Dealer Resource Center
Your hub for tools, guides, and support — everything you need to succeed with Fortress Power.
Sizing Tools
The Fortress Power System Designer tool helps installers and homeowners design the right battery storage system in minutes. Just enter a few details about the home and energy goals, and the tool will recommend the best-fit Fortress Power products—plus compatible solar modules to complete the system.
The Load Estimator Tool is a downloadable Excel-based calculator that helps installers quickly estimate system sizing by inputting project-specific load information. It’s designed to streamline project planning and ensure optimal battery and inverter selection.
Application Notes
When installing more than a single Fortress battery product, it becomes necessary to combine the DC outputs of the individual batteries in parallel before entering the inverter(s) or charge controller(s). We recommend using a busbar. Use this document to find the right one.
This technical note outlines recommended cable lengths, gauge sizes, and configuration best practices for safe, efficient, and code-compliant installations using the Fortress Power FlexRACK battery enclosure.
View the latest list of inverters that have been tested and approved for use with Fortress Power batteries. This resource helps ensure proper system design, smooth integration, and warranty compliance.
Support
Need help with a system or installation? Use this form to quickly connect with our technical support team for expert assistance.
Begin the warranty claim process here to report an issue and get your Fortress Power system evaluated for service or replacement.
Access step-by-step guides for integrating Fortress Power batteries with leading inverter brands — including wiring diagrams, programming tips, and best practices.
Stay up to date with the latest firmware to ensure optimal system performance, compatibility, and access to new features.
Want to get more exposure for your company on our site? List it on our Where to Buy page.
Local Jurisdiction Letters
This release note explains recent improvements to the energy density of Fortress Power battery cells, detailing the benefits for system performance, storage capacity, and product efficiency.
Marketing Material
Download Fortress Power logos, product photos, videos, data sheets, brochures, and other brand-approved materials — all organized for easy access and use in your sales and marketing efforts.
C+I Product Inquiry
Submit key details about your Commercial & Industrial energy storage project using this checklist form. Our team will review your submission to provide design guidance, product recommendations, and technical support.
