GoodWe · Solar inverter model
SDT G2 Series
GoodWe SDT G2 is an earlier three-phase, dual-MPPT grid-tied inverter family documented in 4–15 kW and 17–25 kW schedules.
Specifications
| Specification | Value |
|---|---|
| Type | grid-tied string inverter |
| Supply phases | three |
| Rated AC power (kW) | 4, 5, 6, 8, 10, 12, 15, 17, 20 or 25, by exact model |
| MPPT count | 2 |
| Maximum input current (A) | 12.5 per tracker on 4–10 kW; 25/12.5 A on 12–15 kW; 25 A on 17–20 kW; 37.5/25 A on 25 kW |
| Maximum efficiency (%) | 98.2 on 4–8 kW, 98.3 on 10–15 kW and 98.4 on 17–25 kW |
| Euro efficiency (%) | 97.6 on 4–8 kW, 97.7 on 10–25 kW |
| Battery compatible | No |
| Warranty (years) | document-dependent; the March 2026 European terms give five years to covered SDT G2 units made before 1 January 2026 |
| IP rating | IP65 |
| Maximum input voltage V | 1000 on 4–15 kW; 1100 on 17–25 kW |
| MPPT voltage range (V) | 180–850 on 4–15 kW; 200–950 on 17–25 kW |
| AC overloading | up to 110% headline figure; exact model limits apply |
SDT G2 is an earlier GoodWe three-phase grid-tied inverter family. It has separate 4–15 kW and 17–25 kW schedules, all with two MPPTs.
Input-current and voltage schedules
Input current changes within the range. The 12 and 15 kW models allocate two strings to one tracker and one to the other, while the 25 kW model uses a three-string and two-string arrangement. These are tracker limits, not a permission to exceed the current, voltage or connector limits of an individual string.
The 4–15 kW group has a 1,000 V maximum input and a 180–850 V MPPT range. The 17–25 kW group has a 1,100 V maximum input and a 200–950 V MPPT range. The family also has headline allowances of up to 150% DC oversizing and 110% AC overloading. Array and output design still need the exact model’s voltage window, current and AC limits and site temperature assumptions.
This is a solar-only inverter. It has no direct battery connection and no backup supply.
Generation and supply status
GoodWe’s SDT G2 product and datasheet pages remain available, while its current central inverter catalogue foregrounds SDT G3. That leaves current new-supply status for SDT G2 unconfirmed. It does not make installed equipment unsupported, nor does it allow SDT G3 specifications to be copied across.
GoodWe’s March 2026 European warranty gives covered SDT G2 equipment made before 1 January 2026 five years. Its ten-year table for equipment made on or after that date names SDT G2 Plus+ and residential SDT G3, not the original SDT G2. Conditional extension wording applies only where every stated installer, power, monitoring and registration condition is met.
UK connection boundary
Even the smallest SDT G2 is three-phase and rated above 3.68 kW aggregate. Connection treatment is determined from current evidence for the exact code rather than from the family page.
Related entries
Manufacturer and reference sources
Brand
Reference type
Solar inverter model
Last reviewed
31 Jul 2026
Current status
UK new-supply status is unconfirmed.