Nimh Solar Panel Charge Controller

I have built an iot motor controller board that s powered by 4 aa nimh batteries in series.

Nimh solar panel charge controller.

The solar panel connects to the controller through positive and negative leads only creating a charging function when the controller is connected to a battery. This diagram illustrates the connectivity of a typical solar power kit including a solar panel a solar charge controller a battery and the load e g. A user selectable charge timer allows charge rates from 0 167c to 2c. The solar panel is rated at 1 w with a max load voltage of 6 4 v and the product page is here.

Also you can use mppt charge controllers with strings of solar panels but not pwm controllers. If c 10 or slower at least 10 hours to recharge from dead you don t really even need a charge controller you could use something like this to monitor the charging rate voltage. Nimh charge controller what charge rate are you looking for. This is a follow up about my question here.

I went for overkill on the solar panel due to short days in the winter months. A charger controller protects your battery from overcharging and protects your panel from reverse current flow. Even this low charge current is great for my application because the circuit draw is only about 5 to 10 ma. I want to use a solar panel to trickle charge the batteries but the voltage slowly decreases even when the esp12f wifi module is sleeping and there s full sunlight on a 5v 200ma or 6v 150ma panel.

Discharge mode allows the ds2715 to enter a low power sleep state while the cell pack is being discharged. For example if you where using 2 000 mah aa nimh batteries the c 10 rate would be 200 mamps. I want to know if a charge controller would still be needed despite the solar panel never outputting more than c 10 of current to the battery. Jzk 20a 12v 24v intelligent solar panel charge controller with lcd display usb port overcurrent protection solar charge regulator for solar panel battery lamp led lighting 4 1 out of 5 stars 748 9 99 9.

Fast charge topoff and done modes are included for highly reliable safe charging of nimh cells. Both will regulate the maximum voltage that the solar panel can send to the battery but an mppt charge controller can be up to 30 more effective at storing and transferring energy than pwm models.