How to Protect Solar Inverter Battery .Design Note 28


Hybrid-Solar-Charger-Circui
One of the main problems in Solar Inverter system is poor charging of Battery during rainy seasons and in cloudy days. The high current Tubular battery requires more than 1 Ampere current for proper charging. To solve this problem, I have designed a” Hybrid Solar charger” and the circuit was published in Electronics for You magazine September 2013 issue. So the charger has two sides. One side gets power from Solar panel and the other side from a Step-down transformer. If the voltage from Solar panel reduces below 9 volts, the charger shifts to AC mode and battery charges via the current from transformer.
Continue reading “How to Protect Solar Inverter Battery .Design Note 28”

Advertisements

3 Amps Battery Charger.Utility Circuit 2


Here is a general purpose battery charger that can deliver 3 Ampere current at 12 Volts to charge Lead Acid battery or Tubular battery. The Ampere meter provided in the circuit indicates how much current is flowing into the battery. Two LED indicators are included to show the charging status.

Continue reading “3 Amps Battery Charger.Utility Circuit 2”

Dual Mode Inverter Battery Charger


Here is a dual charger for Inverter battery. It can charge the battery via Solar panel as well as from AC power to keep the battery always in top condition. Even though a 12 volt Solar panel gives around 20 volts in full sunlight, it is available only three or four hours in a day. During the remaining hours, the intensity of light is very low and the condition worsens in cloudy and rainy days. This results in incomplete battery charging that ultimately leads to memory effect and permanent damage of the battery. This charger shifts the charging to AC mode when the voltage from solar panel reduces below 12 volts and restores the solar charging when the sunlight is sufficient enough again.

Continue reading “Dual Mode Inverter Battery Charger”

How to maintain Maintenance Free Battery? Tech Focus 5


“My UPS is not giving sufficient back up”. This is the most common complaint raised by PC users. It is not the fault of the UPS, but is due to the poor maintenance of its battery. Sealed batteries are used in UPS, Emergency lamps etc do not require water and acid top up. There is no water loss in these batteries during the charge/discharge cycle and it can be positioned in any direction like vertical, horizontal etc. These sealed batteries are known as SMF (Sealed Maintenance Free) or VRLA (Valve Regulated Lead Acid) batteries and they work on the oxygen recombination principle. SMF battery is totally maintenance free and has longer cyclic life, thus compensating the initial higher cost. One of the important aspects of battery life in relation to the use of equipment is the cut off voltage set in the equipment. If properly maintained, the sealed battery can give sufficient back up time. Let us see the tips to increase the life of UPS and Inverter battery.
Continue reading “How to maintain Maintenance Free Battery? Tech Focus 5”

3 Amps Battery Charger


Here is a general purpose battery charger that can deliver 3 Ampere current at 12 Volts to charge Lead Acid battery or Tubular battery. The Ampere meter provided in the circuit indicates how much current is flowing into the battery. Two LED indicators are included to show the charging status.

Continue reading “3 Amps Battery Charger”