watts x 2 plus 8 watt gives a total of around 80 watts which is the total required consumption level here. The DC input source is a solar panel which may be capable of producing an excess of 3V during optimal sunlight, and allow the charger to charge the battery with a maximum of 1.8V output. But thanks to the modern highly versatile chips like the LM 338 and LM 317, which can handle the above situations very effectively, making the charging process of all rechargeable batteries through a solar panel very safe and desirable.

Specification: Peak Power Output: 2.4 watt, Peak Volts Output: 12.7 volts, Optimum Working Current: 0.13-0.2 amps. P1 is used for adjusting the T1/T2 stage such that the T2 LED just illuminates at 12V, similarly P2 is adjusted to make the T4 LED begin illuminating at voltages below 11V. This is a pilot project for me to venture into this field. You can count me to be a big zero in electrical knowledge. ) Modern vehicles have a small but constant battery drain such as alarm systems, and immobilisers. This means that over the course of a week or two with no or little vehicle use the battery can become discharged. A 12V battery that is not correctly maintained above 12.4V can suffer from sulphation. Sulphation is the number one cause of battery failure, something not covered under warranty as it is not a manufacturing defect. The circuit should use relay or bjt transistors as a switch and zener for voltage reference thanks sir hope to hear from you soon!

The zener value is therefore appropriately chosen to match the charging voltage of the connected battery. For a layman this would be something too complex and sophisticated to grasp and a system involving extreme electronics.

Before delving into the following concepts you can probably try this super easy solar battery charger which will ensure safe and guaranteed charging of a small 12V 7 Ah battery through a small solar panel: I along with a colleague have made some lights with 7V EW high power batteries and 2x20mA pirahna Leds and tested them-they lasted for over 30 hours of continuous lighting adequate to light up a book from half-meter distance; and another with a 4v sunce battery and 1watt 350A LED giving enough light for cooking in a hut. With a quoted output of 10W, Photonic Universe’s reasonably priced kit shouldn’t be the most powerful charger here. But it was the most effective, even though it looks a little ‘home made’.This type of adapter is usually a larger plug than the smaller 1A adapters, which will need more power for the charger to work correctly. Even with the correct power supply, charging tends to be slower than standard AC-powered chargers, especially if you're trying to charge multiple large batteries. The charger is easy to install and is fitted with a flashing blue LED light to indicate charge. There is built in discharge protection as well as reverse polarity protection and the Solar Charger will not overcharge your battery. This is a huge panel, though, with dimensions similar to those of the Optimate and Halfords units. Despite this, the output is only 4.8W. It did prove able to supply this amount even in overcast conditions. However, the biggest issue is the cost – the Sealey doesn’t do anything special to justify the price. You can even charge your battery by using the crocodile connectors that are provided and connecting them directly to your car battery under the bonnet. This isn’t as neat a connection and you’ll have to lift your engines bonnet and leave it up to charge, but at least you have this option. What Is an EOBD Connector Couple more questions, I cannot find a solar panel with those specs, do you think you could send me one on the internet so I can find something similar? Great idea on the flashlight bulb, I assume this would need to be an incandescent light? Do you think this would properly protect the battery or would an additional resistor be needed?