step-up voltage from a solar cell. Using a lamp, the cell outputs a constant 3.8V. The output I'm getting from the voltage regulator is about 1.5V. Why is this? I have a 1000uF capacitor ...
0
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1answer
38 views

Solar battery charging, solar IV curve

I am thinking of making a solar battery charger for some NiMH batteries but am a bit confused as to how make sense of a solar panels IV curve in the application of battery charging. 1) For a direct ...
0
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1answer
88 views

12 Volt Solar Air conditionair

I saw a post on YouTube where somebody was able to make ice with a 90 watt solar panel, two 12 volt batteries, an ice maker (800 watt spikes) and 1000 watt DC-AC inverter. ...
0
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3answers
87 views

Producing electricity from heat on a small scale?

Using a small solar panel like in the following picture we can produce around 0.935W of power with a peak voltage of 5.5V and current of 170mA under good sunny conditions Does a similar type of ...
0
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1answer
54 views

Safe LiPo Charging

When charging a lipo: Is there a max current you should recharge at? Does the protection circuit on the lipo correct for the amount of current that should be going into the battery? I'm looking at ...
0
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1answer
48 views

solar panel tilt depending on latitude

I'm attempting to calculate optimum solar panel tilts, and the best way to do this seems to be by latitude. However all i can find is calculators, i wish to be able to calculate this myself, is there ...
3
votes
1answer
57 views

Multiple charge controllers on the same solar panel

I have two 12v lead acid batteries on my boat. One at the front for the trolling motor (~80 AH) and 2 smaller batteries in parallel at the rear for electronics (~30-35 AH combined). I want to put a ...
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votes
2answers
53 views

Can I charge two small batteries of different voltage using one solar panel and two diodes?

If I use diodes to direct power to each of two small batteries (old NiMH laptop packs), will both charge properly from a single solar panel at the same time if one pack is 11 Volt (9 NiMH cells in ...
0
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2answers
51 views

Solar Panel + Controller + Diode to float LiPos

I have a few solar panels I wanted to play around with and charge some 18650s till I get a little more comfortable that I won’t blow something up. My main goal is to understand how to charge ...
1
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1answer
79 views

How to calculate solar panel setup?

I have an equipment which draws 550W at a constant level, no peaks. I want to power this unit with solar cells only during the day when there is light using a simple car battery. Because I don't want ...
4
votes
1answer
48 views

Increasing 12V Rail current on power supply for mobile computing

I am building a miro-itx slimline pc for my mobile home that is powered by solar. I have selected a GPU with a rated TDP of 120 Watts and a CPU with a TDP of 53 Watts.I purchased a DC-DC buck ...
1
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1answer
55 views

Solar cell electrical model from datasheet

I would like to build an electrical model for a solar cell based on its datasheet specifications. As an example, I retrieved one from Digi-Key: ...
0
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0answers
9 views

Question about Solar Panel and Lithium charging board

I have a 6V 4.5W solar panel which I would like to use to charge my Lithium-Ion batteries. The battery chargin board accepts 4.5-5.5V. Would it still be safe to use it with 6V? If not, should I just ...
0
votes
1answer
32 views

PV cell output calculation, when a charging limiter is involved

I need to the charging rate of a battery connected to a 20w PV panel. Due to the regulator on the board though the maximum rate the battery can be charge at is 1A, 12V , due to how this is setup, ...
0
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0answers
35 views

Does connecting different solar panels in parallel affect total current? Are there any dangers? [duplicate]

I've posted this question on another forum as well but got no usable replies. I've done a lot of research but only found info about batteries in parallel, which says higher voltage will charge lower ...
1
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0answers
67 views

Can AC/DC conversion losses from solar panels be avoided with a Tesla Powerwall?

(background: I'm just playing with numbers, trying to estimate how many solar panels would be needed to fully supply the energy for a home and 2 Tesla cars) I've been reading up on solar panels and ...
0
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2answers
52 views

Arduino remove power if battery voltage is too low

I want to power my Arduino using a Lithium-Ion battery. When the battery is below 3.0V, the power to the Arduino should be disconnected, and when it rises high enough again is should be reconnected ...
2
votes
2answers
102 views

Preventing Arduino from getting lightning strikes and protecting it

I want to use an Arduino as a weather station and I want to put it high up in a tree. It should be independent and powered by solar panels. This is where the problem starts. Lightning strikes occur ...
0
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2answers
54 views

How to add solar DC output, Wind DC output and Fuel cell DC output to create a DC bus

How to add solar DC output, Wind DC output and Fuel cell DC output to create a DC bus. My doubt is, Is it possible to connect the outputs of different type of power sources(considering the DC voltage ...
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0answers
67 views

Building a solar powered USB charger

Can some one please help me ! I'm new to electronics and I have been building my own basic ones, but I have decided to step it up a little and design this. Could you tell me if it would work ? If ...
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votes
1answer
51 views

What tests, if any, can I execute to determine whether a PV panel has deteriorated?

So I'm possessed of an aged Photo-voltaic panel (around 15years) that came with a night-lamp. When placed in the sun here (21.17, 79.09) - on a sunny day the multimeter shows me as much as 11V from ...
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votes
3answers
76 views

Electricity needed to maintain power for camera [closed]

I am not an electrical engineer by any means and do not even know the terms I should use to ask this question but basically I am trying to determine which solar panel I can use to power my camera. ...
0
votes
1answer
57 views

Charge Lithium-Ion batteries using a solar panel in parallel

I want to charge some Lithium-Ion batteries using a solar panel with this loading circuit found on ebay here. Apparently it works fine with just one Li-Ion battery, but I would like to extend the ...
0
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0answers
36 views

Using Lithium-Ion batteries for arduino

I want to know a couple of question regarding my upcoming project of powering a arduino using solar power. I want to use 2 5.5V 2.5W solar panels which charge Lithium Ion batteries. On this site here ...
0
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1answer
68 views

Build a solar panel nimh charger

Today I found this tutorial on how to build a battery/solar power supply for an arduino here. The tutorial explains on how to use NIMH or Lithium-Ion batteries for this. Step 4 explains how to use ...
2
votes
1answer
82 views

Solar powered single cell LiFePo4 charger circuit

As a follow-up to this question I've come up with this schematic for a solar powered battery charger: Subcircuits, from left to right: Solar cell (just a voltage source), 12V, 10W. Buck regulator ...
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0answers
37 views

Combining multiple solar chargers to increase output current?

Im looking to power an outdoor solar project that needs to power a 12v led light bulb @ 750 ma. I have a 12v step up regulator already, and was wondering if I could combine two of these inexpensive ...
0
votes
3answers
45 views

Hardware for testing MPPT algorithms

I have been working on an MPPT algorithm and I simulated on MATLAB , now I wish to test it practically.Can anyone suggest hardware or programmable MPPT charge controllers to which I can apply my ...
1
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1answer
114 views

Automatic Solar light far too dim, help with increasing brightness

simulate this circuit – Schematic created using CircuitLab I've built a simple circuit that uses a transistor to switch from charging 2AA batteries during the day to discharging the ...
2
votes
1answer
80 views

Solar powered charger circuit for a single LiFe cell

I'm looking for a solar powered charger circuit for a single LiFePo cell. The load is a low power MCU with some sensors attached, and when sufficient solar power is available, it should be used to ...
-1
votes
2answers
66 views

how long charge li- ion battery [closed]

I have \$3.7V\$ Li-ion battery \$3800mAh\$ and Solar panel \$U=5.5V, I_{max}=290mA\$. Battery will supply arduino with sensors taking \$100mA\$ current. How long will it take to charge the battery ...
0
votes
0answers
46 views

Handmade usb charger

I am a mechanical engineer and I don't have so many knowledge on electronics. I tried to make a solar charger . I had a 12v12ah battery,a solar panel 20w, a battery charger and a dc-dc converter ...
1
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3answers
110 views

How to power a 12V fan simply using a PV panel?

I am an electronics noob and I'd like to create some air circulation through my friends cellar using a salvaged 12V 0,8A brushless DC computer fan and a suitable PV panel. I have searched Ebay for 12V ...
0
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0answers
52 views

Could somebody check this circuit/components and size the resistors?

simulate this circuit – Schematic created using CircuitLab Could somebody please check this circuit/components and size the resistors for me? I'm trying to produce a variation of this: ...
0
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2answers
94 views

Trouble with Transistor Switch (2n3906)

simulate this circuit – Schematic created using CircuitLab I'm replicating a circuit found on evilmadscientist.com: the "detecting darkness" ...
1
vote
1answer
67 views

How to estimate solar panel output as a function of solar radiation

Apparently, according to EarthScience.SE, the measurement of how "bright" a given day is, is measured in units of kWh/m^2, known simply as "solar radiation". ...
0
votes
1answer
22 views

Sizing Photovolatic cells based on solar load

I'm designing a Photovolatic system to power up a certain electrical load (around 1000 Watts). I've just finished my solar calculations determining the optimum tilt angle and the optimum surface ...
0
votes
1answer
60 views

Need advice on my simple solar powered lighting system

I'm building a simple circuit in which a solar panel will charge a 12 V battery during the day and then switch over to battery power during at night to light up a few bulbs. I'm using an LDR which ...
0
votes
0answers
31 views

charge controller not disconnecting at full

When testing batteries and charge controllers I stumbled into something, this is what I found: 12V 100A battery charged using solar system with a charge controller in between, at 13.4V or ...
2
votes
1answer
144 views

Is the intensity of light shone onto a solar panel proportional to its power output?

Is there a linear relationship between the two? I ask because I'm investigating the effect of a different variable on the power output of a solar panel, and intensity is meant to be one of my control ...
1
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2answers
113 views

Capacitor Configuration

The block diagram below is for a simple use of a solar array in conjunction with a battery, in a battery tied bus format. The diagram is simple and straightforward excepting the capacitor ...
1
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1answer
36 views

Two voltage rails from one photovoltaic system

I'm working on designing a photovoltaic well water pumping system. I will have two 12V 120W PV panels connected in series, for a 24V 240W output (during full sunlight). Is it possible to connect a ...
-1
votes
1answer
60 views

Simultaneous operation of inverter and diesel generator in a solar system

I have a problem at one of my on-grid solar system project. There is a problem which lets the solar inverter on, when the grid is off and the diesel generator is on. As you know that, the solar ...