The Solis S5-GR3P17K is a 17kW three-phase on-grid solar inverter with two MPPT trackers, 98.7% maximum efficiency, and an 8-year warranty. It accepts up to 25.5kW of PV input at a maximum 1100V.
98.7% efficiency, at the top of the class. Most inverters at this rating run 97.4-97.6%; 98.7% is at the ceiling of what string inverters achieve. Across fifteen years, every percentage point lost in DC-to-AC conversion is generation you paid for and never received. When you compare inverters at the same capacity, efficiency and warranty are the two specifications that genuinely separate them, and this unit leads on both.
A useful capacity that most brands skip. 17kW sits between the common 15kW and 20kW steps, and that matters more than it sounds. Array sizing rarely lands neatly on a round number if your roof supports 24 or 25kW of panels, a 15kW inverter clips your peak generation while a 20kW inverter is capacity you paid for and never use. At 17kW with 25.5kW of input headroom, this unit fits arrays that fall awkwardly between the standard ratings. Send our team your panel count and we will tell you honestly whether 17kW is the efficient fit or whether 15kW or 20kW serves you better.
How an on-grid system works. No batteries, nothing to replace in five years, nothing to maintain. The inverter converts DC from your panels to AC, powers your load through the day, and exports the surplus through net metering so your meter runs backward the credit offsets your night and weekend consumption. For a commercial premises, factory, or school with real daytime load, a grid-tied system at 17kW turns a large roof into the shortest-payback asset on the balance sheet.
25.5kW of PV input. That 1.5:1 DC-to-AC ratio lets you build a substantially larger array than the nameplate suggests. Panels rarely hit rated output in real conditions, so an oversized array fills more of the inverter's capacity through more of the day. The wide 160-1000V MPPT range with an 1100V maximum gives your installer real flexibility in string design.
Two MPPT trackers. Each handles 32A operating current (40A short-circuit), managing its own string independently so a commercial roof facing multiple directions, or with sections shaded through the day, does not drag the whole array down to the weakest string.
The 8-year warranty on the single point of failure. Eight years is three more than most inverters in this class offer, on the component most likely to fail before your panels do. On a commercial installation, a failure in year six means downtime plus a replacement bill.
SolarClue is India's managed solar marketplace. Our team confirms this inverter matches your panel array, your three-phase supply and your DISCOM's net metering requirements before you order. Compare it against Growatt and Deye on our platform and if 17kW is an awkward fit for your array, we will say so and point you to the right rating. You book with a token payment rather than the full amount upfront. Supply and installation are coordinated through verified partners, and we handle Solis warranty support afterwards. Check the current on grid solar system price and talk to our team for a specification review and installation timeline in your city.
SolarClue is a leader in solar energy products and reliability across India. Power your energy future with industry-leading solar products and solutions at cost-effective solutions. If you’re staying in Nabadwip, West Bengal, or any other place in India, Solarclue.com can provide you with the best solar products in your budget only.
