Please sir can you make me a 12v, 28.8AH lithium ion battery,automatic charge controller using solar panel as a supply, which is 17v at 4.5A at max sun light. The battery should be replaceable when dead after use for 2/3 years/prescribed life by the rural/tribal user. The above designs can be further simplified, as shown in the following over-charge, over-discharge solar battery controller circuit: The lower NPN transistor is BC547 (not shown in the diagram)

Solar Power Manager 5V - DFRobot Solar Power Manager 5V - DFRobot

Recall the earlier low battery indicator circuit using transistors, where the low battery level was indicated using just two transistors and a few other passive components. In the above case, the regulator needs to produce around 7 to 10amps of current therefore an LM396 or LM196 must be used in the charger stage. This is our favorite waterproof charge controller for lead acid batteries. Battery Capacity (in Watt hours) X 2 / Rated Panel Power (in Watts) T5 is a power transistor which acts like a switch and is triggered by the critical low battery stage, whenever the battery voltage tends to reach the critical level. We'll also need a solar charge controller for charging the battery, and since the battery would be charged for the period of around 8 hours, the charging rate will need to be around 8% of the rated AH, that amounts to 80 x 8% = 6.4 amps, therefore the charge controller will need to be specified to handle at least 7 amp comfortably for the required safe charging of the battery.

Lithium Ion Battery Charge Time from Solar

My basic goal is to maximize use of Solar power and reduce my electrical bill to minimum. ( 🙁 I stay at Thane. So, you can imagine electricity bills. ) So you can consider as if I am completely making a solar powered lighting system for my home.

Simple Solar Battery Charger Circuits | Homemade Circuit 9 Simple Solar Battery Charger Circuits | Homemade Circuit

Many rechargeable batteries are available to run the Pro-Mini. For this example, we will use a lithium-ion battery that provides a 3.7-V source from a single cell. The above power may be consumed from 6 am to 6 pm which becomes the maximum period one can estimate, and that's approximately 12 hours. For our Sunslice Photon and Sunslice Electron portable solar battery, we have opted for high efficiency monocrystalline cells, which are more expensive, but with higher efficiency and therefore produce more energy per unit area. This allows these portable solar batteries to be more compact, lightweight and efficient than our competitors.

I too have trouble believing that all the protection circuitry you need is built into the battery. Many of those protection circuits limit the discharge only. Hi, thank you for everything you do to help people out! My son would like to create a science fair experiment where he can show an electric car running on a solar panel only during the day while charging a battery and running on battery only during the night. For this, we planned to have a small solar panel connected to a battery and motor in parallel (see the attached drawing).

3.7V Li-Ion Lithium 1200mAh 4.44WH Rechargeable 2Ah Solar

A simple solar panel voltage regulator circuit may be witnessed in the following diagram, the given switch may be used for selecting a battery charging option or directly driving the inverter through the panel. As we can see in the diagram, the collector/emitter of the transistor BC547 is connected across the ADJ and the ground, it becomes responsible for initiating the current control actions. The circuit diagram shows a simple set up using the IC LM 338 which has been configured in its standard regulated power supply mode. Using a Current Control FeatureAs long as the solar voltage is available, the relay stays energized isolating the LED module from the battery and ensuring that the 40 watt LED module remains shut off during day time and while the battery is being charged.