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

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2answers
51 views

how long charge li- ion battery

I have \$3.7V\$ Li-ion battery \$3800mAh\$ and Solar panel \$U=5.5V, I_{max}=290mA\$. Battery will supply arduino with sensors taking \$100mA\$ current. How long will it take to charge the battery ...
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0answers
40 views

Handmade usb charger

I am a mechanical engineer and I don't have so many knowledge on electronics. I tried to make a solar charger . I had a 12v12ah battery,a solar panel 20w, a battery charger and a dc-dc converter ...
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3answers
63 views

How to power a 12V fan simply using a PV panel?

I am an electronics noob and I'd like to create some air circulation through my friends cellar using a salvaged 12V 0,8A brushless DC computer fan and a suitable PV panel. I have searched Ebay for 12V ...
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0answers
48 views

Could somebody check this circuit/components and size the resistors?

simulate this circuit – Schematic created using CircuitLab Could somebody please check this circuit/components and size the resistors for me? I'm trying to produce a variation of this: ...
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2answers
83 views

Trouble with Transistor Switch (2n3906)

simulate this circuit – Schematic created using CircuitLab I'm replicating a circuit found on evilmadscientist.com: the "detecting darkness" ...
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1answer
40 views

How to estimate solar panel output as a function of solar radiation

Apparently, according to EarthScience.SE, the measurement of how "bright" a given day is, is measured in units of kWh/m^2, known simply as "solar radiation". ...
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1answer
20 views

Sizing Photovolatic cells based on solar load

I'm designing a Photovolatic system to power up a certain electrical load (around 1000 Watts). I've just finished my solar calculations determining the optimum tilt angle and the optimum surface ...
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1answer
49 views

Need advice on my simple solar powered lighting system

I'm building a simple circuit in which a solar panel will charge a 12 V battery during the day and then switch over to battery power during at night to light up a few bulbs. I'm using an LDR which ...
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0answers
21 views

charge controller not disconnecting at full

When testing batteries and charge controllers I stumbled into something, this is what I found: 12V 100A battery charged using solar system with a charge controller in between, at 13.4V or ...
2
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1answer
132 views

Is the intensity of light shone onto a solar panel proportional to its power output?

Is there a linear relationship between the two? I ask because I'm investigating the effect of a different variable on the power output of a solar panel, and intensity is meant to be one of my control ...
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2answers
90 views

Capacitor Configuration

The block diagram below is for a simple use of a solar array in conjunction with a battery, in a battery tied bus format. The diagram is simple and straightforward excepting the capacitor ...
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1answer
34 views

Two voltage rails from one photovoltaic system

I'm working on designing a photovoltaic well water pumping system. I will have two 12V 120W PV panels connected in series, for a 24V 240W output (during full sunlight). Is it possible to connect a ...
0
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1answer
35 views

Simultaneous operation of inverter and diesel generator in a solar system

I have a problem at one of my on-grid solar system project. There is a problem which lets the solar inverter on, when the grid is off and the diesel generator is on. As you know that, the solar ...
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2answers
153 views

what size capacitor do i need to replace 4 3.7v 2400mah batteries?

I have a 5v 2amp external usb battery back that dis/charges 4 18650 vape style batteries. Each is 3.7v 2400mah. I took out the batteries and placed a 35v max 4700 capacitor in its place.. charges in 5 ...
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0answers
20 views

Help with solar panel/battery & load calculations

First solar project and I've been researching for a couple of days but still struggling with some basics. Trying to set up a simple 12v system, maintained by a solar panel. Solar Panel> Charge ...
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1answer
49 views

Charging a 36V battery set with a 255W solar panel

I have directly connected a 255W solar panel (with Vmpp of 49.5V but can peak at 56V in full sun at mid-day) to the 36V battery set of my golf cart. This seems to have been working fine for months, ...
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3answers
113 views

Batteries for solar application, why C10 only? [closed]

Some Solar PV system integrators in India are insisting on using C10 batteries only, which they have named solar batteries. In my view the selection of battery depends on charging source , ...
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votes
1answer
83 views

Can I run a 110v battery charger/maintainer off a solar panel?

I have a Batt Cat II battery charger/maintainer hooked up to the batteries on my boat. I keep it at a storage yard that doesn't have 110v outlets available. I was wondering if it is possible or ...
0
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1answer
77 views

pulse charging lead acid battries effects and side effects

I am developing a solar charger which charges lead acid batteries.I would like to clear a few of doubts on this issue. I am using IR2110 gate driver for driving 2 n-channel mosfets in an half bridge ...
0
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1answer
56 views

Charging two batteries with one solar panel

I have two batteries connected in series. However, I'm using it to separately get +12V supply and -12V supply. I have a 24V rated solar panel, and was wondering if it's possible to charge the two ...
0
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1answer
61 views

Solar Panel Charging with Arduino

I built a solar panel charge controller from instructables with an easy to read schematic and for some reason my battery charges up to a certain point and then loses charge again. That leads me to ask ...
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1answer
59 views

How to connect 3x200AH Batteries in my 24V System

I have the following components in my system: 1- a 24V inventer 2- 2x130w 12V PV connected in Series 3- 1x310w 24V PV Connected in parallel to make a 24V system 4- a 30A PWM Charge controller. ...
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2answers
64 views

Solar Cell to DC-DC converter to Li-Ion charing module, is the DC-DC converter necessary?

I have the following components: 1W Solar Cell (5V at 200mA): http://www.ebay.ca/itm/291435192356 DC-DC Converter (2.5V Vin_min, set to 5V Vout): http://www.ebay.ca/itm/200983543561 5V Lithium Ion ...
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2answers
56 views

DC-DC & Solar Question

I normally am pretty good with electrics and they taught us about them in a few of my classes, specifically my into to engineering courses. I however don't know a ton about solar panels so this ...
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1answer
102 views

Solar panel strings: when does current flow via bypass diodes where each panel has a different maximum power point?

When having strings of 5 till 6 a-Si/µ-Si thin film PV panels and each panel its junction box is containing a BY255 by-pass diode, to make sure that current will flow in less optimal situations, like ...
0
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0answers
42 views

Industry standard for remote monitoring of solar power generation

I'm a software engineer and I'm working on the code for a small device that will monitor the electrical production of an array of power conditioners (grid-interactive inverters) for a set of solar ...
0
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1answer
71 views

Solar Cell - Preventing overcharge of an NiMH battery

I am trying to design a circuit and was wondering how to design it that the 12V 800mAH NimH battery I am using will not overcharge. I have researched trickle charging and as far as I understand, a ...
0
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1answer
55 views

Solar battery charger with load sharing

I'm looking to design a circuit around the CN3065 that will be solar powered with a li-ion backup battery. I've seen circuits that can achieve this by using a charge controller with a dedicated load ...
0
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0answers
37 views

Complex system circuit design and simulation

I'm building a solar powered GPS tracking device using an Ieik Mini Nano V3.0 Atmega328p microcontroller board (based on Arduino Nano), Adafruit Fona GSM module, Ublox NEO-6M GPS module. The GPS ...
0
votes
1answer
74 views

Charging Capacitor with Solar Panel

I have a 2.7V 100F super-capacitor. I am going to be charging it with a 6V 1W solar panel. Now the solar panel only puts out 6V when it is receiving the best sunlight so this means the output from the ...
0
votes
2answers
55 views

How to compute the charge of a required battery if I know average power usage of device

I have a device that operates on average 0.6 watts. I want to design a battery that will leave this device on for 17 hours straight. I know that charge(Q) = current * time. My device has an ...
0
votes
1answer
33 views

Boost Converter High output impedance

at no load my boost converter, will be the same as in the photo. I'm thinking without a load at the end of the boost circuit the output impedance will be very high which will make the potential ...
0
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1answer
43 views

How to assemble Solar panel part?

I want to built solar panel system and i rather to buy system parts and assemble them by myself, but i don't know the calculation : 1- How to calculate what kind of solar panel(How many Watt and ...
0
votes
1answer
50 views

Trying to determine battery size with a TI BQ25504

Currently I am trying to design a low power tracker in order to track cattle. I would like to implement a solar panel to keep the circuit powered. Through my research I found the Texas Instruments ...
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votes
1answer
79 views

Solar boost converter unstability

My design of a boost converter is the following Input: 40V/1.5A Output: 100v/0.62A Inductance used: 3.15mH Capacitance used: 220uF (rated 200V) diode switch used: IRF830 (rated Vds=500v) ...
2
votes
2answers
74 views

Mixing two or more AC sources to handle overload

Can I mix two or more AC sources to handle overload and maintain a stable voltage of 230V AC? For example if power from solar panel cannot handle a heavy load can I mix power from different source ...
0
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1answer
64 views

Solar Panel Boost converter (40v to 100V)

My project is to deliver the output of 200w solar panel (40v,1.5A)- very low because I am using lamps instead of the sun- to a load at a voltage level of 100v, after implementing the design of my ...
1
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2answers
64 views

Beginner - 3v 200ma Solar Panel Project

Just recently got interested in starting up a new project out of my area of knowledge. Basically I'm going to buy a 3v 200ma solar panel that I want to use to power a small light in one of the rooms ...
0
votes
0answers
51 views

Solar battery charger using MPPT?

I am designing a solar-powered battery charger, but I am currently having a problem with it. Here's the battery specs: 1.2V, NiMH, 2300mAh I'v read online that the safest way to charge a NiMh battery ...
0
votes
1answer
64 views

Boost converter for PV

So my two PV panels giving me an output of 40v, 1.5A. I am sensing both current and voltage of the PV output to give an MPPT duty cycle pulse. I want to boost the 40VDC to at least 400VDC and ...
1
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2answers
111 views

Is there a voltage buck converter which also boosts output current?

Application: solar USB charger. I have a 9V solar panel. I use a buck converter circuit to bring it down to 5V before going into the USB battery charging circuit. Exact components: ...
1
vote
1answer
71 views

Variable Current Lead Acid Battery Charging

I'm designing a solar controller in order to charge SLA batteries. I did some research on dedicated ICs that act as controllers, and found that most implement some sort of MPPT, in order to extract ...
0
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0answers
233 views

Incremental Conductance MPPT algorithm in MATLAB Simulink

I am simulating an application of the incremental conductance MPPT algorithm with a boost converter in MATLAB Simulink. The PV cell and boost converter have been modeled. I am facing problems while ...
-1
votes
1answer
79 views

solar Panel Calculations help required? [closed]

My father runs a solar company. He asked me the following question: A customer comes to me to ask for setting up a system that will help him use 10 bulbs each of power 10 W for 10 hours. ...
1
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2answers
129 views

Convert 3v solar cell to 1.5v

I recently bought a solar cell rated at 3v and 200mA dc to power a 1.5v dc motor that is used as an air pump for my aquarium.All the 1.5v solar cells available here have low ampere like 50mA or so. ...
0
votes
1answer
83 views

Current and voltage from PV ( LTS25NP , LV 25-P)

So in my design I am going to sense two PV panels in series ( Both voltage and current) to extract the Maximum power point (MPPT by arduino) so the input of both sensors will be the PV output and the ...
0
votes
1answer
86 views

Usb input current requirements for a power bank

My project is to take solar power from a 6w/6v panel, run it through a buck circuit tuned to 5v and charge one of the LiPo power banks. I perceive a buck circuit would do better at efficiency than a ...
1
vote
1answer
105 views

Solar charging using or not using a dummy (dump) load

I'm in the process of designing a small solar regulator / charger (no more than 5A) for sealed lead acid batteries. I have put a working prototype together and all seems to be working. However, ...
1
vote
1answer
135 views

What do I need to trickle charge rechargable batteries with a solar panel

Hi I have a chicken coop door opener that is battery operated. The batteries tend to run down every other month even though the thing is basically just a digital alarm clock with a stepper motor ...
0
votes
1answer
45 views

battery charging on solar panel

I have a single solar panel of 40 amps and I want to charge 12 volt 40 amp battery. How many such batteries can I charge on this single solar panel, and should I connect more batteries in parallel or ...