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

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.

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.

Works very well, I have prime and should be free shipping but shipping cost was added to the product price. For same money can buy on DFrobost at least you don’t have to prime membership.

I bought this to control my 5v solar panel and battery charging for my Meshtastic device. So far this has been excellent at keeping my 10k mAh battery charged. Not only does it do great at charging in low light, the built in safety features are worth it as well.

Just fabulous and worth every penny.

I use these to power solar Meshtastic LoRA Nodes. I have a 5v6w solar panel and 3 21700(4500mAh) cells in parallel. Output to the Meshtastic node. It has been up on my tower for 3 weeks and it has kept the batteries fully charged even during sub freezing Temps and multiple days of cloudy conditions. Very happy with the DFRobot controller. I have bought 6 of these now and would buy more.👍

Be aware: this company uses a crowd-sourced forum documentation model and does not provide any actual instructions or information beyond the datasheets. I am having to use trial-and-error to get the device to work, which thankfully has not destroyed any of my electronics nor burned any li-ion cells yet. It appears to be a good device but I have yet to determine if it will work for my use-case. I will source my solar controllers elsewhere after using this one, successful or not.

My only complaint is why didn't DFRobot make the boot switch usable via an external set of pins? Now whenever the battery fully dies I have to open up the device it's embedded in and try to press that micro button before it will work again. Which means I also have to design the mounts so that I can reach that tiny button when I inevitably will have to press it. The ability to turn off and on the 5v pins via the EN pin is a great feature, but the it would be nice if the USB port's always on power could be connected though a set of external pins (so that it can also be wired to an external on/off switch). A jumper that could disable all the LEDs on the board would also be nice. An onboard voltage divider connected to the battery leads with an external output pin would be a great edition so that we can check the battery voltage via an Arduino's analog pin easily. (my guess is that this already is available somewhere in that circuit already there's just no external access to it) Hopefully some of these suggestions make it into version 1.2 :) (which I will also purchase)

This was exactly what I was looking for but didn’t want to wait for shipping from AliExpress for a fraction of the price.