However, AGM are significantly higher priced than lead-acid batteries. A good source of detailed information on AGM batteries is the Northern Arizona Wind and Sun's web site given below. Advantages over lead-acid batteries are longer life cycles and ability to withstand high discharge and charge rates and its ability to handle full discharges without compromising the battery life and efficiency. Disadvantages, however, are higher charging voltages, lower charge efficiencies, lower cell voltages, environmental disposal problems, and higher costs compared to lead-acid batteries. As a result, they are seldom used in renewable energy systems.
Battery capacity is measured in amp hours.
6 or 12 volt sizes. Use the following directions adapted from source to calculate system load requirments and battery size needed. AC loads 1. DC Loads 3. Total Load 5.