Questions tagged [solar-charge-controller]

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3answers
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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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1answer
227 views

solution to replace tlc2272cp ic

I am trying to bulid the following circuit that work as solar power charging controller. Unfortunately, I couldn't find IC1 named as TLC2272CP that works as dual low-noise rail-to- rail Operational ...
3
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1answer
4k views

Cheap PWM Charge controller not charging the battery

I recently got myself a CMG-2430 PWM charge controller(pretty cheap I know) and a 12v deep cycle battery. The problem is that the charge controller doesn't charge the battery when I connect the solar ...
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1answer
332 views

Need help in making an automatic battery cut-off switch

I want help in making a automatic cut-off circuit to stop charging of the battery when the potential across the battery reaches 13.3 Volts. The problem is that I want to cut-off the Solar panel from ...
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1answer
1k views

Precautions when connecting both an inverter and solar panel to AGM deep cycle battery simultaneously

I am a complete novice with batteries, inverters and solar panels / regulators. I have purchased a 130Ah AGM deep cycle battery, a 500W pure sinewave inverter and 2 x 100W solar panels with built-in ...
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2answers
1k views

Charging Li-Poly Battery with Small solar panel

I have Li-poly battery that is 4.2V 2000mAh with a protection circuit. I have solar panel that is 5V 250mA. The aim is to charge the battery to maintain a fully charged battery, so it really ...
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1answer
84 views

Connecting solar panel to a USB controller

I am a complete beginner in this area so please excuse me if my question is stupid (I am just starting and have a lot to learn). English isn't my first language so pardon me if I make any mistakes (or ...
3
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2answers
2k views

MCP73831: design a lithium battery charging circuit

I am trying to design a charging circuit for a lithium polymer battery with 2200 mAh capacity and 3.7 V nominal voltage. The integrated circuit for the control of the charge of the battery is the ...
0
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3answers
2k views

Calculate the charging time of a battery with a solar cell while the battery is being used.

I'm working on GPS tracking device and I need to know how to calculate how long it would take for it to run out of power. The unit is using drawing an average current of 5mA from a Lithium 3.7 V ...
2
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1answer
71 views

lock output solar panel if too few current

I use a solar panel which provide 12v-3W. I convert that to 5V using this converter. This 5V is used as input of a card which to charge a lipo battery and as a power supply for a raspberry zero. The ...
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2answers
2k 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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2answers
705 views

How do I determine solar panel amperage?

Complete newbie here guys so please bear with my question. I have bought 12W 6.6V solar panel that I will be using as phone charger. Beside that I have bought small USB solar controller which outputs ...
1
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1answer
136 views

Choosing solar panel - how many watts?

I have one solar related question, but please bare in mind that I am a complete newbie in this field so if my questions are stupid, I apologize. I want to use a solar panel with this USB controller/...
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1answer
155 views

How can I design a boost converter for a maximum power point tracking problem in a stand alone solar PV system?

Boost converter (or any dc-dc converter) connects PV array with load. MPPT algorithm modifies the duty ratio (of this converter) such that PV array is operated at voltage (or current) corresponding to ...
0
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1answer
791 views

Calculating a good charge current for 3s156p 18650

I have built a 3s 156 p Samsung 22p pack to use as a house battery in my van. I'm trying to find a charger for it. Currently I am using my balance charger tenergy tb6b. Here is a screenshot with the ...
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1answer
73 views

Simple Solar Setup question

I have recently purchased a 10W polycrystalline solar panel with 30A battery clips, a 20A solar charge controller (intelligent regulator with 12V/24V USB display) and a 12V 7Amp lead acid rechargeable ...
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2answers
315 views

555 Charge Controller Schematic Explanation

To preface, I am a relative beginner electronics hobbyist, and I have no experience reading schematics. I have been working on a home wind turbine, and I would like to use Michael Davis's charge ...
0
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1answer
2k views

One battery discharges faster than the other in my solar power system

So, I have solar power system and it is as follows: 2 AGM batteries each 100 Ah 2 solar panels, 24 volts, 250 watts each a controller an inverter the batteries are connected in series to give a ...
1
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1answer
2k views

Difficulty in understanding charge controller for solar and wind energy

I am having difficulty in understanding one control box which is used to charge the battery using solar and wind energy as well as power the load at the same time. I have attached the picture below ...
1
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1answer
167 views

How to calculate solar panel setup?

I have an equipment which draws 550W at a constant level, no peaks. I want to power this unit with solar cells only during the day when there is light using a simple car battery. Because I don't want ...
0
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1answer
5k views

Solar Charge Controller Function Details

I am planning to make this Solar Charge Controller: I would like to understand the way the components work to switch from charging to dumping and vice versa at set points. Note that the 555 timer is ...
0
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2answers
430 views

Solar panel system with as minimal reliance on the grid

I am not sure if this is the best place to ask, but I am trying to make a solar panel system which will charge batteries with excess energy and will be connected to the mains (i am going to try the ...
2
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2answers
9k views

How and when can solar charge controllers be stacked together?

I run a small business selling solar charge controllers. Often I have a problem with not having controllers rated high enough amp-wise. I know that charge controllers can be stacked. But can all be ...

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