Energy Storage System
RAE Charge
RAE Charge is a high-capacity energy storage system designed for resilient backup, demanding home and site energy needs, and long-term participation in connected energy programs. It is built to be installed, serviced, and trusted for decades.
System role
Stores energy for resilient backup, demanding capacity needs, and long-term participation in connected energy programs.
- 20 kWh energy capacity
- 10 kW continuous discharge
- 20 kW peak discharge for 3 seconds
- Expandable system architecture
- UL 9540 and UL 9540A certification path
Designed around
High-capacity storage for resilient backup and demanding loads.
Built for real loads
Capacity and discharge performance sized for whole-home and small-site energy needs, not accessory backup.
Serviceable by design
Pack-level telemetry, active thermal management, and a service-aware enclosure support long operating life.
Part of the platform
Charge is monitored, diagnosed, and coordinated through RAE Connect and RAE Summit from day one.
Downloads
RAE Charge one-pager
A print-ready summary for proposals, permitting packets, and customer conversations.
Use cases
A storage foundation, not an accessory battery.
RAE Charge is being developed for homes and sites that expect their energy system to carry real loads, recover from outages, and take part in programs as they arrive.
Resilient backup
Keep more of the site supported when power matters.
Charge is designed for homes and sites that need a serious storage foundation, not a small accessory battery.
Demanding loads
Support meaningful energy needs across the property.
The system is built around capacity, discharge performance, and coordinated operation for real-world use.
Connected programs
Prepare storage for future energy participation.
Charge works inside the RAE platform so storage can be visible, managed, and coordinated as programs mature.
Serviceable ownership
Make the system easier to understand and support.
Telemetry, diagnostics, service-aware design, and an integrated touchscreen support clearer operation over time.
Engineering
What is inside the design.
Power architecture
A 20 kWh battery architecture with meaningful continuous and peak discharge performance, high-current internal bus bars, layered electrical protection, and coordinated power flow inside the enclosure.
- 20 kWh energy capacity
- 10 kW continuous discharge
- 20 kW peak discharge
- High-current internal bus bars
Installation and service design
The physical design supports practical installation planning, service access, wall-mounted deployment, and stacked ground-mounted configurations where the site and inverter architecture allow.
- Wall-mounted installation
- Stacked ground-mounted configurations
- Under 400 lb per unit
- Integrated disconnect and fusing
Telemetry and controls
Pack-level telemetry and an integrated touchscreen interface give installers, owners, and support teams clearer visibility into operating state, health, thermal behavior, diagnostics, and service information.
- Pack-level telemetry
- Thermal distribution visibility
- Integrated touchscreen interface
- Connect and Summit diagnostics
Thermal and lifecycle design
Active thermal management and a balancing architecture keep every cell working within its comfort zone, for consistent performance and a long service life.
- Active cooling system
- 15 A pack-to-pack balancing
- 5 A cell-to-cell active balancing
- 8,000-cycle warranty target
Safety architecture
Safety designed in, then certified.
Layered protection, thermal management, propagation isolation, and a certification path built around UL 9540 and UL 9540A.
Electrical protection
Layered electrical protection, integrated disconnect planning, fuse protection, and high-current internal architecture support safer installation, service, and system-level operation.
Thermal monitoring and cooling
Thermal distribution monitoring and active cooling help manage pack temperatures, maintain performance consistency, and protect long-term battery life.
Propagation isolation
Cell-level fire and thermal propagation isolation features are part of the safety architecture to help limit event spread within the pack.
Certification requirements
RAE Charge is being developed around UL 9540 and UL 9540A. UL 9540 evaluates the complete energy storage system and electrical pathway; UL 9540A evaluates thermal runaway and fire behavior so the safety architecture can be validated before release.
Key specifications
The numbers that matter when you plan a system.
Capacity, power, placement, and certification in one place. Everything else about the design lives in the sections above.
| Area | Specification | Detail |
|---|---|---|
| Energy capacity | 20 kWh | Enough to carry the loads you choose through an outage and to shift everyday use away from peak rates. |
| Continuous power | 10 kW | Sustained output for whole-home and small-site loads. |
| Peak power | 20 kW for 3 seconds | Headroom to start motors and other high-demand appliances. |
| Installation | Wall-mounted or stacked on the ground | Configuration depends on the site and the inverter architecture. |
| Enclosure | IP67, indoor or outdoor | Sealed against dust and water for demanding residential and site environments. |
| Operating temperature | -15 F to 125 F | Year-round operation across a wide range of climates. |
| Noise | Quieter than a household refrigerator | Comfortable near living spaces. |
| Warranty | 8,000 cycles | Up to 160 MWh of lifetime energy throughput at 20 kWh capacity. |
| Certification | UL 9540 and UL 9540A | System safety standard and thermal-runaway test method for stationary energy storage. |
Figures are design targets for a product in development. Warranty terms, supported configurations, and certification status will be confirmed in final product documentation.
Integrated stack
Built as one part of a connected energy system.
Each RAE product has a clear role, but the platform is strongest when hardware, controls, orchestration, and software intelligence work together.
Start a conversation
Planning around RAE Charge?
Tell us about your site, project, or program and we will follow up with the right people.