
Solis S5-GC40K 40kW 3 Phase Quad MPPT Inverter c/w Isolator 40.0kW
S5-GC40K
Solis S5-GC40K 40kW 3-Phase Inverter – High-Efficiency Commercial Inverter with Quad MPPT & Integrated Isolator
The Solis S5-GC40K is a 40kW three-phase inverter designed for commercial solar installations requiring high output, advanced flexibility, and safe operation. With quad MPPT inputs, >150% DC/AC ratio, and intelligent monitoring capabilities, it offers powerful system control, efficiency, and long-term performance in a robust and compact form.
- Quad MPPT Input: Supports multiple roof orientations and optimises string-level performance for greater design flexibility.
- High Conversion Efficiency: Delivers up to 98.8% efficiency with >150% DC/AC oversizing for maximised energy harvest.
- Advanced Monitoring: Features I-V curve scan, string-level diagnostics, and export power control with RS485, WiFi, and GPRS options.
- Robust Safety Features: Includes AFCI fire risk protection, integrated isolator, PID recovery, and intelligent fan cooling.
- Built for Commercial Use: IP66-rated, transformerless design supports high-power modules and withstands harsh environmental conditions.
Technical Specification
- Rated Output Power: 40kW
- Max. Output Power: 44kW
- Max. Output Current: 66.9A
- Ingress Protection: IP66
- Dimensions & Weight: 647 x 629 x 252 mm, 42.1kg
✅ Deploy the Solis S5-GC40K for powerful, flexible, and reliable solar generation across commercial and industrial PV systems!

Product | MPPT Inverter |
Type | MPPT |
Nominal Power Output | 40.0 kW |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.