Best Solar Bundle partners with multiple leading manufacturers to provide certified solar + storage solutions for both grid-tied and off-grid applications.
• Grid-tied systems: All solutions comply with UL 9540 / 9540A standards, ensuring the highest level of safety and meeting U.S. interconnection requirements.
• Off-grid systems: Designed for remote or backup use, these solutions follow relevant component-level certifications (UL 1973 batteries, UL 1741 inverters) to guarantee safety and reliability, even where UL 9540 is not required.
By coordinating across multiple factories, our kits are cross-tested for compatibility and stocked in U.S. warehouses for fast delivery. This ensures customers receive trusted, compliant systems that fit their project needs
