Solar inverters · Compare

Fronius Symo GEN24 8.0 vs SolaX X3-IES-8K

AC power: Fronius Symo GEN24 8.0 8 kW, SolaX X3-IES-8K 8 kW. Both models win equally often (3 of 10 points).

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Both models in detail

Who wins where

  • Fronius Symo GEN24 8.0
  • SolaX X3-IES-8K
PerformanceEfficiencyElectricalConnectivity & smartDimensions & weight
Performance: Fronius Symo GEN24 8.0 61, SolaX X3-IES-8K 66; Efficiency: Fronius Symo GEN24 8.0 86, SolaX X3-IES-8K 75; Electrical: Fronius Symo GEN24 8.0 49, SolaX X3-IES-8K 69; Connectivity & smart: Fronius Symo GEN24 8.0 37, SolaX X3-IES-8K 37; Dimensions & weight: Fronius Symo GEN24 8.0 35, SolaX X3-IES-8K 9

Biggest differences

FactSymo GEN24 8.0X3-IES-8K
MPPT voltage min.224 V110 V
Weight23.4 kg35 kg
Max. PV array power12 kWp16 kWp
Max. input current per MPPT25 A20 A
MPPT voltage max.800 V950 V
All specifications ↓

Score per area = position (0–100) relative to all 263 models in this category; higher is better.

Technical specificationsFroniusSymo GEN24 8.0SolaXX3-IES-8K
Performance
AC power8 kW18 kW1
Max. PV array power12 kWp216 kWp✓3
MPP trackers2223
Efficiency
Max. efficiency98.2 %2–
European efficiency97.8 %✓297.7 %3
Noise
Noise47 dB(A)2–
Electrical
MPPT voltage min.224 V2110 V✓3
MPPT voltage max.800 V2950 V✓3
Max. input current per MPPT25 A✓220 A3
Phases3131
Connectivity & smart
Hybrid (battery-ready)No1No1
Backup powerYes2Yes3
Wi-Fi / monitoringYes2–
Dimensions & weight
IP ratingIP662IP663
Width529 mm2717 mm3
Height595 mm2405 mm3
Depth180 mm2209.5 mm3
Weight23.4 kg✓235 kg3

Frequently asked questions

Which is better: the Fronius Symo GEN24 8.0 or the SolaX X3-IES-8K?

AC power: Fronius Symo GEN24 8.0 8 kW, SolaX X3-IES-8K 8 kW. Both models win equally often (3 of 10 points).

What is the AC power of the Fronius Symo GEN24 8.0 and the SolaX X3-IES-8K?

Fronius Symo GEN24 8.0: 8 kW. SolaX X3-IES-8K: 8 kW.

Which is better on MPPT voltage min.: the Fronius Symo GEN24 8.0 or the SolaX X3-IES-8K?

SolaX X3-IES-8K: 110 V. Fronius Symo GEN24 8.0: 224 V.

Which is better on weight: the Fronius Symo GEN24 8.0 or the SolaX X3-IES-8K?

Fronius Symo GEN24 8.0: 23.4 kg. SolaX X3-IES-8K: 35 kg.

How we collect and check this data →

Sources

  1. ENA Type Test Register (inverters) — Energy Networks Association (ENA) · accessed 27 Sept 2026
  2. Fronius Symo GEN24 & GEN24 Plus 3.0 - 10.0 kW – datasheet, EN V05 (May 2025) — Fronius International GmbH · accessed 27 Sept 2026
  3. X3-IES Series All-in-one Residential ESS Datasheet, V1.8 — SolaX Power · accessed 17 Oct 2026