The Best Type of Battery for a Home Solar System

; kW 90.7% Sonnen EcoLinx (AC) NMC 3 45 kWh 8 kW 84% Again, how your existing solar system is configured may dictate whether an AC- or DC-coupled battery is best. If you have an existing solar system, then an AC-coupled battery will be easier to add to the mix for whole-home backup. If you don’t already have solar panels, then a DC-coupled battery may be a cost-effective solution. For whole-home backup, a high round-trip efficiency is particularly important, as it means you’ll be able to store more of your solar production for use later. If the grid is your primary power supply, then a lower capacity battery may still be an option if it can provide the necessary peak and continuous power output. Weighing extra costs against potential lifelong returns is key to sizing the battery correctly for whole-home backup. Consider other battery features Each battery has its pros and cons, and your specific energy goals may dictate one battery over another. For example, Tesla Powerwall 2 is known for its sleek design and ability to stack nine batteries together for greater capacity. On the other hand, the LG ESS Home 8 is known for its long lifespan and backup capabilities. Connect with an Energy Advisor to design a custom solar & battery system for your goals. Designing a battery system around your unique goals Your energy goals should be the primary driver of your solar and battery purchasing decision. By identifying which of these three most common scenarios aligns best with your goals – cost savings, quick and reliable essential backup power, or whole-home backup – you can then determine which battery chemistry, current type, and capabilities are best for you. Ensure that you work with a knowledgeable solar+storage installer, an electrical contractor, or an Energy Advisor when configuring your new solar-plus-battery system. Once you’ve identified your path forward, seek proposals from different contractors to compare end-to-end cost, workmanship warranties, and ongoing support options. Anything else we can help with? If there’s anything else you’d like to know about solar batteries before making the decision, don’t hesitate to reach out to our team of Energy Advisors. We’re here to empower you with the information needed to make your best energy-related decisions. We offer free design services and monitoring beyond installation, so you can monitor your system’s production and consumption and feel comfortable that it was installed correctly.