Solar Power Manager Module (D), Solar Charge Controller USB, Supports 6V~24V Solar Panel and Type-C Power Adapter, 5V/3A Regulated Output, with Battery Holder (Batteries are Not Included)

I have bought a second one of these for more Meshtastic LoRa builds. I have a 10 watt, 5v panel that charges three 3000MaH Li-Pol batteries to full. This setup powering a RAK Wisblock, will last in low to no sunlight for over a week. It is recommended to run a 6 volt panel minimum, but my 5 volt panels keep it happy! I would recommend to anyone, the only thing that sucks is the slow shipping.

Great charge controller with all of the input and output ports covered

i'm using this connected to a 7 watt 18 volt solar panel. after many days of testing, it will not charge the 3 18650 batteries that are in the included battery tray connected to the solar charge controller. it is stuck at the 50% charge blinking led with 2 days of sun (with about 8 hours of the sun on the panel each day). the device connected is a heltec T114, which draws very little power throughout the day though the 5 volt output on the controller. so i would expect that the batteries get charged somewhat at the very least. but no go. update: i've since removed the batteries, charged them to 100% (4.18 volts) and placed them back in for testing. over 2 days, the heltec T114 has been sipping from the battery. but there has been no indication of the board even attempting to charge the batteries. at this moment, the batteries are down to 3.98 volts, and i have not seen the charging led light up once. power from the solar panel ranges from 7 volts under cloudy conditions to 22 volts in full sun. where is all this power dissipating to if it's not going to the batteries? update: found the problem. the terminal solar input is defective. i used the barrel connector solar input instead and it works as expected.

UPDATE Purchased May 2025 5vdc output quit June 29 2025, After troubleshooting and speaking with manufacturer, They sent a replacement and I have had no issue since. This device works as described and I will purchase again in the future. I am using this with 25watt solar panel to charge 1s4p 20amp battery pack for meshtastic solar node which is both high and remote. Excellent customer service.

Matched these to a 10W solar panel to keep 18650 protected lithium ion cells charged for IoT projects. Could probably drop to 8w solar panel or maybe even a 5w in some cases but these do a fine job with what I'm using. I haven't tried them with a Raspberry Pi but for LoRaWan with GPS and Bluetooth running it's more than enough power.

Stay away from that. It is completely useless. It barely charges (if any) in full tropical sun. I tried 1, 2 and 3 18650 batteries. At best it maintains with a single ESP32 Lora board connected, but I saw battery levels drop in full sun, on a 6W 6.6V panel. The really weird thing is that as soon as there is no sun, it drains the battery. I tried a super-low consumption RAK module and a higher consumption Heltec V3 (with battery and without battery). 12 hours of darkness and batteries are emptied to dangerous levels. So over-discharge protection is not working, and there is seriously something wrong with the board, as the 3 18650s should keep a RAK LORA module running for a week. Batteries are 3400 mAh, brand new protected batteries. It is completely useless.

It works great when paired with the waveshare solar panel. I use it to power esp32 running a tipping bucket rain gauge sensor over wifi and mqtt. Keeps the batteries charged for weeks at a time depending upon weather.

I put a set of Samsung INR18650-30Q cells in the battery holder. When I first attach the battery pack it shows status LEDs for 30 seconds. The li-ion battery pack is just 3 cells in parallel. It's probably prudent to use protected cells since there's no individual battery management. Attached to a USB C PD supply, it negotiated 9V, but since the pack was basically full only pulled a few watts. The current pack level LED blinks while the ones below it stay solid. I attached my phone. The output was 5V 2.82A. The battery status lights up, but has no other discharge indicator. The board gets noticeably warm. My infrared thermometer saw temps of 50-80C with the hottest part being the components near the 3.7V battery input, and the big central inductor marked 2R2. Has annoying blinking behavior when the battery gets low. The board is packed with connection options. Every input/output has a screw terminal option. You can feed power from the solar input, or the USB C. == Components == There's a lot of things on this board, but Waveshare already has most things outlined on their Wiki so check that out. Other things are mostly mosfets, and there is a WCH V003F4 (RISC-V microcontroller). A SWDIO (serial wire debug) interface for the microcontroller is exposed as an unpopulated 2-pin header.

Buonissima scheda per caricare batteria , la consiglio

Discharges the battery (without a load) if there's no sun.

works very well. Multiple connector options provides a very versatile connection for solar cell, battery and output, making it possible for connecting to different types of devices. Accepts solar panels with a vide voltage range. I bougt the first one for a solar powered wheather station. I liked it so much, order a second one just incase i have a future project. The price is right for the capability and the flexibility it offers.

Très bon produit permettant la selection automatique des sources ( USB 5 V , panneau solaire , sortie USB-c In & out ...) . Je m'en sers dans une boite extérieure pilotant des capteurs de mesure solaire, Particules fines, pression etc …) . Il dispose également d'un boitier permettant de mettre 3 piles 3,7 V de 4000 Ma lithium ref 18650 ce qui donne une autonomie correcte s'il le panneau solaire 10 W n'a pas assez de soleil. A commander TOP produit .

Very nice, works as advertised