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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Solar not producing 24V all the time [duplicate]
We live in a moderately sunny place. We do get some cloudy days frequently. I have seen the output to go above 24V(like25V) on a fully sunny day middle of the day which means lots of days the solar ...
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Solar panel does not charge after lipo battery is low
I am trying to run arduino with solar panel, I have a project for farming so electrcity is problem. I need to use a independent energy.
I bought Solar Power Manager 5V SKU DFR0559 and a 2000 mAh LiPo ...
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How do appliances prefer to use my solar power from a grid-tie inverter over the power from the grid?
I have a grid-connected solar inverter. In the swtich board the incoming wire from the street, the incoming wire from the inverter and the outgoing wire to the loads in my house are all connected ...
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How does a grid-tie solar power inverter know when the mains power has failed?
Solar power inverters that send excess solar power back to the grid are (usually) required to shut down if the grid power fails. (This is to protect people working on the power lines.)
The inverter ...
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Photovoltaic system that charges a Li-Po battery while supplying a 1.4V load
I am a mechanical engineering student and not that familiar with electronics.
I am currently trying to establish a photovoltaic (PV) system that can charge a 3.7V 100mAh lipo battery and deliver ...
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connecting a solar panel to battery
I have a 5V 1000mA solar cell which I have connected to two 18650 3.7V 3400mA batteries in parallel. The solar positive comes in through a 1N4007 diode (cathode toward battery)and then a latching ...
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The purpose of solar MPPT? [duplicate]
I already know what a MPPT is supposed to do. It's basically a buck/boost converter connected to a solar panel that finds the ideal power output by changing (boosting or lowering) the voltage of the ...
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What is the correct way to block current going into a solar panel from battery
I have a 6v 750mA solar cell that I am using to charge a couple of panasonic 18650 3400mAh 3.7v batteries. I have the positive from the solar going through a 1N4007 diode (cathode side toward the ...
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Where do you put the inverter? Near the battery or near the load?
Where do you put the inverter to minimize power loss on a stand alone solar setup?
I'm using DC 12V as power on devices but I notice resistance on wires when running long lengths. AC is better on long ...
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Selecting proper bypass diodes for solar panel
On my sailing boat we've installed four solar panels (two times Vmp = 17.64V, Voc = 21.6V, Imp = 5.67A, Ioc = 6.07A, Pmax = 100W and two times the same but 75W), which we connect all in parallel, then ...
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Solar Panel & Temperature coefficient of Voc Seems Exceedingly Low
I am reading over a solar panel data sheet and I'm having issue converting the Temperature coefficient of Voc as written because it seems exceedingly low to me. I fully understand the panel datasheet ...
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Is grounding 12v 100W solar panel to a lightning rod necessary?
My plan is to put a solar panel on my greenhouse to run a 150 W 12 V heater for 20 minutes max and turned on depending the low temperature is detected by a sensor, automation controller and a grow ...
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DIY charger: solar panels in series or in parallel?
I am working on a DIY project where I am thinking of using a small solar panel to charge my iPhone.
I know iPhone chargers usually are 5 W, 5V at 1 A.
I can see two small, portable, and easily ...
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Charging mobile with solar panel Issue
I want to charge mobiles using a solar panel.
Most phones would charge well with 5V 1A/1.5A.
My panel specifications are as follows-
Key points:
Maximum power 10Wp (peak wattage)
Voltage at maximum ...
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Battery charging with boost converter topology
I'm designing a circuit for battery charging, which will make use of boost converter topology. I have determined the input/output voltage and current parameters for the circuit. If I put a resistor at ...
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Dual 12 V battery setup - wiring, grounding and busbars
I am installing a second 12 V battery into my van to run eletronic devices. The second battery is a bank of two LiFePO4 12 V, 120 Ah cells connected in parallel.
My three questions are surrounding the ...
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Solar Cell Photocurrent at Zero Voltage?
Having experience in shaping custom solar cells, a colleague made me question my basic understanding of photovoltaic operation recently. He pointed out that a so-called Short Circuit Current in a ...
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Need help with maximum safe load on a C10 battery in a Solar power system
I have a solar system with 20Amps/12v MPPT, 150ah/12v C10 battery, 500watts/24v panel and 1000va inverter. I have a few questions.
Can I use a 750w cloth iron on this for 30 minutes? As per my ...
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STM32 ADC read methods for high voltages
I want to read input voltage from a solar array for my circuit. That's not a big deal if the voltage is up to 3.6V. The problem is that I am expecting maximum of 15V and obviously I won't be able to ...
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How do I match a battery pack voltage to my solar panels?
We're building an autonomous boat which should be powered by solar panels. We want to put two 100W solar panels on it. Most panels I see are 18V and for redundancy we want to link them in parallel. ...
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Transistor as switch with solar panel charging
I'm designing a circuit that charges a battery with solar power. Im using the TP4056 for this.
My question is the following. I want to use a transistor as switch to cut off the power if the battery is ...
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Delayed RESET to MCU pin
Using the following schematic, I am charging a supercap (3.3F, 3V) via a solar panel and would like to keep a downstream microcontroller in reset mode until the supercap has charged a bit.
To do so, I ...
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Powering a power bank with solar panels
Excuse my ignorance in electrical engineering, I am not familiar with the field.
I am trying to power a power bank using solar power. I have settled on the following components:
4x 18V 2.5W Mini ...
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Should I connect 4 solar panels (3.6v 900/1A) in parallel, in series or independently to the PCB to gain better power outcome?
Good morning,
I have 4 solar panels with 3.6v 900/1A each, ~3.4W.
I would like to connect them using a PCB to be able to charge an internal lipo battery, a smartphone or other devices.
My question is: ...
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Can a solar cell based lux meter produce useful readings for ultraviolet light?
I was reading the question Safety Guidelines for Ultraviolet LEDs? about ultraviolet exposure, and realized that a solar cell can probably detect this, since solar cells can also detect visible light, ...
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Strange oscillations in Simulink for a buck-boost converter connected to a solar panel
I am building a model of a solar power system. In it, I connect a string of solar cells to a buck-boost converter. I use Simulink and Simscape Electrical to perform simulations. I am encountering an ...
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What happens when you push two different current and voltage in same wire? [closed]
Let's consider I am running a motor with a battery and motor consumes 15.8V 1A (also assume it is constant and does not vary.)
Now I add a solar panel to its power source which produces 5.20V and 0....
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How much variability is there in a solar panel?
If I have two solar panels with identical specifications and they are working under the same condition, how much difference in power output would usually be observed?
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PV panel -a current source or voltage source?
I'm reading about PV behaviour and am confused on whether a PV panel/cell would be considered to be a voltage source or current source or both or neither (from the characteristic IV curve). The IV ...
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how to create electronic switch cut off PV from MPPT charger when no battery connection
MPPT chargers are sensitive if PV is connected without battery connection. MPPT will be destroyed.
So I want put electronic switch on MPPT PV input in a relation with battery voltage
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No voltage on ...
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Power supply voltage clamp
For a solar powered project I'm using a 5V solar panel to keep a 3.7V Li Ion battery topped up.
The Li Ion charge regulator IC is an MCP73831T and can handle a Vin from 3.75V to 6V. This is fine for ...
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How to convert battery powered roller blinds to be solar powered?
I have some battery powered roller shades that I'd like to convert to using rechargeable batteries using a solar panel as the charger. My blinds are Norman Pro-Lift 25 CE blinds. They run off a long ...
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What is the main reason why solar inverters fail?
As I understand electrolytic capacitors fail eventually after some years of use. Is there something else that breaks down too? Because changing inverter just because its capacitors are gone is really ...
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Confusion regarding the operating voltage of a solar cell
The equivalent circuit of a solar cell:
The operating voltage of the solar cell is approximately 0.5 V.
What does this voltage represent,exactly?
Is it the voltage of the cell (I-V relation of solar ...
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Cleanest way to solar-power a string of outdoor bistro lights
I'm trying to hang some bistro lights on my balcony — specifically, the SVARTRÅ outdoor bistro lights from IKEA.
There's just one issue: the balcony has no power outlets, and I'm not going to snake a ...
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Connecting CN3722 to Load AND Battery
Like the title says, can I do this? I got two schematics in mind about how to wire these up, which one is the correct one?
This one is straightforward, but will it actually work if connected to load?
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How to disable battery charging in an inverter?
I installed solar retrofit to an already existing inverter battery setup.
Now during daytime,inverter will be in battery discharge mode by converting DC from battery to AC for appliances use.While ...
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Solar cell understanding of current vs applied voltage
I've been reading about the theory of solar cells, and doing some circuit simulations using the idealized model of solar cells. But I still feel like I have some problems understanding how the solar ...
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How do solar powered cars use the energy generated by the solar panels?
I want to know how companies who use solar panels on their cars utilise the energy generated by the solar panels.
Do they charge the traction batteries with the solar power or do they power the ...
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My daughter's science project is to charge AA batteries with a solar panel
We bought a 0.5 watt solar panel with 4.5 V, a 4 AA battery holder and a 15 ampere Schottky diode 45V , and 4 lithium ion rechargeable batteries.
We connected the red positive solar wire to the diode. ...
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Specific solar circuit setup recommendation?
For a setup which uses:
a 100Ah 12V battery (Absorbed gel mat Lead acid), with an MPPT solar charge controller,
a 12V 12-55A DC electric motor as the primary load,
additionally some 12V LED lights and ...
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Low current cut off
As you know, with solar panels, current lags voltage by a lot.
I want to run a DC pump straight from a solar panel. Simple, easy to maintain, low cost setup (relay, SS relay, diodes, etc.)
In the ...
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Confusion regarding the I-V characteristics of a solar cell
We know that I-V characteristics of a solar cell are described through the following equation :
This equation can be translated graphically to the following (ideal) circuit :
Now according to the ...
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N-array of monitored old lead acid batteries with solar panels
I would like to build a system of a arbitrary number of old and different specs. lead acid batteries (recycled) working with a solar regulator (mppt or pwm, doesn't matter).
The initial idea was to ...
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Voltage drop when connecting DC-DC booster XL6009 to my solar panel generating 10 V constant
I have connected my solar panel (rated 6 V, 3 W), and it is generating approximately 10 V.
This 10 V is fed to an XL6009 to generate ~15-16 V, which is further fed to a 4S BMS to charge.
I checked ...
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Solar powered iPhone for remote monitoring
I want to find a way to use a solar panel to power an old iPhone running a single app to continuously collect temperature and humidity data in remotely located beehives. The iPhone must be ...
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Can you prove that electricity was generated by a photovoltaic cell?
I am wondering if it would be possible to build a photovoltaic cell that kept track of the electricity it generated (perhaps with a built-in meter), such that you could not trick the meter without ...
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MPPT charge controllers in series to handle high voltages
If I have 500v of solar power can I run 10 mppt charge controllers in series? So each mppt would only see 50v because I'd be using 10 cheap mppt controllers in series. From there it'd be charging a ...
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Connecting lead-acid battery in parallel with lead-calcium battery
So I have a 12 V solar system (panels produce 20 V but batteries are 12 V. I also have a set of 5 batteries. One of these batteries is a marine deep cycle battery and the other is a group of five lead ...
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Solar panel specification
I am planning to buy a small solar panel where it is specified that it produces 6V and 100mAh. So does this means that the solar panel will produce 100mA in 1 hour or will it produce 100mA straight ...
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