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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2answers
106 views

How to connect solar panel to boost converter

Here I design a boost converter with 5 V input and 19.37 V output and it is working very well when the source is DC battery but when the source is a solar panel with also 5 V output I ...
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5answers
101 views

How Can I connect My Solar Power System? [closed]

I brought this 50A Solar Controller now I want to connect an inverter to it and they said to connect the inverter directly to the battery. I also brought a 100W Solar Panel and MC4 Wires, etc What ...
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1answer
350 views

Solar power to USB C PD

I want to convert direct sunlight energy into usb c pd. USB C Pd then will be used to charge a powerbank. The bank can be charged via USB C. The actual solar panel is this: https://www.amazon.de/...
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3answers
220 views

How can I trickle charge NiMH batteries as part of an IOT controller?

I have built an IOT motor controller board that's powered by 4 AA NiMH batteries in series. I want to use a solar panel to trickle charge the batteries, but the voltage slowly decreases even when the ...
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0answers
89 views

TP4056 - Li-lon Battery Charger enable pin not working

I designed a small lithium battery charger with the IC TP4056 but apparently the enable pin (CE) is not working. My setup is depicted in the following block diagram: Basically the input voltage (...
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1answer
28 views

DC current surge suppression

How can I reduce or supress the in-rush current for an inverter? I have a pair of 100 watt solar panels feeding into a solar regulator (TPS 1230) which is connected to a 12v 100 Ah lead acid battery ...
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1answer
211 views

How to repair solar panels without being able to source an exact replacement diode

How can I repair a solar panel (replace the blocking diodes) without access to the exact same components? I have a 100 watt 20volt semi-flexible solar panel marked PV-XC502 on the junction box, ...
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1answer
35 views

Two power sources into appliance (12Vdc)

I am creating powering board for LED strips inside the cacti glass house. It consume 12V DC around 2 amps. I would like to power them up from battery (charged by solar, lead-acid battery 20Ah), but if ...
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1answer
62 views

How to power a 10-watt electric circuit without grid connection in cold countries? [closed]

What options do we have for powering electric circuits without access to electric grid? For instance, to power a 10 watt LED lighting at night? The motivation to the project is to add some lighting in ...
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2answers
178 views

How to tell if a solar regulator is MPPT or PWM

I have a solar cell charging a 12v battery via a maplin TPS 1230 solar charge regulator. By using some basic instrumentation and some simple maths (i.e. measuring the current and voltage on the input &...
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1answer
21 views

How are solar spectra simulators used and are they used to test photo-diodes and image sensors?

For example here is link to a Xenon lamp solar spectra simulator Xenon lamp AAA Class Solar Simulator. Two spectra are shown in the plot given in the link, one for the AM1.5G reference an other of ...
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1answer
102 views

What's the benefit of 24V over 12V in solar and charging?

What are all the benefits of 24V solar systems over 12V solar systems in regards to solar panels and battery charging? All I've been able to find is that you can use smaller gauge wire with 24V, ...
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2answers
65 views

Charging a Li-Po with a solar panel

I'm looking to setup my e-bike touring bicycle with a solar outfit so that it can charge on the road, but am unsure of the electronics. I appreciate the size of the panel will be huge, but this can ...
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2answers
61 views

Solar RC Airplane – Trouble with Mini Solar Lipo Charger

I'm in the process of building a solar powered remote controlled airplane. My general idea was that I have 5V from the solar panels powering the receiver, the ESC, two servos and a brushless motor. If ...
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4answers
94 views

Solar cell outputs full voltage but barely any amps

So I've asked a similar question in the past, but I'm still curious about something. On a fully sunny day, the solar panel tops out at 5.5v @ 260 mA. On overcast or cloudy days, the voltage stays ...
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1answer
31 views

The best way to test a solar panel generation

Is there any way to test how much a solar panel on a given position can generate for let say a day or few days. Like a multimeter that can automatically test the wattage days example? Or create a ...
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1answer
26 views

Using USB to supplement solar panel

I have a solar panel that outputs maximum 1.2W (7V, 0.17A). a 5V 1A USB power supply a 3.5-9V, 1-3W water pump. I'd like to have the water pump running all the time using power from (1) and (2), ...
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1answer
43 views

Custom charger with solar cell

I want to make kind of autonomous power supply for my RPi. So that I am planning to use 12V solar cell and batteries for this project. Also I will use Arduino to controll all of this stuff - to ...
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1answer
77 views

Does the load at where Pmp of a solar panel is oberved change with temperature?

After reading up on solar panels, I know that the max power that a Solar panel can supply (\$P_{mp}\$) will drop as the temperature increases. The \$V_{oc}\$ will decrease a lot more than \$I_{sc}\$ ...
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0answers
45 views

Solar Powered Arduino

I am using a USB Booster Converter as shown in the following link https://www.instructables.com/id/SOLAR-POWERED-ARDUINO-WEATHER-STATION/ and I would like arduino to power off during the day and light ...
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1answer
112 views

Mosfet or bjt choice for low voltage joule thief application

I make solar energy harvester using joule thief circuit with a small solar cell as the input. The output voltage from the solar cell is 0,5V. But the generic transistor, exactly silicon material need ...
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1answer
49 views

PV voltage on solar charge controller always 13V [closed]

I just wired a solar panel with solar charge controller (SCC) and battery. The photovoltaic (PV) voltage displayed on the SCC is 13V, even though the PV voltage without load that I measured with a ...
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0answers
27 views

Solar Panel (5v/500mAh) charging USB Power bank (5v/1a)

I've been trying to find information on this but haven't found an accurate answer. I have a USB Power Bank that has a max charging input of 5v/1a and a 5v/500mAh solar panel that can output up to 5-...
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3answers
46 views

Balanced Charging of ZOP 2s lithium ion battery

Good day everyone, I recently purchased a “ZOP Power 7.4V 2200mAh 2S 35C Lipo Battery T Plug” for a project. I have designed a circuit to charge the battery, but now I am wondering if it is necessary ...
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1answer
68 views

tp4056 dw01 ground isolation

I'm building a solar project to monitor charge current and discharge current as well as lipo 'State Of Charge'. The configuration is a 5V solar panel feeding a TP4056 which B+/- connect to a MAX471 ...
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1answer
127 views

TP4056 doesn't work without power source connected [closed]

I have a problem with my TP4056 circuit. My goal is to (solar)power a NodeMCU V3 with the TP4056. I simply connected the output from the TP4056 to VIN and GND from the NodeMCU board The TP4056 ...
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1answer
35 views

Drawin max power out of solar panel by keeping its voltage constant

I wanna build a simple MPPT that keeps voltage on output of the solar panel constant. According to documentation, maximum power is drawn, when output voltage is about 4.2V. My way of reasoning is like ...
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1answer
37 views

PV Jacket Project [closed]

I was hoping to get some guidance on a project I am working. I am building a jacket which will have PV panels on it which will be used to power different types of loads. At the moment, I am lost with ...
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2answers
74 views

Using solar with a 3 phase motor to generate stable 3 phase current

I have a 220 V 100 hp electrical motor. I initially had a plan to use the grid 110 V through a step up transformer to get to 220 V along with a 480 kVA capacitors to kick ...
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0answers
44 views

Two solar panels with separate battery or one panel with one battery?

I have already bought a 12 V 40 W solar panel. Its controller is also on the way. I will be using it to charge a lithium ion battery pack of 12 V 13 Ah. The charge controller ...
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1answer
69 views

Photodiode current vs. irradiance and finding upper limit current

1.) What equation could be used to calculate, or make a decent estimate of the current produced by a photo-diode from incident irradiance and its operating parameters. For example for this PIN photo-...
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1answer
87 views

I want to know how to charge my 48volt battery park

I have built a solar car by myself, but I can't let my battery get fully charged. I use four 12V batteries as a 48V battery, and I use 3 solar panels. Each have 19V, 18V at early morning and dusk, and ...
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0answers
28 views

Solar Cell Formula - I/V from Load Resistance

Background: I have the following simplified formula in a VisualBasic program that gives me current output (Icell) from variable input Volts (cellVoc) for a simple PV cell simulation. By varying ...
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0answers
35 views

Protecting Copper Anode in 12V DC System

Getting to grips with cathodic protection here. If someone had a 12, 24 or 48VDC system, say solar PV and batteries, and the battery negative is earthed, this means the earth is the cathode, and the ...
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0answers
45 views

Does MP2617H power management IC need an external regulator to supply “Vin” using a 12V solar panel?

I'm designing a LiPo battery charger using MP2617 power management IC. When I referred to the datasheet it tells that these ICs have an internally integrated voltage regulator for the battery charging....
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1answer
50 views

Correct way to ground components for solar panel measurement

I'm currently doing a project where I'm supposed to measure the current and the voltage from a solar panel and am unsure of how I should ground all the components in the circuit (since electrical ...
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1answer
106 views

Preventing overcharge of a SLA battery in a solar electric fence charger

I recently purchased a solar electric fence energizer, specifically the Patriot PS5. After it had been sitting in the sun a while, I noticed the battery was making a "gurgling" noise, which according ...
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0answers
56 views

connecting solar panels cells with copper adhesive foil

i have purchased some cheap solar panel cells , as am bad it soldering , so i was wondering that Is it good practice to connect solar panels with copper adhesive foil or bad , because with copper ...
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2answers
83 views

Trickle charging 10NiMh in series with ~1W solar panel

I have been put onto a project that needs to be powered by a small (1-2W) solar panel trickle charging a battery pack. The product will be located on rooftops. We have reviewed similar products and ...
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1answer
65 views

Advice for a Solar Charger and Battery Project

I am a high school robotics teacher (no formal engineering training) and I am taking a group of students to Kenya this summer to work with high school students there. The organization we are ...
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1answer
78 views

Can I charge this li-ion battery with this solar panel setup? [closed]

Since a couple years I've been messing around with a raspi and some motors. Building random stuff with dc-motors and such. I now want to power a self driving boat-robot with some solar power. For this ...
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1answer
193 views

Floating DC power supply (solar panels) - do I need double-pole breakers and why?

I am in the process of building a small off-grid solar setup. There will be 4 parallel strings of panels in this setup, and I understand that for 3 or more strings, you need some sort of over-current ...
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1answer
66 views

Using Diode As a Solar/Lightbulb Cell

...hi :) a few days back I saw this Instructables.. https://www.instructables.com/id/Using-Diode-As-a-Solar-Cell/ ...so I started to experiment how this can be used to charge a cellphone or a ...
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1answer
252 views

Solar Panel Not Powering Toy DC Motor

I made a 15v solar panel from garden lights which supplies 50mA of current in direct sunlight. For some reason it doesn't power a simple dc motor which can run on a 1.5v battery. Why isn't it powering ...
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0answers
40 views

solar tracker slew drive end stop

I am designing a solar tracker and using a slew drive to rotate the panels from from east to west every day. Now, I would like to install a sensor that can be used to determine and calibrate the ...
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2answers
376 views

Can I use a MPPT Solar Controller to charge my auxillary 12V AGM Battery from the car battery/alternator?

I have a RedArc solenoid and a Victron 75/15 Smart Solar Controller. Can I use the combination of these two units to charge an 12V AGM Deep Cycle auxiliary battery from the car battery/alternator ...
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0answers
32 views

Effect of solar PV leftover power on transformer? Will that power step up the transformer from secondary side?

I am trying to connect an ongrid inverter through a microgrid but that inverter takes a split phase supply due to which i have to develop split phase supply using transformers. Now my question is that ...
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3answers
157 views

Off grid LED solar lighting without batteries

I have 2 COB LEDs (12-14V DC, 50W, I think with 3,75 A in data sheet). I need to run them with a solar panel, it should only run when there is sunlight no batteries needed. Using a 270W panel (open ...
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1answer
174 views

Powering a microcontroller with a small solar cell and a capacitor

I'd like to power a microcontroller with a small solar cell. The idea is for the solar cell to charge a capacitor, and when a given voltage is reached, do some clever things to discharge the capacitor ...
2
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1answer
70 views

Strange voltage reading on ungrounded system

On a small scale off-grid PV project I received a strange voltage reading and I am hoping that some folks here could possibly shed some more light on what exactly was going on and why. Here is the ...

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