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I'm looking for a reliable supplier for a 15kWh battery pack specifically designed for solar power storage applications. It's crucial that the battery system is efficient, durable, and capable of handling frequent cycles, as it will play a key role in maximizing energy capture and storage from solar panels. Additionally, I'm interested in details about warranties, expected lifespan, and any certifications the product might have to ensure quality and safety standards. If possible, provide information on your lead times and pricing structures. A quick response would be greatly appreciated, as we are eager to move forward with this project.