Site Map Pages About Rebates & Incentives Accessories Applications Do It Yourself (DIY) Live Independent of the Energy Grid Power Outage Protection Reduce Demand Charges Reduce Peak Charges Zero Grid Export Careers Commercial & Industrial Commercial & Industrial Case Studies Commercial & Industrial Case Studies | Aerostar Puerto Rico Commercial & Industrial Case Studies | Chick-Fil-A Commercial & Industrial Case Studies | City of Chino Hills Public Works Commercial & Industrial Case Studies | Dallas/Fort Worth International Airport ARFF East Commercial & Industrial Case Studies | Eureka City Schools Commercial & Industrial Case Studies | Team Toyota Commercial & Industrial Case Studies | The Crossings Church, Costa Mesa, CA Commercial & Industrial Case Studies | Yonkers Honda Commercial and Industrial Project Quote Keystone EMS Nano Pro vs Nano Standard Contact Us Customer Complaint Form Dealers Certified Installer Dealer Application Dealer Resources E-Commerce Partner Onboarding Fortress Power Installer Tools Fortress Power Pro Mobile App Installer Case Studies Inverter Compatibility PV String Size Calculator Education and Training EnergyBroker 3CE Residential Battery Rebate Program | California Arizona Public Service Bring Your Own Device (BYOD) Program Battery Storage Rewards Program | PSEG Long Island Community Power Solar Battery Savings Program | San Diego ConnectedSolutions Program | Massachusetts ConnectedSolutions Program | Rhode Island Connecticut Energy Storage Solutions Program Duke Energy Incentives in North Carolina Duke Energy Incentives in South Carolina EnergyBroker Application EnergyBroker Frequently Asked Questions EnergyBroker Program with LUMA Energy in Puerto Rico EnergyBroker Sales Commission Application Green Mountain Power Bring Your Own Device Program Hawaiian Electric Bring Your Own Device Program Holy Cross Energy Power+FLEX Program Pacific Power Wattsmart Battery Program | Oregon PGE Smart Battery Pilot Program | Oregon Rocky Mountain Power Wattsmart Battery Program Self-Generation Incentive Program (SGIP) | California Small Battery Incentives | Efficiency Maine Events Firmware Fortress Power Financing Partners Fortress Power Mobile Apps Fortress Power Partner Listing Fortress Power Solo Inverter Contest Fortress Power Stories Guardian Guardian Privacy Policy Guardian Terms & Conditions Home Homeowner Fortress Power Home Mobile App Fortress Power Solo 6.5K Inverter App Guardian Notes Homeowner Success Stories Homeowner Success Stories | Hartland, VT Homeowner Success Stories | Hilo, HI Homeowner Success Stories | Mount Denali, AK Homeowner Success Stories | Raney Ranch Residential Case Studies Residential Package Options Residential Power Estimator Keystone EMS Newsletter Signup Privacy Policy Product Documents and Manuals Products DuraRack – Indoor / Outdoor Enclosure eFlex 5.4kWh LFP Battery eFlex MAX 5.4kWh eForce Stackable Whole-Home Energy Storage System eSpire 290FC Energy Storage System eSpire 306 Energy Storage System eSpire Mini eSpire Nano eVault 18.5kWh LFP Battery eVault MAX 18.5kWh LFP Battery ® FlexTower All-in-One ESS Enclosure Fortress Power eBoost Scalable Energy Storage System Fortress Power EdgeOn Duo 9/15 Inverter Fortress Power Envy 12kW Fortress Power Envy 8kW/10kW Inverter Fortress Power Envy Duo 21 Inverter Fortress Power Solo 6.5K Inverter LFP-10 MAX – 10kWh Lithium Battery LFP-5 & LFP-10 Battery Series Request Quote Residential Transfer of Ownership Residential Warranty Coverage through Solar Insure Residential Warranty Programs Sales – General Inquiry Site Map Support bot Support – Create a Support Ticket Support – General Inquiry Terms & Conditions The Energy Edge | A Fortress Power Blog Where to Buy WP File download search CategoriesCategories Select Category Blog Case Studies Press Release Solar Batteries Video Recent Posts Commissioning an eSpire Nano in Under Five Minutes October 5, 2026 More Control Over Your Home Energy: Inside the Fortress Power Owner App September 28, 2026 Integrating Battery Storage With an Existing Commercial Generator September 23, 2026 What Sets the eSpire Nano Apart From Other Three-Phase Energy Storage Solutions September 14, 2026 When Does a Commercial Energy Storage Project Need an Advanced EMS? September 8, 2026