Solar Batteries Batteries are a key component of
Solar Batteries • Batteries are a key component of both grid tie w/ back-up and stand alone solar energy systems
Three Types of Batteries used in Solar Systems: • Flooded lead acid • Absorbed Glass Mat Sealed Lead Acid • Gelled Electrolyte Sealed Lead Acid
Flooded Lead Acid • Have longest track record in solar usage • Longest lifespan • Least cost per amp hour • High maintenance
Absorbed Glass Mat Sealed Lead Acid • Ideal for grid tied solar w/ battery back-up • Low to no maintenance • Becoming more affordable
Gelled Electrolyte Sealed Lead Acid • Charges slower than other two types • Predates AGM batteries but are losing market share
Deep Cycle vs Shallow Cycle Shallow Deep • Occurs when the top • Deep cycle batteries 20% or less of the can be repeatedly batteries energy is discharged to 80% and discharged and then recharged without recharged damaging them • Shallow cycle batteries • Recommended for use not recommended for with solar use
Weather Effects Batteries Performance • The charging and discharging of the batteries is governed by temperature and charge/discharge current • The colder the temp. the slower the reactions, and the warmer the faster the reactions • Optimum temp. for a lead acid battery is 77 degrees F
Keep good care of your batteries! • Battery voltage should be kept at or above 50% state of charge at all times for maximum battery life • Use only distilled water to fill batteries, never tap • Keep batteries electrolyte level at the marked full level
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