Questions tagged [solar-cell]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
14 views

Using an ac adaptor for a dc only tv [closed]

I have a 12v 1.4amp max dc only TV. How do i getvthe right ac to dc adaptor for it. I have a ac to DC adaptor for another TV but I am afraid it might blow the solar tv. If I use it.
0
votes
2answers
32 views

Simultaneously Charge and Discharge a LiPo

I have what seems to be a rather common problem, a circuit in which i wish to be able to simultaneously charge and discharge (use) a LiPo battery. The "charge" going "into" the battery will be coming ...
0
votes
1answer
47 views

Grounding in a new solar setup

Currently I'm building the electric part in my converted RV. I got all components that I need and want to start to wire them now. But my biggest lack of understanding is the grounding part. The power ...
0
votes
0answers
17 views

Attach a Radio teleswitch (Funkrundsteuerempfänger) to GoodWe ET (GW5K-ET) inverter [closed]

How resp. to which port do I connect the Radio teleswitch (in Germany Funkrundsteuerempfänger) to the GoodWe ET-Series solar inverter (GW5K-ET)? In the English User Manual in section "2.5 DRED (...
0
votes
0answers
25 views

Any suggestions on a small hydroponic system using a NiMH AAA rechargeable battery to run a pump & small PV cell to trickle charge battery?

Let me start off by saying I am in no way an engineer or electronics pro; merely an amateur/DIY-er and High School Physics & Biology teacher. I enjoy building things in my off time to both bring ...
0
votes
1answer
49 views

Why do solar panels need to be the same voltages when in parallel?

I have an off grid solar system which I reciently upgraded from 12v to 24v. I have two 12v solar panels which I put into series to boost the voltage to 24v (I will refer to this as a single 24v panel ...
0
votes
1answer
37 views

MPPT buck converter vs Ordinary buck converter?

I’m building a small arduino project which is going to be powered using a small solar panel setup with a battery as it’s UPS for power backup during the dark. The setup is going to be like Solar ...
0
votes
0answers
52 views

Need help with setting up Li-ion battery parameters in a Solar Charge Controller?

I am trying to set up the parameters for a LiFePO4 battery bank for a solar charge controller. I have tried to search the internet for understanding the parameters listed in the charge controller, but ...
0
votes
1answer
22 views

Help with LiPo/solar panel/motor circuit

For a school project I am working on, we have been instructed to use the following circuit design: If you can't see the image, here's the general idea: The solar panel connects to battery via SW2. ...
1
vote
1answer
44 views

Full charged 12V battery with AC converter “empty” within one second - voltage drops, converter beeps

I have the following setup for solar power, which worked well until recently: solar panel <--> solar charge controller <--> small (car) battery <--> converter: 12V DC to 220V AC <--> my ...
0
votes
1answer
54 views

Can I design a photovoltaic system, or is that unrealistic?

I'm new to stack exchange, so ... feel free to ask for clarification, as many posters seem to be rather vague on their questions, from what I've seen. A little background: I'm a recent graduate in ...
0
votes
1answer
40 views

Schottky diodes in series to reduce maximum voltage at supercapacitor solar charging circuit

I use the following circuit to store solar energy harvested by photodiodes into a supercapacitor. The cap is rated at maximum 2.8V. The zener diode is rated at 3V, but depending on the harvested solar ...
0
votes
1answer
53 views

Micropower voltage regulator with discrete components

Overview I have an unregulated power source (photodiodes BPW34) from which I want to get a regulated voltage output 1V. My load consumes less than 10 microamps of current at 1 V. Constraints: I'm ...
0
votes
1answer
31 views

overcharging issues in MPPT solar controller with NO output leads

My MPPT solar controller has no output leads. It contains only the (+,-)leads for battery and solar panel. Input is from the solar panel and output goes to battery.Therefore, I have to connect my load ...
0
votes
0answers
41 views

Calculating Battery Charge from Solar Panel

I am trying to create an arduino system with radio-transmitters and radio-receivers. The system runs from a rechargable battery that is charged with a solar panel. I am using a 1.1W 6V solar panel. ...
0
votes
1answer
45 views

MPPT Reads Negative Amps

I have MPPSolar PCM5048 MPPT which is connected between the solar panels and the batteries. It was working well until yesterday as a sudden it reads negative amps on the battery current. it keeps ...
-1
votes
1answer
21 views

Connect a Li-Po battery to solar panel

In this related question I just setup a solar charger to a Li-Po battery, but it does not charge the battery at all, since the led in the charger circuit never turns to red color and the battery when ...
0
votes
1answer
49 views

Issues with hooking up a solar panel to an air pump for a mini-hydroponic School Project

I am new to Solar and but I am a High School Science teacher. My question is in regards to a small scale hydroponic project that runs off solar. I need to get the 6v 2w 350mA solar panel to power up ...
0
votes
1answer
47 views

Solar charger for Lipo battery

Im trying to build a little solar charger for a Li-po battery using 2 solar panels rated at 6V/120mA a linear charger based on the TP4056 chip The idea is to connect the two panels in paralel so ...
0
votes
0answers
16 views

Measuring consumption of energy supplied from solar plant

I have solar plants installed across multiple rooftops in my space. The output of the 3 phase inverter in each building is connected to the electrical panel board of the same building. The output of ...
0
votes
1answer
31 views

Dual power sources (PV cell and battery)

I have a small IoT project with a 280 mAh Li-ion battery. My intention is to plug in the device and charge the battery when it dies, but I wanted to extend the battery life and have been thinking ...
0
votes
0answers
38 views

Questions about tapping a normally 60V solar panel at 3 different places

I have a PV solar panel that is 96 cell, about 60 volts open circuited, and it seems to be divided in 3 subregions which are vertical. The cells are arranged in 8 columns, 12 cells high. The panel ...
0
votes
0answers
18 views

400VDC LiFePo4 charger?

I have a solar electric system from many years ago. The setup runs on 400 to 480VDC from a string of solar panels. I have a unit that converts 250 to 600VDC to 48VDC for charging lead acid ...
1
vote
1answer
31 views

How to keep a stable output voltage from changing input voltage

I'm learning about solar panels and bought a 6V panel and a 3.7V Li-Ion battery as well as a solar battery charger, all from adafruit. I also got a boost converter thinking that the output of the ...
0
votes
1answer
19 views

Recharging of Inverter Batteries

Is it possible for some reason I can be able to safely connect two charge controllers (who draw their solar power from the same solar panel array) to charge separate/independent batteries? (It is to ...
0
votes
1answer
39 views

one solar panel is getting more power than another panel connected in parallel

what if one solar panel is getting more power than another panel connected in parallel? say if you have two 500w solar panels and one is getting 100% solar radiation and the other due to a angle is ...
0
votes
1answer
32 views

An IC to manage Solar, USB and Battery supplies

I've been looking for an IC to manage my Solar and USB input to charge my LiPo and power my circuit and I found this IC. It seems to be able to automatically switch between USB and Vin to charge the ...
2
votes
1answer
90 views

How to connect a photovoltaic to a heating element directly

I am trying to connect a photovoltaic panel directly to a heating element (coil) without using a battery or an inverter and switch it on or off by using a transistor or a thyristor. I am well aware ...
0
votes
1answer
33 views

Battery connected to TP4056 will not operate load

I have a simple circuit with an Arduino board (load in the diagram) that I want to power using a solar cell via a TP4056 board. The 18560 Lipo battery is for powering the Arduino during night time. It ...
0
votes
1answer
36 views

How is power generation computed in a circuit?

I have made a simple circuit of by attaching a 10 ohm resistor in series with an LED and then attaching it to the solar panel. I use an AVR Microcontroller to measure voltage across the resistor ...
0
votes
0answers
14 views

Fail to reboot after recharge, ESP32/ESP8266 using a MPPT and 18650 battery

I try to build a solar energy operated project. I'm using an ESP32 to wake up every 45 minutes, measure bat's voltage using board's ADC, and send it to an excel sheet on Google drive. The part of ...
0
votes
1answer
60 views

How can I switch solar panels on and off with a microcontroller?

I have built a li-ion 18650 7S pack as my solar backup. It is being charged by 3*250W solar panels in series (about 105V 8A.) My charger doesn't have an option to monitor individual cell voltages. ...
0
votes
0answers
28 views

Help modifying solar cell to include water cooling on simulink?

Hi, for my honours project at university i am basically doing an analysis of how water cooling a solar panel improves efficiency by decreasing the temperature of a solar cell. Part of my thesis ...
1
vote
1answer
59 views

Are bypass diodes in low voltage solar panels with parallel cells really needed?

I have 5 solar cells, ~3W ~3.3v 900mA each, a total ~15W, connected in parallel. Considering the low voltage and current involved, do I still need a diode attached to each cell? Will I still risk ...
0
votes
0answers
70 views

Using Solar Charge Controller with AC Power instead of Panels

I'm working on a project here which needs to have a small SLA backup battery. I have a cheap PWM solar charge controller already and I want to use plugged into an AC power supply (48V DC out) in ...
6
votes
2answers
190 views

Why is it desired to divert the surplus PV power into a resistive load?

From wikipedia/Maximum_power_point_tracking: When the batteries in an off-grid system are fully charged and PV production exceeds local loads, an MPPT can no ...
0
votes
1answer
91 views

I'd like to make a Led that lights up by solar panel [closed]

I'd like to make a solar panel that lights up an LED, not by charging a battery to power the LED, just live energy it is getting from the sun. I'm a real noob and need some advice. What panels should ...
-1
votes
2answers
57 views

Big photovoltaic current

A photovoltaic cell is just a photodiode connected to a resistor.Now if simulate this circuit – Schematic created using CircuitLab I put many photodiodes in series , this would create a bigger ...
2
votes
0answers
118 views

DIY UPS for Home Automation/Energy Management system

OK, the original post asked too many questions and I was asked to rewrite the post question. So after reviewing the old post and rethinking the project here it is. So, as requested, I will ask 1 ...
0
votes
1answer
52 views

Can I connect an inverter supply and AC mains supply in parallel? [closed]

Consider a solar panel is used to charge a battery and the battery supply is fed to an inverter. When the mains AC supply goes off then the backup battery supply kicks in. Suppose I want to reduce my ...
2
votes
1answer
64 views

Effect of Rapid Switching between Charge/Discharge of Lithium Batteries

I have made a DIY offgrid solar generator that utilizes an arduino to determine when to dump excess energy to a water heating load. I have programmed the arduino to activate the load circuit when the ...
0
votes
1answer
30 views

Solar car ventilation system

I am a mechanical engineering student and for my final project I am designing a solar car ventilation system so I need to know how much power the air conditioner of a car (Mazda Lantis 323 2001) fan ...
0
votes
2answers
63 views

What will happened to the electric/electronic equipment if we supply with different Cos Phi?

In some part of our country, the cos phi is 0.9 while in some other is still 0.8. The higher the cos phi the better. The power is belong to government (say the name is MAINS). Different cos phi is ...
1
vote
1answer
54 views

Electrical calculation

I'm need to calculate the how long it will take to charge a battery using a solar cell. I am not taking any charge curves into account, I just want to get a close answer before I run the experiment. I ...
0
votes
1answer
140 views

Solar battery draining too fast

So I have a Bosch L5077 180A 12v deep cycle sealed Pb battery for my solar setup. I bought it recently (2 weeks ago) but since the weather was rainy the last 2 weeks and the solar panels didn't ...
0
votes
1answer
18 views

Using solar to recharge a Li-po battery

I'm looking for help determining what size of solar (PV) I should use to recharge my Li-po battery after discharged. Battery Characteristics :Capacity:1600mAh Nominal Voltage: 3.7V Charging ...
0
votes
0answers
36 views

2 NICE tubular motor connections with wind sensor

Hi, I have 2 NICE Era Mat T tubular motors, working togheter with the TTBUS RS232 protocol ( Cable (1) + Cable (3) GND ). Now I have installed the 4 buttons to open/close the blinds. Without the ...
0
votes
1answer
42 views

Solar Module Voltage when bypass diode activate?

What happen to the voltage level when a solar module is shaded and one of its bypass diode is activated? Assuming this solar module has 3 bypass diodes. I have been reading and can't seem to ...
-2
votes
1answer
70 views

How to reduce to 10 V from a 44 V, 18 A solar panel supply?

I get 44 volts, 18 amps and 700 watts from two solar panels. I want to reduce approx 10 volts to run my inverter directly on solar panels instead of batteries during the daytime.
0
votes
0answers
21 views

Modeling PV + Battery Storage for Frequency Regulation + Energy Arbitrage

I have developed a PV-BESS dispatch model in Python for operation in frequency regulation market while also performing energy arbitrage. The problem I am encountering is that in some hours during the ...

1
2 3 4 5
18