Solis Export Power Manager

ID: prod:solis-epm
IRI: https://solarlattice.org/kb/prod/solis-epm
Status: active
Also known as: EPM, EPM3-5G-PRO, EPM 5G-PLUS, Solis-EPM3-5G-PRO, Export Device
Category: Monitoring and communications
Make: solis
Product level: family

The Solis Export Power Manager (EPM) is a controller that watches how much power the site sends back to the grid and holds it below a limit you set. It works with all Solis grid-tied US inverters, single-phase and three-phase. It does not work with energy storage or hybrid inverters, because those control export themselves through their own CTs or meter. Three-phase 480 V and 600 V systems use an Acrel ADL 3000 meter with three split-core CTs. Single-phase 240 V systems with more than one inverter use an Acrel AGF-AE-D/200 meter with two CTs. The meter reports to the EPM over RS485 Modbus. The inverters are daisy-chained on RS485, and the Solis logger or a third-party gateway connects to the EPM. A Solis logger can handle at most 10 inverters. For larger systems, for third-party monitoring or for commercial 600 VAC sites, Solis recommends FOMware instead. A failsafe setting makes the inverters stop or drop to low output if communication, the CTs or the EPM's power supply fails. CT phase rotation and polarity must match the voltage connections: P1 faces the grid, and active power should read positive when exporting. Never remove the CTs under load. The open CT secondary can develop a dangerous high voltage.

<!-- review notes

sentence 3: support check: partial - The ADL 3000 with three CTs is stated for three-phase systems and the AGF-AE-D/200 with two CTs for single-phase multi-inverter systems, but the pairing of the ADL 3000 specifically with 480/600 V is only implied.
sentence 7: support check: partial - Phase rotation matching voltage, P1 on grid side and positive active power meaning export are stated, but polarity is not stated as having to match the voltage connections.
sentence 7: review: partial - The source says phase rotation must match the voltage connections, that P1 goes on the grid side and that positive active power means export, but it does not say polarity must match the voltage connections. -->

Claims

`manufactured_by`

c1 verified · fact Solis

Solis_Manual_EPM3_5G_Pro_20250724 sec=h1 h=e5cbc10f6189
Solis_Manual_EPM3_5G_Pro_20250724 sec=1.1 h=92a1e237298d

verified by: review-workflowverified on: 2026-10-24

`implements`

c2 drafted · lead Export limitation

Controls inverter output so grid export (backflow) does not exceed the set limit, based on meter and CT measurements.

Solis_Manual_EPM3_5G_Pro_20250724 sec=1.1 h=92a1e237298d
Solis_Manual_EPM3_5G_Pro_20250724 sec=3.8 h=95879712d1dd
Solis_Manual_EPM3_5G_Pro_20250724 sec=3.7 h=c2f13baa5004
44002687170-solis-meter-and-ct-compatibility-guide sec=h1 h=0caa9c940137

c3 drafted · lead Communication-loss fallback

FailSafe setting: inverters stop or go to low generation if communications, CTs or EPM power fail.

44002027137-export-power-manager-setup-5g-plus sec=h1 h=4eff29975b94

`compatible_with`

c4 drafted · lead Grid-tied PV without storage

Scope: regions United States proposed

Conditions: All Solis grid-tied US models, single-phase and three-phase

Solis_Manual_EPM3_5G_Pro_20250724 sec=1.1 h=92a1e237298d

c5 drafted · lead Solis-1P(3.6-10)K-4G-US

Conditions: Required for export control of systems with multiple inverters; a single single-phase inverter needs only the meter and CTs

Solis_Manual_Solis-1P(6-10)K-4G-US_PLUS_V2.1_20250804 sec=3.7 h=837fee14e4ce
Solis Export Power Control Application Note_V2.2_20250729 sec=h5 h=19d63137bc9c

review note: support check: partial - Passages show the EPM is required for multiple inverters and the kit lists the Solis-1P(3.6-10)K-4G-US manual, but the explicit compatibility with that model is only implied and the single-inverter case is stated generally, not for this model.