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

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1answer
25 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 ...
0
votes
2answers
113 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 ...
0
votes
0answers
10 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 ...
0
votes
1answer
35 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, ...
0
votes
3answers
97 views

Batteries for solar application, why C10 only? [on hold]

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 , ...
0
votes
1answer
48 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
votes
1answer
52 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
25 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
votes
1answer
40 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 ...
0
votes
1answer
43 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
44 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 ...
0
votes
2answers
50 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 ...
1
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1answer
42 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 ...
-1
votes
0answers
64 views

How can I charge an 18V drill battery off of a 12v solar system

I have a small solar setup that runs on 12v. I'm interested in charging my 18V drill battery. I do have a power inverter, so I can plug the drill charger into the power inverter, but my concern is ...
0
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0answers
38 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
votes
1answer
47 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 ...
-1
votes
1answer
20 views

solar panel and different voltage rating fans [closed]

I need to connect a solar panel of 12V rating to a A fan of 24 v rating, which is of working range12-28v and Two fans of 12 v rating. Can I parallelly connect these 3 fans or do it need any ...
0
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1answer
34 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
votes
0answers
33 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
58 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
49 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
31 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
votes
1answer
41 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
35 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
69 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
69 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
votes
1answer
60 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
vote
2answers
58 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
35 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
60 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
vote
2answers
83 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
56 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
votes
0answers
109 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
75 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
vote
2answers
82 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
58 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
72 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
73 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
104 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
37 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 ...
4
votes
2answers
77 views

Heating a li-ion battery for use in sub-zero temperatures

I have a design that I'm working on that is to be outdoors year round, with a 1 watt solar panel trickle charging a 6 Ah li-ion battery during the day. I expect there to be about 3 to 4 months of ...
0
votes
1answer
36 views

Computing Power Requirement For Solar Setup

In relation to this question: Solar power wattage requirement I'm trying to get to the math of understanding my wattage for my plan solar-setup. I would like anyone here who knew can correct me on my ...
0
votes
1answer
32 views

Solar: Reason For Joining Batteries/Solar Panels in Series

I understand the concept of what happens when you do, but I do not understand the reason behind why some set-up require to double the voltage on the batteries, since the point is to store as much AH ...
1
vote
2answers
31 views

Understanding Battery Controller

I'm thinking of doing a small-scale Solar off-grid setup 1-2 80 Watt panels with a 12v 40Ah Deep Cycle battery. I have questions for those parts in another thread, but for now, my question is about ...
-3
votes
2answers
35 views

How could I power flexible oled screens with wearable power source and could I transmit data onto it with bluetooth via app [closed]

How could I power flexible oled screens with solar power and could I transmit data onto it with bluetooth via app? Would this be possible? please can you help thank you
1
vote
2answers
266 views

How to keep solar panel voltage at 24V?

I purchased a "24v" solar panel thinking it would output only at 24v, or less if there wasn't enough light. Immediately tested it, in indirect light it's producing 38V. Checked the label on the back ...
0
votes
1answer
64 views

USB charger with power bank charged from solar panel and peltiers

I would like to charge some batteries (maybe 1 lipo?) from either a 12V solar panel (about 300mA) or 2 peltiers (also about 200-300mA) in series (about 4V, but it’s really unstable and voltage changes ...
1
vote
1answer
49 views

MP3-25 flexible solar panel providing low current

I am working on a project where I need about 20 mA to come from a particular solar panel I am in possession of. The solar panel is an MP3-25 panel, I actually have 2 which I am trying to get to work. ...
0
votes
1answer
47 views

how to calculate solar panel size needed to run circuit

Iam doing a project and want to calculate what size solar panel to use to run my circuit. the only thing is that I have some size constraints involved cant be bigger and \$5\times5\$ in. I have a ...
0
votes
1answer
53 views

DIY power 230v filament bulb off grid [closed]

I need to power a 230v bulb off the grid via solar power. Typically, I would have solar panels that charges some 12v dry/wet cells. These cells will have to supply an inverter that would power the ...