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The DFROBOT 900mA MPPT Solar Panel Controller is a compact, high-efficiency solar power management module designed for 5V solar panels. Featuring Maximum Power Point Tracking (MPPT) technology, it maximizes solar energy harvesting while providing up to 900mA charging current for 3.7V Li-ion batteries via solar or USB input. Equipped with multi-layer safety protections and a regulated 5V 1A output, this module is ideal for smart solar IoT devices, solar-powered robots, and portable solar projects, ensuring reliable, safe, and efficient power management.
| ASIN | B07MML4YJV |
| Brand Name | DFROBOT |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (111) |
| Item Weight | 0.07 Kilograms |
| Manufacturer | DFROBOT |
| Material Type | Stainless Steel |
| Unit Count | 1 Count |
| Voltage | 5 Volts |
J**S
I'm using this to power a MeshCore repeater. On the MPPT side of things, I checked it after a day of operation and it seems to keep the 18650 batteries (wired in parallel) close to 4.2v using a small 5w pannel. On the output power side of things, the regulated 5v measures at 5.11v (on both output USB and pins) and didn't dip while under test, so it seems to keep up with power demand just fine. I was not able to detect any noise on the 5v output using my Xminilab oscilloscope, but I put a 1F capacitor on it anyway to reduce the possibility of signal interference. When I first plugged in the battery, I noticed that it powered on by itself (desirable for this use case). When I later unplugged the battery and plugged it back in, I had to press the "boot" button get the output going again. I hope this is not a button I have to press in the scenario where the batteries fully discharge and charge up again. Time will tell.
A**R
This was exactly what I was looking for but didnโt want to wait for shipping from AliExpress for a fraction of the price.
C**S
Worked well for what I needed. I used this for a solar project for my son. It has all the connections that you would need and is very well made. Good price for a good item.
P**L
Good product, works as advertised. Fully charges the battery from solar, and the reverse indicators are nice to have, just in case. Only con is that if the battery fully dies, the circuit won't restart outputting power to the load. It will recharge the battery, but I have to disconnect and reconnect the load in order to get power to flow again, which is obviously not ideal for applications where the circuit is less accessible. Paired with a large enough battery though, this shouldn't be a concern.
C**R
Purchased this on June 5th, 2025 for a solar powered weather station. Little over 3 months later, this is dead. Will not operate even if I plug in 5c USB cable into it. I could understand if this was 2-3 old but 3 months? Update: I am changing my rating as I was sent a replacement. Good customer service.
Trustpilot
5 days ago
1 month ago