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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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34 views

Cable length and voltage drop in offgrid solar installation

I have connected my Lithium-ion battery pack(11.1v 100ah ) with my Epever MPPT charge controller using 5M length of 8 AWG cable. when i put load which consume around 12A , the charger controller shows ...
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42 views

Solar panel and power bank

I would like to charge a 20,000mAh power bank with a 18V 20W solar panel. The power bank has 8*18650 batteries in parallel. I came out with 3 options. The first one is to use a buck DC-DC converter ...
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67 views

Chossing P channel mosfet. Inverter modification for better battery management

I have a Victron 75/15 MPPT that you already know allows the control of the flotation, bulk and cut-off voltage at the output, configured using ve.direct. I also have an old (much) Victron 24V/350W ...
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51 views

MPPT controller with battery management system

I'm trying to create a little solar charger with backup battery for my Arduino. I would like to use a MPPT controller for the solar panels. I found a few solutions like the IC CN3722, but all of these ...
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75 views

How to tell if a solar regulator is MPPT or PWM

I have a solar cell charging a 12v battery via a maplin TPS 1230 solar charge regulator. By using some basic instrumentation and some simple maths (i.e. measuring the current and voltage on the input &...
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61 views

How does an MPPT charge controller control the input voltage?

I understand how buck/boost converters change the output voltage, but how is an MPPT converter able to control the input voltage/current while keeping the same output voltage? I understand the theory ...
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90 views

What would be the most efficient way of wiring a solar power bicycle?

I have an electronic bicycle; 350 motor that runs off a 17.5 Ah battery at 36 volts. I've just ordered three 12 volt, 150 watt solar panels, that I'll wire in series to total 450 watts; giving 12.5 ...
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64 views

how the battery behaves in this diagram

My question is this. I'm using this ic mppt SM72445 along with a 250 watt solar panel, mppt output configured to 50.4 or 51 volts, 12-cell lithium-ion battery pack and bms, if the load is less than ...
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32 views

Drawin max power out of solar panel by keeping its voltage constant

I wanna build a simple MPPT that keeps voltage on output of the solar panel constant. According to documentation, maximum power is drawn, when output voltage is about 4.2V. My way of reasoning is like ...
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42 views

How should a load be connected in a configuration of a MPPT solar charger and a LiPo battery?

I am designing a circuit for MPPT solar charger SPV1040 which could charge a single-cell LiPo battery. I am using AN3319 and AN4050 application notes for reference. I also want to connect a load ...
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73 views

MPPT lead acid over voltage

As I understand it, an MPPT algorithm adjusts the charging voltage until it finds the point where maximum power is delivered into the battery. If a 12V lead-acid battery is used, is there an upper ...
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188 views

Measuring current from solar panel using an arduino?

I am designing a MPPT buck converter and bought ACS712 30A arduino current sensor and it is awful. Not accurate at all. so I find two configurations circuits that might help find an alternative to ...
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99 views

Different Wattage Solar Panels for Home [different Voltage/Ampere]

My current solar system for home 12V 100W polycrystalline Solar Panel. 12V 75Ah Lead Acid solar tubular Battery. PWM 12V 10A Solar Charge Controller. 12V Input and 200VA Output Inverter. Current ...
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114 views

Using IR2110 driver in synchronous buck converter?

in using MPPT charger for battery, can use a variable input- fixed output voltage regulator that will be connected to the solar panel input?, this way I can have 15V for VCC and 5V for VD. I really ...
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76 views

Bootstrap cap value and how it relates to fsw and duty cycle?

I am designing a synchronous buck converter with mppt. I have a question about the bootstrap capacitor value. Knowing that the duty cycle and fsw are dependent on this value. What is the best approach ...
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36 views

Solar panel voltage with buck converter and mosfets?

If the input voltage of the solar panel as Vin in the picture below. if Vin is in the range of 10 V to 37V.The average voltage value in the node in yellow during switch 1 is on and switch 2 is off is ...
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138 views

driving high and low side mosfet for synchronous buck converter?

I am designing an MPPT charge controller. I have chosen my MOSFETs to be both NMOS https://www.sparkfun.com/products/10213 (FQP30N06L) 60V, 30A. Since the gate voltage is 3 to 5V. I can drive the low ...
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211 views

Can I use a MPPT Solar Controller to charge my auxillary 12V AGM Battery from the car battery/alternator?

I have a RedArc solenoid and a Victron 75/15 Smart Solar Controller. Can I use the combination of these two units to charge an 12V AGM Deep Cycle auxiliary battery from the car battery/alternator ...
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120 views

Is MPPT of PV array possible if only converters are used and the connected load is a battery?

I am currently working on a project to harvest energy from solar PV panels. There are some difficulties that i am facing. I was able to achieve mppt using a constant resistive load with a converter. ...
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636 views

Achieving MPPT of a solar panel with LM2596

im having some trouble with DC converters in a solar system. I have a solar panel of 21V (Voc) and 1.33 (Isc). I have studied that with a DC buck converter with input regulation (Feedback loop taken ...
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100 views

Can multiple microinverters, connected in parallel to a single source, become unstable?

Just to get this out of the way, I realize that what I'm exploring is well outside the design specs for the hardware I'm using. Now that that's out of the way: I have a large lithium battery module ...
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856 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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29 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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218 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
2k 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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2answers
2k 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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2answers
179 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
288 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
877 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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637 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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418 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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350 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
356 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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39 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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95 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
125 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
255 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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32 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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79 views

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
144 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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102 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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91 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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1answer
79 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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497 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
1k 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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2answers
485 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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2answers
495 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
43 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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54 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 ...