This is a 4G cellular dongle from Fortress Power, used to give an Envy series inverter an internet connection for remote monitoring when Wi-Fi or ethernet isn't available at the install site.
Fortress Power builds the Envy series as a monitored hybrid inverter platform, and this 4G dongle is the accessory that closes the loop on remote visibility when a jobsite lacks reliable internet. 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.
Because this is a communications accessory rather than a current-carrying part, the electrical fitment concerns that apply to battery cables or bus bars (AWG, ampacity, lug torque) do not apply here. What matters instead is inverter-model compatibility and firmware support, and the manufacturer data provided does not specify full technical details for the dongle itself.
Critical Fitment & Requirements
- SKU: ENVY4GDONGLE — Fortress Power branded accessory.
- Referenced in manufacturer documentation alongside the Envy Duo 21 and Envy 8/10kW Hybrid Inverter product pages.
- Cellular band, carrier compatibility, data plan requirements, and physical connector type are not listed in available manufacturer data. [NEEDS VERIFICATION]
- NOT confirmed to work with non-Envy Fortress Power inverters (e.g., legacy eFlex-only systems without Envy control boards) based on available data. [NEEDS VERIFICATION]
- NOT a substitute for a proper internet/Wi-Fi connection where one is available — use per manufacturer install guidance in the Resources tab.
Key Benefits
- Adds remote monitoring capability to Envy-series inverters without requiring a hardwired internet drop.
- Fortress Power branded part, positioned as an official accessory for the Envy inverter line.
- Supports the Fortress Power mobile app monitoring workflow referenced for the Envy Duo 21 and Envy 8/10kW platforms.
- Simplifies commissioning at sites without existing network infrastructure.
| Spec | Value | Unit |
|---|---|---|
| Brand | Fortress Power | — |
| SKU / Model | ENVY4GDONGLE | — |
| Price | 528.99 | USD |
| Compatible Product Family | Envy Duo 21, Envy 8/10kW Hybrid Inverter | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Positive fitment: Referenced by the manufacturer in connection with the Envy Duo 21 hybrid inverter and the Envy 8/10kW Hybrid Inverter.
- Negative fitment: NOT confirmed for use with Fortress Power battery-only products (eFlex, eVault, eForce) independent of an Envy inverter — this is a communications accessory for the inverter, not the battery. [NEEDS VERIFICATION]
- Negative fitment: NOT confirmed for non-Fortress Power / third-party inverter brands.
- Carrier network compatibility (e.g., specific 4G LTE bands) is not stated in the available manufacturer data. [NEEDS VERIFICATION]
| Item | Status |
|---|---|
| UL Listing | [NEEDS VERIFICATION] — not stated in provided data |
| IP Rating | [NEEDS VERIFICATION] — not stated in provided data |
| NEC Ampacity Reference | Not applicable — this is a communications accessory, not a current-carrying part |
FAQ
What does this dongle do?
It provides a 4G cellular internet connection to a compatible Fortress Power Envy inverter so it can send monitoring data without a local Wi-Fi or ethernet connection.
Which inverters is this dongle designed for?
Manufacturer data references it in the context of the Fortress Power Envy Duo 21 and Envy 8/10kW Hybrid Inverter product family.
Does this dongle include a data plan or SIM card?
This detail is not specified in available manufacturer data. Confirm with Fortress Power or check the Resources tab before ordering.
Will this dongle work with a 48V battery system?
The dongle is a communications accessory, not a power or battery component. Voltage rating does not apply to it directly, but it is intended for use with Envy-series hybrid inverters.
Warranty & Registration
Manufacturer warranty terms specific to the ENVY4GDONGLE accessory are not included in the provided data. Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the applicable Fortress Power warranty document, or contact us before you order if you need the term confirmed in writing — we always reply back.
