FoxESS T12-G3 12kW three-phase inverter12kW three-phase string inverter, 2 MPPT

Overview

The T12-G3 delivers 12kW and 13.2kVA on three phases from up to 18kW of PV across two MPP trackers with one string each. It is the largest convection-cooled T series (G3) model, under 30dB, in the same 17kg, 370×480×183.5mm IP65 housing as the smaller sizes. String current monitoring, type II DC/AC surge protection and residual current monitoring are standard. Peak efficiency is 98.6% and European efficiency 97.8%.

• 3–25kW three-phase, 2 independent MPPT
• 1100V max input, MPPT 140–1000V
• 98.6% max and 97.8% European efficiency
• PV oversizing to 150% of rated power
• Type II DC/AC surge protection built in
• VDE-AR-N 4105, EN 50549-1, C10/11 certified

How it works

The T series (G3) converts PV power to a three-phase 220/380V, 230/400V or 240/415V supply through two independent MPP trackers. Models up to 12kW take one string per tracker at up to 14A; from 15kW each tracker has two strings and 28A. The input accepts up to 1100V, with MPPT operation from 140V to 1000V and 600V rated, so long strings and east-west roofs on separate trackers are both possible.

Key features

Maximum DC input power is 150% of rated output on every model, from 4.5kW on the T3-G3 to 37.5kW on the T25-G3. Peak efficiency is 98.6%, European efficiency 97.8% and MPPT efficiency 99.8%. Models up to 12kW are convection-cooled and below 30dB; larger sizes use a fan. Type II surge protection on both DC and AC sides, insulation and residual current monitoring are standard, while AFCI and a DC switch are optional.

Installation and compatibility

All sizes share a 370×480×183.5mm IP65 housing of 17–21kg for wall mounting indoors or outdoors, with at least 300mm free at the sides and 500mm above, below and in front. FoxESS recommends a type A RCD where an external one is required. The manual also covers dual-string variants of the 8, 10 and 12kW models, marked (Dual).

The datasheet lists AS/NZS 4777.2, C10/11, EN 50549-1, PN-EN 50549-1, VDE-AR-N 4105, RD 1699, CEI 0-21, VDE V 0126-1-1 and UTE C 15-712-1 among its grid regulations. Certificates published by FoxESS include VDE-AR-N 4105, EN 50549-1 and NC RfG (DEKRA), C10/11 and EN 62109-1/-2 safety.

Monitoring and settings

An optional Wi-Fi or 4G module connects the inverter to the FoxCloud app and web portal; the LCD and touch key give local status. A meter on the grid side enables export limitation, and RS485, DRM and emergency-stop inputs are available for grid-operator and site control.

Questions and answers