Solis · 15.0 kW · 3-phase dual-MPPT inverter
Solis S5 15kW three-phase inverter
The Solis S5 GR3P 15K is the largest three-phase unit in the S5 range we stock. It is the pick for bigger commercial roofs, putting the whole array behind one inverter instead of splitting the job across smaller units.
Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.
Description
One larger inverter simplifies a commercial job: one fixing, one AC run, one point of isolation, one unit to commission and one to explain to the client. At 15 kW this is the ceiling of the S5 GR3P line-up we list, which makes it the default for the biggest roofs the range covers. Dual MPPT still gives two string inputs for split-pitch buildings, and the with-DC build carries isolation on board. If a survey lands between sizes, the 10 and 12 kW siblings share the platform, so the design pack barely changes. Trade pricing is ex VAT on the page and identical at any volume.
Specification
| Brand | Solis |
|---|---|
| Part number | SOL-S5-GR3P-15K-DC |
| Power rating | 15 kW |
| Phase | Three-phase |
| Condition | New |
| Category | Inverters · Main Units |
| Delivery method | Parcel courier |
What it pairs with
Commission it with the Solis S5 Wi-Fi data logger, 4-pin fitting, or the S1 Wi-Fi plus 4G cellular stick for sites without usable broadband. Export-limited connections pair the EPM3-5G-PRO Export Power Manager with a three-phase meter from our Solis listings, for example the Eastron V2 with CT. Check both against Solis's current pairing list for your unit revision before ordering the accessories.
Three-phase supply required. This is the top of the S5 GR3P range we carry, so arrays beyond it need a different design conversation. 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