Solis · 12.0 kW · 3-phase dual-MPPT inverter
Solis S5 12kW three-phase inverter
The Solis S5 GR3P 12K is the 12 kW step in the three-phase S5 line. Reach for it when the array outgrows a 10 kW design but a 15 kW unit is more inverter than the roof can feed.
Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.
Description
Sizing the inverter to the array rather than the other way round is what this model is for. The S5 GR3P range in our listings runs from 5 kW to 15 kW, and 12 kW is the slot between the two most common commercial picks, sized for roofs that have outgrown the 10 without justifying the 15. Because it shares the platform, moving a quote up or down a size changes almost nothing else in the design pack. Dual MPPT covers split arrays and the with-DC build includes isolation at the unit. The page shows the ex-VAT trade price, fixed at any quantity.
Specification
| Brand | Solis |
|---|---|
| Part number | SOL-S5-GR3P-12K-DC |
| Power rating | 12 kW |
| Phase | Three-phase |
| Condition | New |
| Category | Inverters · Main Units |
| Delivery method | Parcel courier |
What it pairs with
Monitor it through the Solis S5 Wi-Fi data logger in the 4-pin fitting, or go cellular with the S1 Wi-Fi plus 4G stick where the site network is poor. For export-limited connections, pair the EPM3-5G-PRO Export Power Manager with a three-phase meter from our Solis listings, such as the Acrel inline meter. Confirm exact fitment on Solis's current pairing documentation for your unit revision.
Needs a three-phase supply, so confirm the incoming service before quoting. String design works around two MPPT inputs. For anything this page can't settle, ask the trade desk before ordering or consult a competent installer.
Often bought alongside
Last updated 2026-07-19