Today's deep cycle / solar batteries, are about the most costly part of a system, especially since panels have come down so much in price over the past few decades. So, one should really carry out due diligence when searching for the best battery bank to power their system.
Recently, I came upon an interesting bit of information regarding FLA (flooded lead acid) batteries, and set it aside in a text file to keep. I am in agreement with the author's words. However, unfortunately, I do not know who he, or she is.
- Flooded lead acid (FLA) deep cycle batteries last twice as long (as sealed batteries), in a situation where the battery gets used and can be (properly) maintained. Don’t just take my word for it, look at the spec sheets. Still don’t believe me? Show me a golf cart, forklift, Zamboni, floor scrubber, or any other large battery operated vehicle with a sealed battery.
- FLA are about half the price of sealed batteries.
- FLA batteries are actually pretty easy to take care. Auto watering kits allow you to water a bank in less than 5 minutes. You can check SG (Specific Gravity) like a scientist or equalize routinely, charger settings are very important but that should be setup correctly at system commissioning by your installer.
- A battery bank is not the only thing in your house that needs to be vented because of potentially explosive gases. Gas dryers, septic tanks, toilets, water heaters, stoves, fireplaces. If it’s installed correctly it’s not a problem.
- If a battery can survive in an engine compartment, it can probably live in a box on your property.