This is the APSmart rapid shutdown module used with Fortress Power Envy inverters, letting installers meet code-required PV shutdown without adding separate third-party transmitters.
Rapid shutdown compliance is a code requirement, not an optional add-on, and Fortress Power built the APsmart transmitter directly into its Envy inverter line rather than relying on a bolt-on third-party device. That integration reduces wiring complexity at the array and cuts down on failure points at the PV disconnect. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
- Designed for use with the Fortress Power Envy Duo 21 Inverter and Envy 8/10kW Hybrid Inverter.
- Function: Module Level Rapid Shutdown Transmitter, referenced by manufacturer as supporting NEC 2017 & 2020 code compliance for the Envy 8/10kW.
- NOT documented for use with any inverter brand other than Fortress Power Envy series in the source manufacturer data.
- NOT specified with independent wire gauge, terminal lug size, or standalone voltage rating in available manufacturer data — refer to the Envy inverter installation manual for wiring specifics. [NEEDS VERIFICATION]
- Integrated into Fortress Power's Envy inverter platform rather than sold as a generic universal accessory.
- Reduces external wiring points at the PV array compared to third-party add-on rapid shutdown transmitters.
- Supports remote firmware update capability through the Fortress Power mobile app, per manufacturer data on the Envy platform.
- Positioned by the manufacturer as part of a "code-compliant installation" package alongside integrated AC/DC breakers.
| Spec | Value | Unit |
|---|---|---|
| Compatible Inverter (1) | Envy Duo 21 | - |
| Compatible Inverter (2) | Envy 8/10kW Hybrid Inverter | - |
| Module Type | Rapid Shutdown Transmitter (APsmart) | - |
| SKU | APSMARTDUO | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
- Fits: Fortress Power Envy Duo 21 Inverter (48V hybrid inverter platform).
- Fits: Fortress Power Envy 8/10kW Hybrid Inverter (48V hybrid inverter platform).
- Does NOT fit: inverters outside the Fortress Power Envy family per manufacturer source data.
- Does NOT include: independent AWG, terminal lug, or ampacity documentation in the provided manufacturer data — confirm against the Envy installation manual before wiring. [NEEDS VERIFICATION]
| Compliance Item | Detail |
|---|---|
| Code Reference | Referenced by manufacturer as supporting NEC 2017 & 2020 rapid shutdown requirements (Envy 8/10kW) |
| UL Listing | [NEEDS VERIFICATION] — not stated in provided manufacturer data for this module |
| IP Rating | [NEEDS VERIFICATION] — not stated in provided manufacturer data |
FAQ
Which Fortress Power inverters does this rapid shutdown module work with?
The APSmart module is referenced in Fortress Power documentation for the Envy Duo 21 inverter and the Envy 8/10kW hybrid inverter, both of which include a built-in APsmart rapid shutdown transmitter interface.
Does this module help meet NEC rapid shutdown requirements?
Manufacturer data states the Envy 8/10kW's integrated rapid shutdown transmitter is designed to help installations meet NEC 2017 and 2020 code requirements without external devices.
Will this work with a different brand of hybrid inverter?
No. Manufacturer source data only documents this module in the context of Fortress Power Envy-series inverters. Do not assume compatibility with other brands.
What voltage or amperage is this module rated for?
Manufacturer source data does not provide a separate voltage or ampacity rating specific to the APSmart module itself. [NEEDS VERIFICATION]
Warranty & Registration: Specific warranty terms for the APSMARTDUO module are not detailed in the provided manufacturer specification data. Please refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's official warranty document. [NEEDS VERIFICATION]
