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Questions tagged [mppt]

Maximum power point tracking is a technique that grid connected inverters, solar battery chargers and similar devices use to get the maximum possible power from one or more photovoltaic devices, typically solar panels, though optical power transmission systems can benefit from similar technology.

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Charging 12v 100 Ah AGM batter by Solar chatge controller

I have a 12v 100 Ah AGM battery.I need to charge this battery using my MPPT charge controller.I set the charging voltage to 13.5v.While its charging i test my battery voltage using my multi meter, it ...
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55 views

Buck converter - problem with connection or disconnection of battery

I am working on a buck converter from a solar panel to a battery, in order to do MPPT. It is a synchronous buck converter, with a 12 V battery for output. I am currently trying to make a prototype of ...
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826 views

Cathode to cathode diodes in schematics

I'm trying to understand the following circuits for an MPPT, and I do have some questions: Why there is a capacitor C6 in parallel with R2 for the voltage divider for analog reading, and how was the ...
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24 views

Designing an effective extensible solar cell + car battery setup [closed]

I've got a cabin that I visit on weekends and because I need to charge my computer and tools there, I decided to bring an old car battery and bought a solar panel to charge it. Right now I use a cheap ...
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114 views

Solar Li-Po battery charger with MPPT algorithm

I'm new here but I have read a lot of topics here about my question. I am designing a solar battery charger with MPPT algorithm but I don't know if I am doing it well. First of all my specs are here: ...
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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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4answers
411 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 ...
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523 views

MPPT without a battery

I have a device that pulls about 10 amps and is typically powered with a car battery. It runs fine with less amperage but needs 9 to 14 volts. I want to power my device directly from a solar panel but ...
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98 views

boost converter for ultra low power application

I want to design a dc-dc boost converter and manage power (MPPT) for an ultra-low power fuel which contains input voltage < 1 V and input current < 500 uA. if I choose simple boost converter, I ...
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1answer
164 views

How to model MPPT technique with PID controller

I need to model a MPPT algorithm with a PID controller at Simulink. The model will feed the gates of two mosfets of a push-pull converter. I have to extract max power from PV and have a fixed voltage(...
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1answer
299 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
349 views

MPPT charging a li-ion battery

I just designed this MPPT solar charge controller which outputs 4.2 V regulated via MPPT, it uses the SPV1040 IC. This will be used on a satellite with 4 side panels, each with 8 solar cells in ...
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201 views

Help designing a satellite MPPT board [SPV1040] [duplicate]

I'm in the process of developing a pocketqube and I am currently working on the power system. I am hoping to use an SPV1040 MPPT IC to simplify the design and maximize efficiency. Each side of the ...
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1answer
112 views

Limit MPPT solar charger output voltage

I have a problem with my mppt solar voltage regulator. I have a campervan with three 320 W solar panels (Voc 40.8 V, Vmpp 33.3 V) connected in series on the roof, and two 260 Ah, 12 V AGM batteries ...
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1answer
175 views

Is a MPPT controller basically a buck converter with a feedback geared towards power?

Conceptually, is a MPPT controller for charging (simple) batteries with energy from solar panels basically a buck converter whose feedback loop (which influences the PWM duty cycle) is geared toward ...
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31 views

Parallel 'Gang' Wiring Several Solar Panels

I need to connect 3 similar 180W solar panels to my MPPT. Each one outputs max 9A. I would like to send a + wire and a - wire for each panel back to either a bus bar or a fuse box... and then use a ...
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68 views

Solar and Batteries [closed]

I want to ask a few questions that relate to solar panels and the charging of batteries. I have looked all over the internet for answers but have not found anything that answers my concerns. The most ...
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2answers
72 views

Can output current of buck current more then input current?

I want to power a bulb from solar panel(17V/.9A) but due to low resistace (2 Ohm)of load i have to reduce the input voltage to 5.5V @ 2.75A for max power. I am using generic buck converter (not any ...
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1answer
147 views

Design a Li-Po battery charger with small solar panel and charger controller with embedded MPPT

I'm designing a small solar charger with these characteristics: SOLAR PANEL Voc = 5,65 V Vmp = 4,25 V (Voc -25% approx.) Isc = 250 mA IC CHARGER CONTROLLER STMicroelectronics SPV1040 High ...
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28 views

How can I make an MPPT charge controller with database to get information about changing irradiance levels and the best V for each state

New to programming, I'm working on an MPPT project. I want to use the P&O algorithm but the issue of instability bothers me. I believe if the controller can be made smart, it'll be able to pick ...
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132 views

MPPT charge control Project - LT3652

I am doing a Solar powered power bank as my dissertation project. It's based on LT3652 charge control, a Lithium-Ion battery (4500mAh) and 2 boost converters (3.3-5V and 3.3-12V). I am using a 21W, ...
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Need help to design inverter for 300watt solar panel

I have designed an inverter with PWM from Arduino and MOSFET bridge which is working from 12v, 20AH battery supply and converts it to 240v AC. Now I have bought a 300 Watt Solar panel with following ...
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1answer
116 views

MPPT Buck converter query

I am looking at prototyping a buck based MPPT solar cell system but am mainly confused by how the solar cell I-V characteristics are manipulated by the buck converter to give the optimum power to the ...
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2answers
90 views

The explanation of MPPT and its main function

I think the main function of MPPT is to find the max output power for us to let the power efficiency become the MAX. However,i am still not quite understand MPPT.Is MPPT a schematic or an algorithm?...
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1answer
77 views

MPPT Sunny Buddy (LT3652) + Solar Panel Voltage [closed]

I am having an issue using the sunny buddy mppt charger - The PV panels I am using give a voltage of 11-12V but when I connect the battery to the mppt, the voltage drops to 4-5V. Does anyone know ...
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69 views

Pso based Maximum Power Point Tracking

I am in trouble with MATLAB FUNCTION while getting V and I from block input and use it in FOR LOOP and output D for boost converter. I write a PSO based MPPT for a pv array in MATLAB FUNCTION block ...
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1answer
56 views

Cutting Power to Solar MPPT

I have an EPEver 3210A MPPT connected to my solar panel and a battery to charge. I'm initially experimenting with a small size battery (12V, 7Ah) before I upgrade. The MPPT pulls 100mA from the ...
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3answers
298 views

how to design circuit of high side MOSFET switching with bootstraping and mosfet driver ic?

Hey im starting to learn about MOSFETs at my university classes, but Im having trouble trying to design a circuit for a buck boost converter for a MPPT solar charge controller. The part pushing me ...
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3answers
955 views

How does a maximum power point charge controller regulate the charging current, when it always draws the maximum current from the panel?

I want to understand exactly how an MPPT charge controller works and all I could find is this: An MPPT charger is a DC-DC transformer, that when it lowers the input voltage, it raises the output ...
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50 views

How to tell difference in MPP voltage and current between one solar cell and two cells in series

I am working in a group to design a Solar car (for WSC regs 2017) and am in charge of a lot of the electrical systems. I am trying to decide how many Maximum Power Point Trackers (MPPTs) to use. The ...
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2answers
277 views

Boost converter for PV applications

I am designing a 18V to 24V boost converter with a solar panel as its input and a variable resistor at the load side for taking measurements. The boost converter will be doing the Maximum Power Point ...
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332 views

how do solaredge power optimizers work? Can I use them to charge battery pack directly?

When looking for some MPPT solutions for a solar car, one of the things I have considered were these wonderful small "Solar Optimizer" modules provided by SolarEdge. However, they are clearly intended ...
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1answer
42 views

How does MPPT algorithm and 2-stage battery charging go together?

I understand that for finding the MPP of a solar panel, the PWM of a switching converter needs to be regulated based on an algorithm. And that if a battery is connected to the converter the output ...
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48 views

Regulating load to find MPP

I'm trying to design an MPPT system for photovoltaic cells for a school project. As far as I understand I have to change the duty cycle of a buck converter to change the voltage of the PV so I can ...
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1answer
42 views

two MPPT tracker on the same solar panel string?

I would like to know if possible to use two distinct MPPT on the same solar panel string.
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545 views

Is the power from solar panel redirected to load when battery is full?

When the solar panel attached to a charge controller then to a battery, simply stops the charging when the battery is full or Is the charge controller(MPPT) smart enough to redirect the power directly ...
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166 views

Is there a maximum switching frequency for solar cells ?

I'm wondering what the frequency response of a solar cell is. Does a solar cell behave like a low pass filter e.g if i switch a load at 1 MHz, 10 MHz, 100 MHz ? Does the output power decrease if the ...
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94 views

Solar cell power output comparison without MPPT

I am interested in measuring the relative power output of a solar cell when it is placed behind glass and other materials. For example, one might guess that the cell's power output is reduced by 70% ...
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54 views

how to maximize voltage without using battery for 12v dc inverter

I set a system with battery 5 35ah 12 volt battery, MPPT and inverter to run A/C coller. It ran fine for short time, after 45 minute of use the negative side of the battery melted. Both the ...
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3answers
2k views

Circuit breaker trip timing

I'm a little unfamiliar with circuit breaker specs and confused by this circuit breaker datasheet: https://www.waytekwire.com/datasheet/46974.pdf On the second page, it says that it takes more than ...
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1answer
107 views

Possible to connect MPPT via the load distribution bus?

Is it possible to connect my solar charge controller (MPPT) to my load distribution bus? This would mean that the cables from the bus to the battery would transfer both the load current and the charge ...
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1answer
187 views

MPPT solar charger for Lead Acid Battery

I've seen plenty of good MPPT (or similar to MPPT) chargers for solar panels, but they all seem to be made for lithium based batteries. Here's an example of what I've seen: https://www.adafruit.com/...
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1answer
171 views

Is there a good replacement for the spv1020 DC DC boost converter with mppt?

I'm trying to design a circuit which can drive a load and/or charge a battery from an arbitrary voltage solar panel. In my search for this, I've found many references for circuits using the SPV1020 IC,...
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1answer
62 views

MPPT for a load whose operating voltage is nearly equal to the solar panel's open circuit voltage

Is it possible to implement MPPT for a load whose operating voltage is nearly equal to the solar panel's open circuit voltage. edit: Is it possible with buck converter alone?
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55 views

Can I get all the energy from a PV system if it is only hooked up to a CC and batteries?

What I mean is that I know a charge controller regulates the voltage and current into your batteries to protect them (and CC's can incorporate MPPT's to extract more from your solar panels), but do ...
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1answer
222 views

vehicle dynamo with MPPT solar controller

I have a 1930's car with a Lucas dynamo. Originally it was a 6 volt system but now 12v. This is done without modifying the dynamo. Unloaded, the dynamo voltage can rise to over 20 volts and of course ...
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2answers
178 views

Avoid current spike in buck converter

In image my model to simulate PV array & MPPT with buck converter . The result from this model have two problem: At t=T=1/f occur current spike in diode current and Vpv up above Voc. In battery , ...
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3answers
120 views

Is MPPT used with very small panels

Say for example an inexpensive solar calculator or other such similar device with what appears to be lets say a single 2.4V 6uA (microwatt) panel? Is an MPPT used to get the most panel rather than ...
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1answer
92 views

switch load depending on battery voltage

I have the following set up; simulate this circuit – Schematic created using CircuitLab MPPT charge controller: https://www.sparkfun.com/products/12885 Load: Raspberry Pi Zero Battery is: ...
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1answer
605 views

Type of Diode for Solar Panel

I'm a newbie that happened to make a home-made solar panel that outputs 18V and 6A without a load. I'm planning on charging a 12V battery bank through an MPPT or PWM. I've been researching what type ...