28kW Growatt Commercial Hybrid Solar Kit | 44.64kW Solar + 46.08kWh Battery (UL9540 Certified)

Put solar energy to work for your business with the 28kW Growatt Commercial Hybrid Solar Kit. This equipment package combines 72 Canadian Solar 620W bifacial panels, a Growatt WIT 28K-HU-US L2 inverter and one RCS-R45K battery rack for 44.64kW of rated solar capacity and 46.08kWh of nominal storage.

Three-Phase Power for Your Business

Designed for compatible 208V or 220V three-phase installations, this kit can help businesses use more of their own solar energy and back up priority equipment. Battery controls can also support peak-demand management when matched to your electricity tariff and usage; savings depend on the project.

More Solar Energy to Use and Store

The 44.64kW panel array is larger than the inverter's 28kW AC rating to capture more energy outside peak sunlight hours and support battery charging when conditions allow. Solar production varies with weather, shade and system limits; the panel rating is not the system's AC output.

Canadian Solar Panels for Demanding Weather

Canadian Solar TOPBiHiKu6 panels use N-type TOPCon cells and double-glass bifacial construction. Their specified -40°C to +85°C operating range and snow/wind load ratings up to 5,400/4,000 Pa support demanding Canadian installations, subject to the manufacturer's mounting requirements and site-specific structural assessment. Reflected light reaching the rear can add generation, but snow coverage and shading still reduce production.

Battery Backup for Priority Loads

The 46.08kWh LiFePO4 battery rack provides storage for later use and shorter-duration backup. The HU inverter supports automatic transfer to properly connected backup loads during an outage. Available power and runtime depend on battery charge, temperature, settings and the equipment running. A second matching rack can increase nominal storage to 92.16kWh, subject to the final system design, without increasing the inverter's 28kW rating.

The battery is IP20 indoor equipment and needs a dry, suitable temperature-controlled location; its charging range is 0°C to 55°C. The inverter's IP66 enclosure does not make the whole package outdoor-rated.

What's Included

• 1 × Growatt WIT 28K-HU-US L2 28kW hybrid inverter
• 72 × Canadian Solar 620W bifacial panels — 44.64kW total
• 1 × RCS-R45K high-voltage LiFePO4 battery rack — 46.08kWh nominal storage

Plan Your Installation

This is an equipment package, not a turnkey installed system. Mounting, PV wiring, battery interconnects, protection, disconnects, metering, permits and professional installation must be specified and quoted for your site. Tigo rapid-shutdown devices are separately priced and not included; required devices and compatibility must be confirmed in the final design. Generator integration can be designed separately; a generator is not included.

Contact ROCKSOLAR with your location, service voltage, electricity usage and priority loads. Grid connection and export require the applicable approvals.

• Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
• Returns: You may return or exchange products within 30 days of receiving your order. Items must be in original condition with proof of purchase.
• If your item is defective or damaged due to manufacturing issues, we’ll gladly replace it at no additional cost.