Questions tagged [solar-energy]

Form of renewable energy emitted by the Sun, coming in two flavours: photovoltaic and thermal. The former, especially, relates closely to electrical engineering since it is traditionally harnessed through semiconductor devices and converted to AC in order to feed the electric grid or individual users' homes.

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60 views

Solar panel not charging LiPo Batteries

I am a totally beginner in electronics and I am facing a big problem with my prototype. I am trying to create an autonomous circuit that runs an Arduino powered by a 3.7 LiPo battery. The problem that ...
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51 views

CN3722 solar charging IC not working properly

I'm currently working on a custom PCB where I have a microcontroller hooked up to 3 LiIon batteries which are meant to get charged by a CN3722 IC. However, when I connect a solar panel to the circuit ...
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Can a power inverter and portable EV charger be used to charge an EV from solar panels? [closed]

I was wondering if I could combine the following items: This type of EV charger which plugs into a wall outlet and draws about 2KW. This type of power inverter which converts 12V DC to 240V at a max ...
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57 views

Is off grid solar setup limited by battery charging current?

This question is strictly regarding off grid solar power setup, using PV panel, MPPT Charge controller, battery and an inverter to convert DC to AC. Am I limited by the input charging current a lead ...
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79 views

How does a 90 watt fan consume power from a 500 watt solar panel?

I have a ceiling fan that consumes 90-watt energy. If I have a solar panel that generates 500-watt energy, then how does a 90-watt fan consumes only what it requires from a 500-watt solar panel.?
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43 views

Drawing energy from a 3.7V LiPo battery while simultaneously charging with a solar panel

I have a 200mAh 3.7V (0.7W) LiPo battery that I am looking to use as an energy source for a large model airship. I also have a 7.2V 100mA (0.72W) solar panel that I would like to use as a means of ...
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57 views

Does doubling conductors double the ampacity?

If I have a 4Awg copper conductor being used as a bus bar for a lithium ion battery pack, the chart at https://www.powerstream.com/Wire_Size.htm seems to imply that I can run 135 amps through that bus-...
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50 views

Solar requirements for 5000W equivalent system [closed]

I currently run a fridge-freezer and larger freezer, some lights and computers off of a 5000W, 220V to 110V (50 Hz) transformer. I am trying to run that on off-grid solar instead of using the ...
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28 views

Simple rectifier, solar to 18v ac

Would it be possible to charge a Ring video door bell from solar power, but using the doorbells external pins for the wiring of a 8 to 24v ac transformer. Say using a 12v solar panel, would regulation ...
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63 views

How to make a solar battery charger using more than 1 Lithium polymer

I have atleast 5 lithium polymer [not 18650] batteries taken from laptop. the print on them is pale, it is 14.01wh [ 6 cell 6 x 14 = 84wh, but i split each battery now] it is 3840mah each. I would ...
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130 views

Why can't I use solar PV system while disconnected from grid?

During utility power outages, a simple grid-tie solar PV system is required to auto-disconnect from the grid for safety. One cannot utilize power from the PV system while disconnected from the grid (...
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81 views

Can I use the same electrical ground for everything in a van?

I have the following setup in my van . BAT1 is the battery in the front of the van which was build in. It is being charged by the alternator while the car engine is running. This also turns on the 12V ...
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1answer
77 views

How does the photovoltaic inverter synchronize with the grid?

My question is somewhat related to this one. Most of the 3 phase inverters used for photovoktaic (PV) on grid installations can work only if there is AC voltage present. After the AC voltage ...
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27 views

Connection question for Renology - order and possible converter needed?

I bought a Renology 100w solar panel with charge controller - and I see in the controller instructions booklet, "Never connect the solar panel array to the controller without a battery. Battery ...
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1answer
53 views

Which form between solar panel and wind turbines requires less cost in servicing?

I found that the average life of a solar panel is about 25 years and that of the the wind turbine is also somewhat close to 25 years. But the wind turbines require alternator in order to generate ...
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1answer
47 views

how do the micro-inverters stay in sync(phase-lock) in a grid-tied residential solar panel system

I'm looking for a little more detail on how the all the micro-inverters sync up to the phase on the grid 60Hz. In communication circuits phase/frequency locking is done with a PLL(phase lock loop). ...
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63 views

Wiring for solar powered house [closed]

I am trying to design electrical wiring for a small 1-bedroom house which will be only powered from solar panels. The minimum appliances in a house would be: Appliances available in 12V DC: LED ...
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1answer
66 views

Unexpected wattage into charge controller (solar panels)

I'm building a solar system w/ battery for my camper van. Two identical 110W panels wired in parallel, going into an MPPT charge controller and battery (a Yeti 1000 by Goal Zero, 96.8Ah (10.8V) ...
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63 views

Can I charge a super capacitor with a MPPT?

I already did some testing. I have a 220mW solar panel that charges a 3V supercap (takes a long time) which eventually powers my wifi module that needs ~1.5W (1.5 J/s) for 1 second then ~90mW (0.09 J/...
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102 views

Why did my 12v battery charger blow, when connected to a 12v battery in a 48v bank?

this is a puzzler here. I have a 48V bank of Battleborn lifePO4 batteries connected to a huge 10kva inverter. When I tried to charge one of the 12v batteries while the pack was still connected to the ...
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2answers
108 views

Using solar power to create steam to spin turbine

Please read this question again now I have amended a glitch. The idea it to use a small solar panel to generate electricity, which will be sent to an element (or other device) which will heat up water ...
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43 views

Relay for Solar System as Backup Only

Background I'm working on a seismic alert network and seismograph station at my school in Puerto Rico. We're building a solar system for the system to continue running during a potential seismic event....
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22 views

Photovoltaic systems - typical values of electrical current

SOLAR PANELS -> CHARGE CONTROLLER -> [shunt A] BANK OF BATTERIES [shunt B] -> INVERTER - AC OUTPUT What are typical values (to give examples) of electrical current on shunt A (current in on ...
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58 views

Best way to create a daylight charging station and for a laptop of 135W consumption with solar energy and lower battery capacity posible

I want to create a charging station and for a laptop of 135W consumption with solar energy, because in my area electricity outages are normal (5 hours per day or more), but I need some help? I want ...
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2answers
78 views

Any DC-powered, fast water heaters,induction heaters? [closed]

Does anybody know a DC water heater? I am looking for a coil type design, so I can place it at the bottom of the container and it will get evenly heated. I need this to be DC and I am going to power ...
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36 views

Connect multiple MPPT charge controllers to a single solar panel?

I have a small 18V/80W solar panel and some old lead-acid UPS batteries (that I got for free). About half of them are one brand and the other half are another, so I don't want to connect them all in ...
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1answer
50 views

Power factor down after solar connection

We installed solar plant in factory. After that power factor goes down to 0.16. Normally it never goes below 0.85 in history even if we keep APFC off. We always maintained it to 0.99. Note - Main ...
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1answer
147 views

Can you desalinate or distill water with a Peltier module?

Can you use both sides of a Peltier module to distill water? Using one side for heating and the other side for cooling. If so what type of Peltier module do you need and can you make it solar powered? ...
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16 views

Supply interchanges between AA batteries in series and solar panel

I want to supply my product that has a sleep consumption of 40uA and an elevated consumption of 200mA during standard use. I want to use the solar panel to supply the 40uA during the sleeping time and ...
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2answers
62 views

How do I measure the amount of energy consumed by a device?

I am considering installing solar panels to power a shed. The shed will need a lighting, a fan, a heater, and some other appliances. How do I measure how many kilowatt hours of energy is consumed by a ...
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67 views

dead car battery charged using solar panel?

I have 12v calcuim+ battery was on my car but now it is almost dead (8.9v) I bough solar panel and charge controller to charge it. i put it in the sun for two days and now it is 10.5 volts but still ...
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45 views

Given a fixed area on a solar panel, at what point does adding cells in parallel not increase voltage?

Given a fixed space on a solar panel, all else equal, adding multiple cells in series increases the voltage (while current remains the same). For example, two cells equals 0.5v + 0.5v = 1v total ...
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27 views

Is there a difference in voltage/current between a solar panel with 36 individual cells or one big cell?

When wiring solar cells in parallel, the current is additive but the voltage remains the same. On the other hand, when wiring solar cells in series the voltage is additive, but the current remains the ...
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2answers
48 views

Whats the difference between a grid tie dc ac inverter and a normal dc ac inverter for 12 v or 24 v batteries?

what are technically the differences between a grid tie solar inverter, which takes as much power from the connected solar cells as possible, on the dc side, to convert it into 230v ac power and a ...
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20 views

Indoor / outdoor solar cell (Amorton): maximum light conditions

I am currently searching for a proper solar cell to power an IoT device (just a simple logging device). Although it is just for my own usage, the sensor should be properly engineered. My main ...
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2answers
60 views

Understanding Buck Converters and Solar Panels

I have a solar panel rated at 5V 80mA and want to increase the output current significantly higher to around 500mA and decrease the voltage to either 3V or minimum of 2.7V, how can I go about this? I ...
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1answer
76 views

Can I increase my power output from my solar panel using a capacitor?

If I have a 3V, 70mA solar panel rated at max 210mW. If I design a RC series circuit with it, can I increase the power outlook to about 2W? If so, how can I determine the time it takes to charge? Also,...
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2answers
133 views

How can I power my device using a Solar Panel and capacitor bank?

"I want to power a module that requires 3.3V and 500mA minimum for startup. I have a solar panel that outputs max 3V at 70mA and a 3.3V 3A max output boost converter. I know I need a super ...
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0answers
40 views

Designing split-phase grid-tie solar system

I'm in the process of designing and building a grid-tied solar power system, and had I'm having trouble finding a solar inverter that isn't MASSIVE (the smallest one I can find that meets my use cases ...
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25 views

DIY solar setup related questions on following topics: VSR, storing batteries correctly, wiring diagramm, misc

Please keep in mind I am not an electrician, however I have spent a lot of time researching the basics to obtain a fundamental understanding of the topic. Also, this project is an enhancement to an ...
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1answer
38 views

Using MCP1700-3302E LDO for Arduino/ ESP32 Solar projects

I'm using Solar-powered projects ( including batteries ), for remote sensing/ reporting. When Battery drains below a certain voltage (~ 2.7-3.0v) due to lack of sun, MCU gets into "zombie" ...
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49 views

using 12v battery charging by 20w solar pannel, can i use 12 v directly plug in to my 12v 1A router without its adepter? [duplicate]

In my home i have installed solar pannel in 9 years ago. (20W pannel, 12V Solar Battry 35 A, 20Hr). Where my battry is almost dead but still it is working.we can use its 8w load to max 3hrs. But in ...
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36 views

Powering a max 360 W Ender 3 Pro with a 300 W inverter

I’m planning on powering the Ender 3 with a 200 W solar panel with a 300 W inverter. I saw on some posts that the Ender 3 draws 500-ish watts whilst starting up but then drops to an average of 150 - ...
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3answers
78 views

Solar powered mini water pump: how to turn it on/off automatically

I have acquired a mini water pump (5V 1.0A) and several solar panels (each: 5V 200mA). What I try to achieve is to pump water from a container above a vertical hydroponic system and let it flow down ...
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1answer
76 views

It is possible to use a 100W 12V solar panel directly to charge a laptop, using a buck converter for example?

I am planning to go off the grid due to the pandemia, to an isolated village. I am working remotely I am looking for a solar approach to power my laptop ACER A5 515. The charger is rated 40W. I was ...
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3answers
36 views

Using a LiPo battery or different battery for outside project

First I am sorry if this is the wrong section to post this, I have been searching for a clear answer and haven't found one yet. I have a project that I want to keep outside. I have a solar panel, ...
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1answer
64 views

Solar panel to battery, dc to dc converter question

I need to design an MPPT and the converter that uses it. the thing is: the Solar panel has a max voltage of 40V and the battery that is going to be charged is around 100V, the most easy thing would be ...
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1answer
58 views

Systems Engineering Solar Energy Diagrams

I'm currently taking a grad course in Systems Engineering. I'm dreading it a bit as I've taken grad math for the past 3 years and this is my first writing course in a while. We're covering context ...
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3answers
57 views

Solar DC circuit: Preventing Buck Converter from Dropping out Due to Motor switching on/off (in Parallel)

I have an off-grid orchard which has a well pump running directly off of a 24v PV array. (27-32v when at full power) Parallel to this direct circuit, I have a buck converter to power a Raspberry pi (...
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1answer
39 views

How to deal with “Brown on” slowly increasing voltage/current from solar panel to power mcu

With a solar panel powering an Atsamd21, I have the problem that the mcu will not boot correctly and gets stuck at some point. How can I deal with this? I thought of adding a large enough capacitor ...

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