Hi
I’m planning to use an ESP module outside for environment measures (temperature, humidity, spped wind…) and so would like to power it in Solar mode. I have a solar panel giving 6V/3W at best. I have a little TP4056 module to charge 18650 battery with solar panel. Question is: Can I wire in parallel with the output of the charger module on the battery a voltage regulator to power my ESP ?
Thanks
Vincèn
sounds just like http://www.instructables.com/id/Solar-Powered-WiFi-Weather-Station/
the TP4056 is used and a diagram for wiring it up.
Thanks for link, sounds exactly what I was looking for but it looks like there are multiple versions of TP4056 boards no ??
Mine I don’t see the output connector on it to power my ESP ???
Here’s how I’m doing my solar panel to provide power for a NodeMCU that controls a servo working on a blind.
Thanks for the share but that design is too basic so might not last the much ! You use charger energy to supply the voltage booster too which is not good ! Did you see the wiring described in link above ? http://www.instructables.com/id/Solar-Powered-WiFi-Weather-Station/ This one is good 
I’ve had no issues whatsoever with this wiring setup. Working perfectly for what I’m doing with it.
Jonathan, I have been looking all over the place for this information. In theory I have the same setup as you. A solar panel charging a battery 18650 powering a nodemcu and a servo to open/close the blinds. Everything works fine when I plug it to an USB power supply but when I plug it to the battery then I have all sorts of problems. Would you please let me know more details of your setup? Like the voltage booster part number. Do you have more pictures of your rig? I would appreciate your help. Thanks in advance
Apologies for the slow response. Turns out I wasn’t receiving the notifications on comments.
Ok, on to the project. I too have had some recurring issues with the solar/battery setup. After quite a bit of research it looks like the solar panel I was using is incorrect. At first I was using a 5v 60ma .3w panel but I have no ordered (and received) a 5.5v 120ma .66v panel that might fix things.
I’m going to have to test this all of course but the somewhat expert advice I got told me this was a better option.
I’ll get all the parts out this weekend and send through their exact details to assist.
Again, so sorry for the delay in responding
If you could make a separate topic in the Hardware/Show us your project section I’m sure a lot of people would be interested in this!
I certainly am anyway! 
No apologies necessary. I appreciate your help with this.
Thanks,
Xavier
Ok, I went back to find the original place I located the solar to battery setup. Here it is
He also references this chap’s tutorial
The size of the panel is what has me confused. I guess it is a bit dependent on how much power you will require for your project. I was mistaken in my earlier comments about the size I needed. I think I actually need to have a smaller panel in terms of voltage produced for my plans to control the blinds which would be used very infrequently in a day
His table explaining the battery power v solar power is really good and I think that’s where the problems I’ve had will be solved.
The diode is of extreme importance too as it prevent a charge going back on to the panel itself. I also use one of these diode with a garden watering solenoid project to do a similar task and it does the trick perfectly.
Hello @jonathanp ,
This is quite old but i want to add battery tot my smart blindes. Is do nog get enough power out the battery i guess nog enough Amps to control the Servo.
The ESP is powered but Servo wont move.
When powered by USB IT Works.
You got a voltage booster, what does IT do and would that solve it? What Do you think?
Thanks!
The voltage booster will basically get the power up to a USB interface for powering the ESP and in turn the servo. You literally use a USB A to micro USB cable to the ESP. It’ll then have the necessary power for the servo.
Make sure your solar panel is the correct size to provide enough charge to the battery though.
The links up in this post are really good to go through to troubleshoot
