GoodWe GW15K-ET-20 vs SolaX X3-IES-15K
AC power: GoodWe GW15K-ET-20 15 kW, SolaX X3-IES-15K 15 kW. The SolaX X3-IES-15K is better on 5 of 10 comparable points.
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Both models in detail
Who wins where
- GoodWe GW15K-ET-20
- SolaX X3-IES-15K
Biggest differences
| Fact | GW15K-ET-20 | X3-IES-15K |
|---|---|---|
| Max. input current per MPPT | 16 A | 32 A |
| MPP trackers | 3 | 2 |
| Weight | 25 kg | 37 kg |
| Max. PV array power | 24 kWp | 30 kWp |
| MPPT voltage max. | 850 V | 950 V |
| MPPT voltage min. | 120 V | 110 V |
Score per area = position (0–100) relative to all 263 models in this category; higher is better.
| Technical specifications | GoodWeGW15K-ET-20 | SolaXX3-IES-15K |
|---|---|---|
| Performance | ||
| AC power | 15 kW1 | 15 kW2 |
| Max. PV array power | 24 kWp1 | 30 kWp✓3 |
| MPP trackers | 3✓1 | 23 |
| Efficiency | ||
| Max. efficiency | 98.2 %1 | – |
| European efficiency | 97.5 %1 | 97.7 %✓3 |
| Electrical | ||
| MPPT voltage min. | 120 V1 | 110 V✓3 |
| MPPT voltage max. | 850 V1 | 950 V✓3 |
| Max. input current per MPPT | 16 A1 | 32 A✓3 |
| Phases | 31 | 32 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | Yes✓1 | No2 |
| Backup power | Yes1 | Yes3 |
| Wi-Fi / monitoring | Yes1 | – |
| Dimensions & weight | ||
| IP rating | IP661 | IP663 |
| Width | 496 mm1 | 717 mm3 |
| Height | 460 mm1 | 405 mm3 |
| Depth | 221 mm1 | 209.5 mm3 |
| Weight | 25 kg✓1 | 37 kg3 |
Frequently asked questions
Which is better: the GoodWe GW15K-ET-20 or the SolaX X3-IES-15K?
AC power: GoodWe GW15K-ET-20 15 kW, SolaX X3-IES-15K 15 kW. The SolaX X3-IES-15K is better on 5 of 10 comparable points.
What is the AC power of the GoodWe GW15K-ET-20 and the SolaX X3-IES-15K?
GoodWe GW15K-ET-20: 15 kW. SolaX X3-IES-15K: 15 kW.
Which is better on max. input current per MPPT: the GoodWe GW15K-ET-20 or the SolaX X3-IES-15K?
SolaX X3-IES-15K: 32 A. GoodWe GW15K-ET-20: 16 A.
Which is better on MPP trackers: the GoodWe GW15K-ET-20 or the SolaX X3-IES-15K?
GoodWe GW15K-ET-20: 3. SolaX X3-IES-15K: 2.
Related comparisons
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Sources
- ET G2 Series 6–15 kW hybrid inverter (EMEA) – datasheet, EN-EMEA V1.1 (20241022) — GoodWe Technologies Co., Ltd. · accessed 27 Sept 2026
- ENA Type Test Register (inverters) — Energy Networks Association (ENA) · accessed 27 Sept 2026
- X3-IES Series All-in-one Residential ESS Datasheet, V1.8 — SolaX Power · accessed 17 Oct 2026