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.

Filter by
Sorted by
Tagged with
1
vote
1answer
68 views

Maximum Power Point Tracker (MPPT) charge controller - what drives the weight?

I'm having trouble finding any literature paper that studies this problem. What drives the weight of an MPPT charge controller? How would I go about reducing that weight if I had to design a custom ...
1
vote
1answer
46 views

Solar panel to battery, dc to dc converter question

I need to design an MPPT and the converter that uses it. the thing is: the Solar panel has a max voltage of 40V and the battery that is going to be charged is around 100V, the most easy thing would be ...
0
votes
1answer
69 views

DC converter use in solar cell MPPT

According to this project I saw many design use same principle by using MPPT to adjust PWM of buck converter. I totally get MPPT algorithms except the DC to DC converter part. Let's call solar panel ...
0
votes
1answer
47 views

Low voltage MPPT boost converter IC, constant input voltage

Following scenario: I have a bunch of Sunpower C50 unprocessed single solar cells. I'm trying to make a panel out of them for hiking. According to the datasheet each cell has 0.574 Vmpp an 5.65 Impp ...
0
votes
2answers
99 views

How to convert 240 VAC to 240 VDC [closed]

I have a few questions, namely: I aim to charge a 220 VDC battery pack with solar panels producing 240 VDC when open circuit using an MPPT charger. Where may I get such an MPPT charger? I'd like to ...
0
votes
1answer
58 views

MPPT buck converter vs Ordinary buck converter?

I’m building a small arduino project which is going to be powered using a small solar panel setup with a battery as it’s UPS for power backup during the dark. The setup is going to be like Solar ...
0
votes
1answer
85 views

overcharging issues in MPPT solar controller with NO output leads

My MPPT solar controller has no output leads. It contains only the (+,-)leads for battery and solar panel. Input is from the solar panel and output goes to battery.Therefore, I have to connect my load ...
0
votes
1answer
54 views

MPPT Reads Negative Amps

I have MPPSolar PCM5048 MPPT which is connected between the solar panels and the batteries. It was working well until yesterday as a sudden it reads negative amps on the battery current. it keeps ...
0
votes
0answers
38 views

Building a Wind Farm W/ Storage

If I am building small wind farm with storage with, what is the best configuration from the following scenarios? Scenario I [10 wind turbines - 3 phase AC, 2kW, and 48V output at full load]: Each ...
0
votes
1answer
114 views

Input/Output Impedance of DC/DC converters and Impedance matching

I am interested in understanding how do DC/DC converters achieve impedance matching for maximum power transfer applications. After visiting this entry, you can see in the "impedance matching" ...
0
votes
0answers
19 views

Help in using a const Voltage, const Current MPPT

I've bought this MPPT with a 12V solat panel & battery, to use in various outputs/ loads ( mainly ESP8266 projects ). Unfortunately very little documentation for this item. Found a more ...
0
votes
0answers
28 views

Is it safe to have two batteries in series on a solar panel system with 14.22v and 14.46v?

I have two batteries in series plugged to a solar panel system. In parallel they used to balance each other perfectly. But now i'm trying to have a 24v system and I have them in series. They ...
0
votes
1answer
52 views

What is the maximum voltage for MPPT/PWM to charge a X volt battery?

I currently have a PWM 12/24v (auto commute) with ~18V as input and a 12V battery in the output. I wanted to switch to 24V battery and I thought about going ~36v solar panel. (18V * 2) Then I saw ...
1
vote
0answers
77 views

Fitting a BQ24650 based MPPT charge controller to a permanent magnet generator wind turbine

I am investigating MPPT charge controllers modules for wind turbines. I came to the conclusion that my MPPT controller design investigations are more fitted to wind turbine MPPT than solar. I need ...
0
votes
0answers
41 views

Piezoelectric Energy Harvesting & rectifying

I am interested in doing piezo energy harvesting. I have bought two of these piezoelectric Harvesters. One device I found, the ΒQ25570 seems to implement mppt (maximum Power point tracking), and be ...
1
vote
1answer
37 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 ...
2
votes
1answer
51 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 ...
0
votes
0answers
82 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 ...
1
vote
2answers
377 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 &...
2
votes
1answer
292 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 ...
0
votes
3answers
97 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 ...
0
votes
1answer
70 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 ...
0
votes
1answer
41 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 ...
-1
votes
1answer
55 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 ...
0
votes
2answers
95 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 ...
1
vote
1answer
479 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 ...
3
votes
1answer
335 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 ...
-1
votes
2answers
346 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 ...
-1
votes
1answer
115 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 ...
0
votes
3answers
582 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 ...
0
votes
2answers
488 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 ...
1
vote
1answer
272 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. ...
5
votes
4answers
861 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 ...
1
vote
0answers
189 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 ...
4
votes
2answers
910 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 ...
0
votes
1answer
30 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 ...
2
votes
0answers
273 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: ...
3
votes
0answers
86 views

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 ...
2
votes
4answers
4k 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 ...
1
vote
2answers
3k 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 ...
1
vote
2answers
265 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 ...
0
votes
1answer
343 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(...
2
votes
1answer
2k 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 ...
0
votes
2answers
1k 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 ...
0
votes
0answers
570 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 ...
1
vote
2answers
610 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 ...
0
votes
1answer
663 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 ...
0
votes
1answer
43 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 ...
-1
votes
1answer
99 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 ...
0
votes
2answers
178 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 ...