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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
18 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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0answers
29 views

LT3652 + solar panel + LiPo battery [on hold]

Can I simulate LT3652 + battery charging process on Matlab Simulink? If not, please kindly advice about the software that I can use?
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0answers
30 views

Capacity/Losses/Charging/Discharging time of lithium ion battery

I am doing calculations for solar panel and I googled to find out that the best suggested battery used with solar panels are Lithiom ion batteries. I learned from wikipedia that pukert's law is not ...
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2answers
37 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
33 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
40 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
73 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
37 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
147 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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0answers
36 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
34 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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0answers
34 views

Connecting a series of solar panels to ac inverter

The 1000W inverter has a DC input voltage range 45V to to 90V, each 330W panel has dc output of 55V.....Can I connect a series of three 330W panels without exceeding the 90V limit of the inverter? I’m ...
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1answer
29 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
69 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
61 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 ...
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1answer
77 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
32 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
32 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
60 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
95 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
48 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
33 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
62 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
47 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
37 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
56 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
86 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
47 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
77 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
10 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
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1answer
97 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 ...
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1answer
24 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
38 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 ...
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2answers
213 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
30 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
97 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
65 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 ...
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1answer
71 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 ...
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1answer
110 views

I need help connecting 2 solar panels in paralel

I'm new to Electronics but I love solar panels and hiking. So, I bought 2 of these and one of these and I connected them. I cut 2 USB Cables, connected + with + and - with - from each Cable and ...
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2answers
73 views

Solar powered water pump - need some advice

I am completely new to elecrical engineering, but I want to give it a shot and am really interested in learning more details about how all of it works. I've had an advanced physics course in high ...
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2answers
143 views

0.9v boost with Tp4056 for 6v Solar Panal?

Can I use it like this... If so how can I limit my solar panel to only output 5v cause my booster can only handle up to 5v input.
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2answers
87 views

Is it safe to connect a small solar panel to a lead acid with only a diode?

Is my setup safe? I'm connecting two 7.2v 100ma solar panels in parallel using two 1N5817 then to a to 6v lead acid battery with a Constant Voltage Charge of 7.3-7.4v for cycle use.I can't use a MPPT ...
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1answer
40 views

Outdoor versus indoor amourphous silicon solar cells

I've read in a few articles that amorphous silicon (a-Si) based solar cells have a greater spectral response for indoor light conditions here. If this is the case, then why manufacturers emphasize ...
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1answer
32 views

Photovoltaic/solar power supply for Raspberry Pi [closed]

I want to build a power supply for my Raspberry Pi zero. It needs 5V and 2.5A (2A also working but only if 2.5A is not possible). I want to use solar cells to get the 5V and 2.5A. I have already ...
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3answers
56 views

Starter circuit for solar module driven pump motor

I have a 24 V 100 W solar panel and a 24 V DC 50 W pump, which has a resistance of 2 Ω while at 0 rpm. The solar panel is directly connected to the pump motor. The problem is: While the solar panel ...
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votes
1answer
165 views

TP4056 heating very badly

I’m charging a Li-ion 3.7 V, 3500 mAh using a TP4056 charge controller IC and feeding a 6 V, 9 W monocrystalline solar panel to charge it. When I connect the solar panel at good sun light at 2 PM in ...
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1answer
42 views

Charging a single 12V battery from 2 solar panels

I'm building a solar powered robot that uses a 12V lithium battery. It will have two (17.6V max) solar panels - one on the top and one on the bottom (so it will still work if it flips), meaning I won'...
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2answers
72 views

Ampere in Parallel Circuit not increasing linearly [closed]

I have a PV panel circuit, connected in parallel configuration. Each panel (enclosed in dotted square) is of ~30V. The problem is, total amperes on the output do not increase linearly; even though ...
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1answer
63 views

Harvesting energy from a truck

I'm trying to create this prototype where I will require constant charging power for a sensor i will install on a trailer (container truck trailer). However, due to some problem, I wasn't able to tap ...
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2answers
109 views

Low-power solar cell source using capacitors

I am designing a circuit using AtTiny10 to supply a downstream microcontroller with power using only capacitors and a small solar cell. Would the following design work ? The basic idea is that the ...