Fox ESS · Solar inverter model
T Series inverter
Fox ESS T Series G3 is a current UK three-phase grid-tied solar inverter family covering 3 to 25 kW.
Specifications
| Specification | Value |
|---|---|
| Type | grid-tied string inverter |
| Supply phases | three |
| Rated AC power (kW) | 3 to 25 |
| Maximum DC input (kW) | 4.5 to 37.5 across T3-G3 to T25-G3 |
| MPPT count | 2 |
| Maximum input current (A) | 14 per MPPT on smaller ratings; 28 per MPPT on larger ratings |
| Maximum efficiency (%) | 98.6 |
| Euro efficiency (%) | 97.8 |
| Maximum MPPT efficiency (%) | 99.8 |
| Battery compatible | no |
| Warranty (years) | 5 from installation, capped at 65 months from manufacture; extensions conditional |
| IP rating | IP65 |
| Monitoring | FoxCloud 2.0 |
Fox ESS T Series G3 is the three-phase grid-tied family in the current UK schedule. Fox ESS’s global catalogue also uses the broader T Series name for a separate schedule extending to 30 kW, so the generation and full model code distinguish the two ranges.
G3 string inputs and efficiency
The G3 product page covers three-phase solar conversion without a direct battery connection. String inputs change as power rises, so string design and model comparison require the complete model name.
The maximum, European and MPPT efficiencies are different test metrics rather than expected annual system yield.
T Series G3 with separate AC-coupled storage
T Series is a solar inverter, not a hybrid inverter. Adding a battery requires separate AC-coupled storage equipment with its own model-specific documents and conversion limits.
For an existing system, the rating label distinguishes G3 from earlier T Series units. Datasheet limits, firmware instructions and warranty terms should be taken from the matching generation rather than the broad family name.
The matching generation also determines the applicable warranty policy and whether an extension route applies.
Related entries
Manufacturer and reference sources
Brand
Reference type
Solar inverter model
Last reviewed
23 Jul 2026
Current status
Current in the manufacturer's UK range.