For a 100kW system, inverters can cost around $9,500. The mounting system holds the solar panels in place. However, it"s important to. The cost for a 100 kW solar installation typically ranges based on equipment quality, site readiness, and permitting. Price factors include panel efficiency, inverter type, racking, and labor hours required for design, installation, and commissioning. Financing options such as loans, leases, and Power Purchase Agreements (PPAs) can help manage. Solar inverter cabinet costs aren't just about metal boxes and switches. Prices typically range between $8,000 and $45,000+ depending on these critical factors: "The sweet spot for commercial projects? 500kW cabinets with hybrid cooling – delivering 98% efficiency at $28K-$32K. Grid-tie 100kw solar system kit is the cheapest option since it includes only panels. This high-power, low cost solar energy system generates 100,300 watts (100 kW) of grid-tied electricity with (170) 590 watt Axitec XXL bi-facial model AC-590TGB/144, SMA Sunny High-power three-phase inverter (s), DC string combiners, 24/7 monitoring,. Compare price and performance of the Top.