Questions tagged [solar-cell]
Solid state electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
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1answer
30 views
12 V 3.8 A water pump to 12 V 625CCA battery
Wanting to use car battery to power pump. Pump says it's 12 V 3.8 A, uses a 8 A fuse. Trying to sort out possible solar input needed to run pump but the numbers don't make sense. What size solar panel ...
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1answer
23 views
Designing an effective extensible solar cell + car battery setup
I've got a cabin that I visit on weekends and because I need to charge my computer and tools there, I decided to bring an old car battery and bought a solar panel to charge it. Right now I use a cheap ...
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1answer
31 views
Solar variation tolerance for a solar panel
How to estimate average variation of input solar radiation that would be tolerable for a given solar panel? On what parameters will it depend?
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30 views
Solar panel Efficiency Calculation
To find ideal conversion efficiency of solar panel, one must know incident radiation flux.
[Max wattage/(flux(W/m sq)*area of panel] x100.
At most of the places the flux is measured or calculated ...
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37 views
12v 10w solar panel to charge 10ah battery bank [closed]
I'm trying to charge a 10000 mAh power bank (li-ion battery bank) from a 12 V 10 W solar panel. The peak voltage according to the panels ratings is 23 V, but when I checked it is about 20 V To supply ...
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17 views
Bypassing solar charge controller using trickle charge voltage?
In an effort to simplify a small solar system and to keep the cost down, I am wondering what (if any) drawbacks there are to having the Vmp (voltage at maximum power) in a solar panel setup, at 12.5% ...
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30 views
Parallel DC sources with varying voltages
I have different DC sources which i want to hook up to a 24v battery pack.
- Solar controller output
- AC/DC charger
- truck alternator
Can i connect these in parallel? I've been told that because ...
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0answers
23 views
Dual axis solar tracker design
I am developing a homebrew dual axis solar tracker with 9 solar panels and I am trying to figure out the right set of electrical components for the tracking control
I would like to control two linear ...
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2answers
89 views
How can I use an LED driver (QX5252) to light up 3 different color LEDs (Green, Yellow, Purple)?
I am trying to light up 6 LEDs with the common garden light circuit (2v Solar panel and 1.2V battery). The problem is that I want to light up 2 yellow LEDs, 2 green LEDs, and 2 purple LEDs ...
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1answer
48 views
What is this solar power RC circuit doing?
I am a CSE student working on a project.
We are using a solar powered microcontroller. The solar panel's power goes through a fuse and an RC circuit with a varistor to the charging system.
What ...
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2answers
33 views
How do 24v or 48v solar/battery inverters provide power for houses that rely on 110v?
I've been learning about solar systems and I keep seeing that the systems feed power in to batteries, which is then fed in to the house via an inverter, typically 24v or 48v.
However, most houshold ...
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18 views
Solar Power Panels How to DIY Books
Are they any books you can recommend for learning about Solar Power Panels and how to connect them? I want to connect - 2-3 180 Watts Solar Panels as an experiment to reduce the electricity ...
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1answer
66 views
DC converters for solar cell
As we know, the voltage level of a solar cell is lower than what a rechargable battery needs, and thus a DC converter is placed in between.( With feedback control for optimum V-I curve)
This just ...
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1answer
30 views
How can I use an IC family or adapter to switch automatically from solar cell to batteries & reverse?
simulate this circuit – Schematic created using CircuitLab
How can I use an IC family or adapter to switch automatically from solar cell to batteries & reverse ?
if no load => solar cells ...
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1answer
44 views
Connecting a Solar Panel and Power Supply in parallel, in order to power up a load
I am using a Solar Module to charge a LiPo battery. The current supplied by the solar module goes into a battery charger IC and from there to the battery.
This works fine.
Now I want to add an ...
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1answer
30 views
Necessary voltage to charge NiMH using Solar Panel
I'm trying to understand which voltage I need to charge my NiMH batteries so I can purchase the components to do this.
Actually I have 2x AA Ni-MH 1.2 V 1900 mAh and 4x Solar Panel 2 V ...
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2answers
40 views
Powering 3 identical laptops using a solar panel
I have 3 identical laptops rated at 45W and 20V. The combined wattage of all 3 is 135W. I want to charge these laptops via a solar cell. Do I go for a solar cell rated 135W 20V or one rated 45W 20V?
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1answer
35 views
Battery sizing for motor?
I have a question regarding battery sizing and solar panel sizing ,I am not from an engineering background that's why i might need some help with this.
I want to run a 24vdc gear motor 180W 11.5 amps ...
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1answer
58 views
How to charge 4 NiMh AA batteries with solar cell
I have a nice 6V solar panel and I was thinking to use it to recharge a 4xAA NiMh battery pack (nominal voltage 4.8).
Is it enough to put a series diode (0.7v) to drop the voltage, or do I have to ...
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2answers
74 views
Mini solar panel not working
I have a very basic though unsolvable issue so far, I bought a (shitty) mini solar panel, outputting up to 6V and 1W (166mA), and I cant get it to work with the equipment I have or even measure any ...
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2answers
38 views
Solar panel with broken glass produces designated Voc but far less Isc Amperage
I have quite several 72 cells solar panels with cracked glass taking punch during the handling. The designated Voc is a little over 45V and almost all of the cracked solar panels (20pcs) generates Voc ...
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3answers
157 views
Best battery to power a Microcontroller outdoors [closed]
I live in a place where the temperatures can range from -20°C to +40°C in different seasons. I need to power a small micro-controller that uses very low energy with a solar panel and a battery. Which ...
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37 views
PV Device, IV chart approximations
I have this PV device and IV values shown. I am not sure if my thinking is correct for the following problems.
Over what range of voltages can I approximate a ideal current? I thought that it would ...
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1answer
38 views
Solar cell failure
I am a student in high school, and I am working on a project. I got a Solarbotics Marble Machine, and I could not get the solar cell to transfer power to the motor. I talked to my Robotics teacher and ...
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1answer
34 views
Li-Ion Battery Solar powered circuit
I am currently working on a Solar powered project but I am having a hard time making it work:
I have a PCB with an Arduino and a sensor, this circuit consumes 250mA for around 2 seconds every 10 ...
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2answers
171 views
How to charge lithium ion battery in series and parallel?
I want to use TP4056 in my solar power bank project to charge a lithium-ion battery (3.7 V, 2000mAh each one), but I don't know how to use it when I want to charge more than one battery.
Is those ...
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0answers
67 views
New DIY project try to understand MPPT [closed]
I got used battery MODULE with the next specs
"40V 18.4AH 736WH build of ninety six A123-26650 LITHIUM LIFEPO4 cell "
Cell specs:
Nominal Capacity: 2300mAh
Voltage(nominal,V): 3.3V
Internal ...
-1
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1answer
100 views
What motor do i use to rotate a tumbler at low RPM and high torque which run by a battery charged by solar?
I am gonna run the motor to turn a tumbler of 50-85 kg @ 5 rpm MAX.
The motor will be powered by a battery which will be charged by solar.
So should i go for a DC or AC motor? Single phase or 3 ...
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0answers
34 views
What are the technical challenges in developing a battery-less off-grid solar PV system (solar panel + DC-DC converter with MPPT + Inverter + Load)? [duplicate]
I am trying to develop a battery-less off-grid power system. I know the obvious reasons for not deploying such a system; no backup at night etc.
Also, I understand that current MPPT charge controller ...
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0answers
33 views
Transistor for high power application in photovoltaics
I have the following situation, where there is a need for a switch with low conduction losses and controllable variable resistance, to cut-off photovoltaic (PV) panel.
The PV panel is in series with ...
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1answer
62 views
what size battery storage is needed to provide 10A at 115v for 5 continuous hours
I have a two part question:
What size battery storage is needed to provide 10A at 115v (I meant 115v AC) for 5 continuous hours?
what size solar array (assuming proper alignment, etc.) would be ...
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4answers
171 views
How do MPPT charge controllers curtail the power if the load is less than the solar generation?
I am trying to understand how MPPT charge controllers work when the load is less than the solar power generation. Let's assume an off-grid system with battery backup and no dump load. In my ...
2
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1answer
73 views
Apply voltage to a solar cell
I was thinking about a power circuit in which the power can be supplied on the same rail through a solar panel or an ac adapter. I automatically thought to add diodes in series to form an OR gate, so ...
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1answer
39 views
3.5v solar panel Li-Ion battery charger
I am planning on recycling some cheap low voltage solar panels that came out of a gardening light. I have two of these modules, that soldered in series provide a voltage of around 3.5v (on direct ...
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0answers
65 views
Charging 12 V battery from solar panel
I just bought a rav power 24 w portable solar charger. It perfectly charges my phone, power bank etc. I intend to do a little bit of hack and use it charge my 12 volt battery and motorola battery. My ...
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2answers
60 views
Solar powered LED via capacitor?
I am building a large garden peice in wood, which I hope to illumine from within, powered by a small, (perhaps 90x65, 6v, 0.6w 100mA as space is limited) solar panel.
After testing, I noticed that ...
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1answer
40 views
Dual axis solar tracker with singlr LDR
I'm working on dual axis solar tracker project, but the task I was given was to make a solar tracker work with a single LDR (Light Dependent Resistor).
The LDR would be placed in a pipe which is ...
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1answer
77 views
How does voltage output of a solar cell increase/decrease?
I am confused on how voltage and current work in a solar cell. I know that current is affected by the amount of sunlight the cell receives from the sun, and the voltage of the cell is based on the ...
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1answer
92 views
How much capacitance/joule/watt is needed on average household' energy storage system with supercapacitor?
I am on the process of making assumption how much capacitance/joule/watt is required on average supercapacitor as household' energy storage system. I plan the design for energy hub to be charged by ...
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1answer
50 views
Wrong output on solar inverter
I have started working on proteus two days ago for my college project and I’m having some problem in the solar inverter.
Diagram which I refered for making this inverter:
And I tried to recreate ...
2
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1answer
88 views
solar panels: multiple roof surfaces on one inverter string?
Notice below part of electric scheme as designed by solar company:
On the left you can see inverter used - Delta Solivia 7.6 TL
(see Operation and Installation Manual for details) which supports up ...
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0answers
11 views
Connection of Solar Array in Series in Matlab Simulink environment
I need to simulate a solar photovoltaic feed induction motor system. I need to connect 12 solar array/module connected in series to increase open circuit voltage. I have modeled a solar array of 36 ...
2
votes
1answer
173 views
How to efficiently charge 48V battery-motor system with solar panels
I'm wondering how to efficiently charge and use the following system with standard 18V solar panels:
48V lead-acid battery
1kW electric motor
To charge the battery with either PWM or MPPT, the solar ...
0
votes
1answer
27 views
How to do high switched current from small solar
I am working on a small, solar-powered application that makes use of RF and a few higher-power sensors. Those will only be on for a fraction of the time, but might consume 1A-2A at 3.3V.
The ...
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3answers
42 views
Will lower voltage power source supplement/charge higher voltage power source?
I would like to add a 4.5V 1.5W solar panel to supplement an existing electrical setup in my vehicle. My current setup is an Arduino and other electronics wired up to an "add a fuse" in the car fuse ...
2
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2answers
230 views
Chicken coop door opener circuit
I'm designing a circuit that will open a chicken coop when the sun comes up. I've attached a bungee cord to the door which opens the door when a pin is released. This pin is released by a car door ...
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1answer
32 views
What kind of setup can take portable solar USB power & charge a AA battery charger that is usually designed to plug into a wall? [closed]
I have a portable solar panel that generates 21w of power, seen here: enter link description here . It has a USB connection wired into it that will accept a USB cord to charge small devices via USB. ...
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1answer
102 views
Solar Power with Battery Backup Circuit
As a disclaimer, I'm a novice when it comes to electrical engineering and I am looking for assistance in order to complete my endeavor. I have spent the past few weeks teaching myself concepts and ...
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1answer
73 views
Slow-start lead-acid charge - good or bad?
I have a 300Ah battery which is near-dead (Abused in the past, around 5 years old) and want to replace it with 4-6 new 100Ah.
The current method of charging is with a 30A MPPT solar controller.
As ...
0
votes
1answer
76 views
Use solar cell to power and communicate with chip in IR
I have a slightly movable (torsional (freely for infinite degrees around the z-axis) and translational (+- 40mm in the xy plane)) microcontroller in communication with a fixed one. I'd like to use it ...
