if no power is going through the solar panel, can this be set to automatically turn on? In other words does the 5v auto turn on when it gets dark?

It automatically turns on when power is supplied from the panel. In the interim it draws from the battery.

How do i mount the cooling fin? is that what the 3m tape is for? and i it suppose to have direct contact?

That is a good question. I didn't put on my unit and it is working fine.

what is the minimum voltage from solar panel needed? my location is partialy shaded so I get 5.5 in direct sunlight in morning and 3.5 in afternoon

The minimum voltage required from the solar panel is 4.4-6V. In your case, you could connect a 3.7V Lipo battery at the BAT IN side. When the sunlight is not strong, the device can be powered by the lithium battery. When the sunlight is intense, the solar panel can power the device and also charge the lithium battery.

Open circuit voltage is 7.2V operating is 6 volts on my solar panels will this work with solar power manager 5 volt 6 volts max

I had a little trouble with one of mine that had open circuit voltage above 6v. I opted for installing a step down circuit to drop it to 5v and it works like a champ.

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900mA MPPT Solar Panel Controller - Solar Power Manager Module for 5V Solar Panel - Support Solar Charging and USB Charging

900mA MPPT Solar Panel Controller - Solar Power Manager Module for 5V Solar Panel - Support Solar Charging and USB Charging

Product ID: 739906829

Details

Brand
DFROBOT
Color
Item Weight
0.07 Kilograms
Material
Aluminum
Voltage
5 Volts

⚡900mA max charging current

🔋MPPT tech maximizes solar efficiency

🛡️Multi-layer battery & output protection

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€ 59.14

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Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔆 Power your future smartly — never miss a ray!

DUAL CHARGING MODES - Seamlessly switch between solar and USB charging with up to 900mA current to keep your LiPo battery powered.
ROBUST SAFETY FEATURES - Comprehensive protections guard against overcharge, overdischarge, overcurrent, and reverse polarity—ensuring your battery’s longevity.
COMPACT DURABLE DESIGN - Lightweight aluminum build with thermal management components fits perfectly into any sleek, modern solar setup.
STABLE 5 V OUTPUT CONTROL - On/off controllable 5V 1A DC-DC converter powers your low-energy IoT and solar projects with precision.
MAXIMIZE SOLAR POWER OUTPUT - Advanced MPPT algorithm extracts peak energy from your 5V solar panel for unbeatable efficiency.

The DFROBOT 900mA MPPT Solar Power Manager V1.1 is a compact, high-efficiency solar charge controller designed for 5V solar panels and 3.7V LiPo batteries. Featuring maximum power point tracking, dual solar/USB charging modes, and comprehensive battery protection, it delivers up to 900mA charging current with stable 5V output. Ideal for IoT devices, solar robots, and small solar lighting projects, this module ensures safe, optimized renewable energy management in a durable aluminum package.

Specifications

ASIN	B07MML4YJV
Amazon Bestseller	#791,274 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #2,112 in Solar Power Generation Equipment & Components
Brand Name	DFROBOT
Color	Brown\|Green\|Black\|Yellow
Customer Reviews	4.5 4.5 out of 5 stars (113)
Display Type	Software
Item Weight	0.07 Kilograms
Manufacturer	DFROBOT
Material Type	Aluminum
Model	DFR0559
Part Number	DFR0559
Unit Count	1.0 Count
Voltage	5 Volts

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