![]() Batteries are an alternative to generators, which have advantages and disadvantages when compared to solar with battery backup.Įarly adopters will be rewarded with stable and endless power as long as the systems are used within their design parameters. There is no return on investment, at least in Florida where residential energy is billed at the same rate for all times of day. The same cannot be said for batteries.īattery backup is strictly a cost and a luxury. There is a distinct and attractive return on investment and environmental benefit. A strictly grid-interactive solar energy system is the most economical way to participate in the solar energy revolution. Should I Buy Battery Backupīattery backup for solar panels is not for everyone. While these are more expensive initially, they offer much longer lifespans. Most modern system are switching to Lithium Ion of some sort. Older lead-acid batteries, like the type used in vehicles, are tried and true, and offer lower pricing for the same storage, but are much larger, heavier, and messier. Lithium Ion batteries, the type used in laptops, phones, and electric vehicles are gaining popularity. The battery chemistry itself has evolved dramatically recently. If you need a very large system and you’re starting from scratch, a DC-coupled system may be better. If you have an existing PV system or modest backup needs, you may be better off with an AC-coupled system. ![]() The type of system you should purchase depends on many factors. Each has its own merits and its own place where it shines. There are schools of thought on whether older DC-coupled technology or newer AC-coupled technology is better. All systems need a transfer switch of some kind. There are also “smart” batteries that have integrated inverters. There are traditional “dumb” batteries that need an inverter to convert DC to AC power. When we talk about batteries in the modern solar industry, we are really talking about a variety of battery types and components.
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