Let's say you are about to get a solar battery for your house. How much is it going to cost you? Most solar batteries are now lithium-ion, ranging from $6,000 to $20,000. The price depends on the size, quality, and warranties. Again, $6,000–$7,000 is a reasonable price for a 10 kW battery. Providing a backup for everything in your home, however, might be too expensive. After all, an average daily energy consumption for an American house is around 30 kWh, according to EIA. What solar experts propose is to carefully size a battery bank
, taking in account only essential appliances that you are going to use during a power outage.
So, what's the bottom line? Unlike PV modules, solar batteries shouldn't be considered an investment that pays for itself and brings in money. Instead, they are a great tool to make your home more energy sustainable and independent. They are not a must, but they can make your life easier if you are having troubles with the grid. During the last decade, we've witnessed a steep decline in prices for solar batteries. This trend can continue and make solar storage an even more reasonable choice.