Can I hook a solar panel to this?

A solar controller with +5v output is well advised, or alternately a 12v panel w/ 12v controller and then use a car 12v 1amp to USB converter.

I am considering connecting a solar panel to the charger. What is the maximum voltage the charger can tolerate?

The TP4056 chip on the board says in the datasheet a maximum of 8 volts can be applied to the chip. I don't have it on hand to check, but you can add the voltage drop of any components in series with the power input and T4056's Vcc. Example, if a reverse polarity protection diode with a drop of 1 volt was before the chip, the maximum goes up to 9 volts because after the diode, there is now only a 8 volt potential difference.

Will it cut the power when the battery reaches 3 volts?

Hi, Charging cut-off voltage: 4.2V ± 1%

What is the voltage on the Out pins?

about 5.1volts. I used these to power some Arduino Pro Mini projects using a single lipo18650 cell with good success. The output voltage is 5V regardless of input voltage or if it is running from battery. According to the chip datasheet you are not supposed to run a load and charge the battery at the same time but I had no problems doing so as long as the load was mild (<500ma).

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TP4056 Charging Module with Battery Protection 10pcs | 18650 Lithium Battery Charging Board, 18650 BMS, 5V 1A, Micro USB Interface

TP4056 Charging Module with Battery Protection 10pcs | 18650 Lithium Battery Charging Board, 18650 BMS, 5V 1A, Micro USB Interface

Product ID: 43833188

Details

Brand
MakerFocus
Color
Blue
Input Voltage
5 Volts
Item Weight
0.02 Pounds
Output Voltage
5 Volts

⚡5V input voltage

🔋1A max charge current

🛡️Over-discharge & overcurrent protection

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Description

🔌 Power your projects with precision and protection—because your batteries deserve the best!

DIY READY DESIGN - Extra input voltage pads make custom setups and projects a breeze for the tech-savvy pro.
BULK PACK ADVANTAGE - Get 10 modules in one set—perfect for scaling your battery management or prototyping needs.
BUILT IN SAFETY SHIELD - Over-discharge protection at 2.5V and 3A overcurrent cutoff guard your batteries and devices.
PRECISION BATTERY CARE - Smart cut-off at 4.2V ±1% ensures your 18650 cells stay healthy and long-lasting.
EFFORTLESS USB CHARGING - Micro USB input lets you power up with any phone charger—no extra adapters needed.

The TP4056 Charging Module is a compact, reliable 18650 lithium battery charger and protection board featuring a 5V micro USB input, 1A max charge current, and integrated over-discharge and overcurrent safeguards. Ideal for DIY enthusiasts and professionals, this 10-pack offers versatile connectivity and smart battery management to keep your power solutions safe and efficient.

Specifications

ASIN	B071RG4YWM
Amperage	1 Amps
Best Sellers Rank	#240,692 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,071 in Power Converters
Brand	MakerFocus
Color	Blue
Compatible Devices	Cellphone
Connector Type Used on Cable	Micro USB
Current Rating	1 Amps
Customer Reviews	4.6 4.6 out of 5 stars (533)
Input Voltage	5 Volts
Item Weight	0.02 Pounds
Manufacturer	MakerFocus
Mfr Part Number	TB41543514691F378
Model Number	8541549166
Number of Ports	10
Output Voltage	5 Volts
UPC	190033766643
Unit Count	10.0 Count
Warranty Description	No Warranty

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$17.04

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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TrustScore 4.5 | 7,300+ reviews

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