This makes the warranty a particularly important consideration, especially given the cost of setting up a robust battery bank. There's usually some guarantee of a number (or unlimited) amount of cycles and an ending capacity guarantee to go along with that warranty duration.īatteries can fail or suffer from poor performance and shortened life spans for a number of reasons, like overheating and freezing. Most residential solar installers offer lithium batteries from a major manufacturer that will typically be warrantied for at least 10 years. Expect to pay more for a known brand or a stronger chemistry like lithium iron phosphate, or others that might outperform lithium ion batteries in certain ways. ![]() There's lots of variation out there in batteries. Certain co-ops and other local utilities may even help you install batteries. Incentivesīeyond the federal tax credit, a number of states and local jurisdictions also offer incentives for adding solar batteries to your system. Additional equipmentĪdditional equipment like charge controllers, inverters and EV charging stations are going to be required to make your batteries' electrons usable in forms compatible with various appliances. And of course, the inverse of this rule also seems to be true. Across all the lithium-ion solar battery brands, you can expect to pay between R12,000 and R70,000 and up for home use batteries and millions of rands for commercial batteries. WarrantyĬompanies offering a strong warranty for their batteries often bake that into the price by charging a bit more. A PylonTech Battery can start from as little as around R13,000 for a 2.4kWh battery to around R60,000 for a 9.6kWh battery bank and up the more batteries, you add. The good news here is that sellers often offer a bulk discount if you buy more than one battery. The more kWh you need to support your home's energy demands, the more you can expect to pay for larger or more batteries. This will likely be the key driver of price. She opted to install more batteries rather than double or triple the amount of panels.īattery price varies by brand, model and the specifics of your situation. Modern lithium batteries are temperamental to heat and cold, but if they are kept under stable conditions, they hold up much better over the long term than the flooded lead acid batteries of generations past.įishman said she's been using batteries with her 2.4-kilowatt home solar system for over a decade. So a battery that sits fully or almost fully charged and is rarely called upon will likely last longer than one that is constantly used and recharged. You essentially damage batteries each time you use them. ![]() ![]() Each time a battery is discharged and then replenished, it theoretically loses a tiny bit of its storage potential. It's better not to think of batteries' lifespan in terms of years, but in terms of cycles. Gordon Donovan/Getty Images What is the average lifespan of a home battery?īatteries are typically warrantied for at least ten years, but there's often a number of variables affecting their actual longevity. One reason you might want a backup battery.
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