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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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Do we need MPPT in grid synchronization and string inverters? [closed]

I have two questions regarding the MPPT grid synchronization. I have seen that it takes a few minutes for the inverter to get synchronized with the grid. I want to ask that does the inverter first ...
kam1212's user avatar
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5 votes
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How does MPPT maintain a constant voltage?

I have a slight confusion in the working of the MPPT algorithm in solar inverter. I am confused about how this converter maintains a constant 310V (required for H-bridge) with MPPT. MPPT is a maximum ...
kam1212's user avatar
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Difference between MPPT charger and MPPT boost converter

I am quite confused regarding the MPPT charger and the MPPT boost converter. I have a hybrid inverter where I have a boost converter circuit at the beginning with inputs from the PV. The output of it ...
kam1212's user avatar
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1 answer
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Circuit design for adjusting the electrical load of a small wind turbine (MPPT)

I am trying to make an MPPT controller for a small homemade wind turbine. The goal of the project is the MPPT itself and its performance. The application is direct water heating, and there are no ...
leheim's user avatar
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3 answers
117 views

Driving a P-channel MOSFET with high voltage input

I designed a buck converter as an MPPT charger using high side switching. It seems the signal on the gate of the MOSFET good. If a solar panel with low voltage like solar MPPT 18volt there isn't a ...
freeman3020's user avatar
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47 views

Low Solar Panel Voltage Vmp Operation

so I'm currently working on an MPPT project using Asynchronous Buck Converter with the design : Capacitor Input : 470uF/100V Capacitor Output : 1000uF/100V Inductor : 65uH fsw : 39khz current : 30A ...
tabun's user avatar
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1 answer
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Is this solar circuit connection OK?

My inverter requires a 96v battery input and my MPPT solar charge controllers have a maximum battery voltage of 48v, so I connected them together like this: Is this a bad connection? If yes, what is ...
GuruKay's user avatar
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Parallel solar charge controllers

I need to charge a 12V LiFePO4 battery and to get full benefit from my 50W solar panel I need a bit over 4A charge current capabilities. I've looked through MPPT charge controller ICs and there's the ...
davegravy's user avatar
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1 answer
60 views

MPPT controller or charger into battery mangement IC?

Is it possible to add an MPPT controller (or charger?) upstream of a battery management IC that lacks solar input, as a means of supporting a solar power source? I'm finding battery management ICs ...
davegravy's user avatar
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Limiting the battery charging current / voltage using PWM or MPPT charge controller

I have a 12V, 200Ah lead acid tubular battery which I charge with solar panels using a PWM or MPPT charge controller. PV array specs are: ...
Irfan Latif's user avatar
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121 views

Connecting solar cells directly to battery

I'm building a solar powered RC plane and need to design a power system to deliver power from the solar panels to the battery and motor. I have an array of 38 C60 solar cells outputting 22.8V (0.6*38),...
Dorphen's user avatar
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1 Solar panel to 2 mppt, to 2 separated batteries

In my motorhome I have 1 solar panel (500w) to a one victrom mppt 30A, to one battery 100A of lifePo4. Now I need more battery because i have a new 12v fridge, so I bought other battery 230A lifepo4, ...
Neme Hdg's user avatar
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1 answer
49 views

Battery charging algorithm

I have designed my MPPT battery charger to a state and I have been able to generate the 14.4V charging voltage, with the 40Ah battery charged upto 14.4V during bulk charging stage and absorption mode ...
Peace's user avatar
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2 votes
1 answer
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Charging li-ion 72V with solar MPPT controller [closed]

I have an EV 72V li-ion battery with given charger (peaks at 11 A). My MPPT solar charger is designed among other types for li-ion up to 96V ie 12/24/36/48/60/72/84/96V settable at 72 V. 50 A max. ...
x y's user avatar
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Is a charge controller supposed to first generate a voltage of 14.4V, before the battery is connected to start charging?

I am trying to design an MPPT charge controller based on an interleaved buck converter. Per my design, I use the present panel voltage to compute the duty cycle that first outputs 14.4 V which is ...
Peace's user avatar
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Boost mode doesn’t work properly for a syncronous non-inverting buck-boost converter

I posted a related question 5 days ago. I fixed the capacitor position the same as the datasheet recommendation of the gate driver by making it connect Vb with Vs, also the one who answered my ...
loa rifa's user avatar
1 vote
3 answers
91 views

Why is the output current of the solar cell still continuous when using a buck converter for maximum power tracking of a solar array?

This is an PSIM example using buck converter to do MPPT: My question is that since the solar cell array serves as the input source of the buck converter, according to the discontinuous ...
T L's user avatar
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1 vote
3 answers
189 views

MPPT Solar Panel Schematic

I've been looking at a few MPPT schematics, and I'm confused about the operation. The point of MPPT tracking is to extract the maximum amount of power from the solar panel, which means controlling the ...
BeB00's user avatar
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CV state lead-acid battery charge from solar panel

I simulate the charging of a lead-acid battery, using MPPT algorithms, Buck converter, a PID regulator and a solar panel. In the CC stage everything is perfect. The battery is charged up to 14.4V, so ...
vsa's user avatar
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Are there MPPT solar chargers that can also do coulomb counting/current measuring or is that a separate function? (for NiMH)

Are there any MPPT solar chargers that can also do coulomb counting, or do you need a separate fuel gauge IC for that? I have been looking for a while and there is no proof that an IC even exists that ...
Matthew3302's user avatar
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1 answer
97 views

Photovoltaic cells and CC load

Hello! I am newbie in photovoltaic electronics and recently learned about MPPT. In my project load needs constant current. Does constant ...
Erch's user avatar
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1 vote
1 answer
120 views

Looking for ways to combine the power outputs of different renewable energy sources

I've been researching ways of combining the outputs of different renewable energy sources (e.g. solar panels and DC rectified wind turbines) to provide a single output that could then be connected to ...
formerlolz's user avatar
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1 answer
479 views

MPPT bulk charge voltage vs sealed lead acid battery fully charged voltage

I could do with some help making sure I understand some MPPT battery charging fundamentals. Been reading up on this but can't find anything that has made it 100% clear for me. An unloaded, fully ...
formerlolz's user avatar
1 vote
1 answer
253 views

I'm trying to make a Zeta converter

I tried to design Zeta converter to be used in an MPPT charge controller. VIN: 10-22 V IIN: 3 A Fs: 30 kHz I have a problem. With my design, the voltage is not coming out so well and nothing changes ...
tabun's user avatar
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0 answers
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Switching Parallel Solar Cells

I have a proposed solar system setup where sometimes one set of panels will be covered. The system has control over when the panel is covered or not. I'm thinking of ways to isolate the covered cells ...
BeB00's user avatar
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1 answer
173 views

Multiple MPPT (Parallel)

We are developing a system with multiple MPPTs connected in parallel. Now I have 2 separate MPPTs based on the Genasun GVB-8 only working if I combine them together then I get backflow current and my ...
Jasper's user avatar
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1 vote
1 answer
101 views

Problem turning on low power (TPS709) to MPPT (ATtiny85) after dawn

I have a relatively low-power autonomous device, which will be left untouched for weeks or months. Solar recharging is therefore very important. Maximising solar power for overcast days is also ...
Christopher RH's user avatar
2 votes
3 answers
278 views

How does applying an MPPT algorithm on a buck converter result in maximum current into the battery?

When an MPPT solar charge controller —in my case, based on buck topology— is charging a battery in constant current (CC) mode, the MPPT algorithm is applied to find the PV panel voltage (or input ...
xrosaber's user avatar
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How do I test for solar irradiation variation from 400-1000 W/m2?

I am new to the field of power electronics. I model maximum power point tracking perturb and observe algorithm with a buck-boost converter. I want to test for various solar irradiance, please how do I ...
Love's user avatar
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1 vote
2 answers
178 views

Is it possible to pair MPPT/PWM charger with a computer UPS? Would it prolong the UPS battery's lifespan?

I've an old UPS for my computer which draws 50 W on average and less than 150 W at full load. With the the built-in battery I only have about 10 minutes of backup time. I am thinking about getting a ...
Pyi Soe's user avatar
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3 votes
1 answer
190 views

I have a schematic where the bases of two transistors are connected with each other. I don't understand how it is supposed to perform any function

I'm reverse engineering a MPPT charge controller. I looked at its PCB and I drew the schematic from it and I've been as thorough as I can (checking and cross-checking many times). I know the "...
xrosaber's user avatar
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0 votes
0 answers
45 views

Boost converter - Different value for change in duty cycle causing oscillations and sub-optimal performance

I'm trying to simulate an MPPT system in Simulink. The algorithm is working fine in hardware, but when I'm simulating on Simulink I have an issue. When I change the value of delta duty_cycle (i.e. the ...
Dark Sorrow's user avatar
1 vote
0 answers
66 views

Why does solar current drop when charging a battery with a MPP controller?

I'm trying to build a model using a PV panel to charge a battery (a buck converter in between). I use a MPP controller to track the maximum power point. The solar irradiance and temperature are set as ...
Karenokaren's user avatar
4 votes
6 answers
3k views

How is the output of an MPPT solar charge controller connected to a battery?

I have some confusion about how the output of an MPPT solar charge controller should behave. In my head, I'm thinking of a perturb and observe system where the output should oscillate around the ...
Microcontroller Enjoyer's user avatar
2 votes
5 answers
1k views

How does a buck converter maximize the power in the MPPT system?

How can a DC-DC buck converter be used to maximize input power in an MPPT system? I know that an MPPT system consists of a processor that reads the power source and manages a buck converter to ...
Barry Allen's user avatar
0 votes
1 answer
109 views

Would an MPPT module that charges Li-po batteries work with a NiMH battery?

I'm trying to charge a 9 V, 300 mAh NiMH battery with a 6 V solar panel using a 12 V MPPT module for which the description says it's for Li-po batteries. Would it work with NiMH batteries?
Lord Voldemort's user avatar
0 votes
1 answer
46 views

MPPT SMD diode identification

What kind of diode is this (marked with D35)? It is from a MidniteClassic 150 MPPT.
Wellingtone Olonyi's user avatar
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1 answer
149 views

Design of a high voltage system for solar car using MPPT with batteries and motor controller

We are planning to make a system that can run a BLDC motor and charge a battery with a PV array using a boost MPPT. Current aiming spec on output side: Nominal voltage 96V. I am nt sure if there are ...
soccernismo's user avatar
0 votes
2 answers
818 views

How can I keep the output voltage of my MPPT buck converter in my PV system constant while connected to the load (battery)? [closed]

I've designed a PV based solar charger controller using the MPPT algorithm to charge my 12 V tubular battery for a DC load. I need to keep the output voltage constant at 14.5 V to connect a 12 V ...
Suraj Sashtri's user avatar
1 vote
1 answer
163 views

MOSFET is not turning on in bidirectional power switch circuit

I am designing an MPPT circuit using bidirectional power switch(as load switch)having two PMOS connected back to back and both the MOSFEts are driven by BC847 transistor that is being driven by a ...
John Mist's user avatar
2 votes
0 answers
505 views

MPPT charge controller with resistance/inductive load and no battery?

The most popular application of solar MPPT is for battery charging. There is a big market for these MPPT charge controllers (of varying quality and power specs to be sure) and they are available for ...
saucerful's user avatar
0 votes
1 answer
211 views

MPPT solar charge controller - battery charge current at MPP

I am currently planning to design an MPPT solar charge controller and I am trying to follow a reference design from TI - TIDA 010042. I am planning to use arduino as the microcontroller for this ...
fedi makni's user avatar
0 votes
0 answers
115 views

MPPT current limitation

I started to work on an MPPT project a couple of months ago. I have the first HW prototype (synchronous buck converter, current/voltage measurement, STM32 uC) and I am still fiddling with the SW side. ...
Lowrdson's user avatar
0 votes
3 answers
76 views

Photovoltaic solar cell attached to load device

I am new to the field of power electronics so please bear with me. From what I understand, photovoltaic cells are often connected to a DC/DC converter and a MPPT power system that allows for (1) ...
Dr. Ernesto Chinchilla's user avatar
1 vote
1 answer
201 views

MPPT input current measurement

I am currently working on building an MPPT, in a synchronous buck configuration. The HW side is almost done, I am still figuring out the current measurement and doing some tests to see how current ...
Lowrdson's user avatar
0 votes
2 answers
60 views

If we change the PV panel, should we also change the MPPT controller block?

I have 6kw PV panel, in case of partial shading it's capacity reduces to 3kw. But, the MPPT tracker I designed it specifically for that 6kw rating, now because of partial shading the same MPPT tracker ...
Macroeng's user avatar
0 votes
0 answers
184 views

How to calculate efficiency of an MPPT Algorithm

My PV system with an MPPT algorithm is extracting about 97% power of the Maximum power that can be extracted from the panel. However, the matching of the load through converter did not happen as ...
Jansen's user avatar
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75 views

How to asses the performance of an MPPT algorithm?

I have a standalone pv system with PV Panel rating 6820W, a buck converter, 12V battery , DC resistance (load) of 8 ohm with Perturb and observe (P&O) as the control algorithm. Upon simulating, ...
Macroeng's user avatar
0 votes
0 answers
88 views

How to calculate the maximum load that a standalone PV system can handle?

I have a 6820W pv panel, a boost converter, a H-bridge inverter, a 48V 540Ah LI-ion battery, a 100ohm dc and a 100ohm ac load in my system. My question is what is the maximum load that this system can ...
Macroeng's user avatar
0 votes
0 answers
68 views

Plugging an MPPT controller into another MPPT controller

I am installing a CTEK D250SE charger into my camper trailer. The D250SE contains an MPPT controller for charging from a regular solar panel. The catch is that my existing solar panels already have an ...
Mark Henderson's user avatar