1. Solar Batteries Batteries are a key component of both grid tie w/ back-up and stand alone solar energy systems

2. Three Types of Batteries used in Solar Systems: Flooded lead acid Absorbed Glass Mat Sealed Lead Acid Gelled Electrolyte Sealed Lead Acid

3. Flooded Lead Acid Have longest track record in solar usage Longest lifespan Least cost per amp hour High maintenance

4. Absorbed Glass Mat Sealed Lead Acid Ideal for grid tied solar w/ battery back-up Low to no maintenance Becoming more affordable

5. Gelled Electrolyte Sealed Lead Acid Charges slower than other two types Predates AGM batteries but are losing market share

6. Deep Cycle vs Shallow Cycle Deep Deep cycle batteries can be repeatedly discharged to 80% and recharged without damaging them Recommended for use with solar Shallow Occurs when the top 20% or less of the batteries energy is discharged and then recharged Shallow cycle batteries not recommended for solar use

7. 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

8. 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

9. The End.