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20 kW Solar Kits

20 kW Solar Kits

  • 20kW solar kit Axitec 410 XL, SMA inverter
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    20kW solar kit Axitec 410 XL, SMA inverter

    Axitec Solar

    $22,450.00
    This high-power, low cost solar energy system generates 20090 watts (20 kW) of grid-tied electricity with (49) 410 watt Axitec AC-410 XL-size modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop...
    AXI410-20kW-SMA
    $22,450.00
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  • Trina Solar 410 XL Solar Kit with SMA Inverter
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    20kW solar kit Trina Solar 410 XL, SMA inverter

    Trina Solar

    $23,000.00
    This high-power, low cost solar energy system generates 20090 watts (20 kW) of grid-tied electricity with (49) 410 watt Trina TSM-410 XL-size 144 half-cut cell monocrystalline modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7...
    TSM410-20kW-SMA
    $23,000.00
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  • Silfab SIL400 XL, SMA inverter Solar Kit
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    20kW solar kit Silfab 400 XL, SMA inverter

    Silfab Solar

    $23,050.00
    This solar energy system generates 20000 watts (20 kW) of grid-tied electricity with (50) 400 watt SIL-400-NU XL-size modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting, safety labels, and permit-ready...
    SIL400-20kW-SMA
    $23,050.00
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  • 20.1kW Solar Kit Peimar 315, SMA inverter
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    20.1kW Solar Kit Peimar 315, SMA inverter

    Peimar

    $23,800.00
    This affordable, high-efficiency 20.1 kW solar kit includes (64) Peimar 315 watt black-frame model SG315M-BF 60-cell monocrystalline modules, SMA Sunny Boy inverter, safety disconnect, monitoring, rooftop mounting, system design, permit plan and safety...
    SG315-20kW-SMA
    $23,800.00
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  • 20.1kW solar kit Mission 420 XL, SMA inverter
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    20.1kW solar kit Mission 420 XL, SMA inverter

    Mission Solar

    $24,050.00
    This high-powered, made in USA solar energy system generates 20160 watts (20.1 kW) of grid-tied electricity with (48) 420 watt Mission MSE420SX6W XL-size modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box,...
    MSE420-20kW-SMA
    $24,050.00
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  • 20kW solar kit Axitec 400 XL, SMA Sunny Boy inverter AC-400MH/144S
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    20kW solar kit Axitec 400 XL, SMA inverter

    Axitec Solar

    $24,300.00
    This 20 kW solar kit includes (50) Axitec 400 XL model AC-400MH/144S Mono-Perc 144-cell modules, SMA Sunny Boy inverter, safety disconnect, monitoring, rooftop mounting, system design, permit plan and safety labels. The German engineered Axitec solar...
    AXI400-20kW-SMA
    $24,300.00
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  • VSUN 310 Solar Kit with SMA Inverter
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    20.1kW solar kit VSUN 310, SMA inverter

    VSUN

    $25,450.00
    This low cost PV solar system generates 20.1kW (20150 watts) of grid-tied DC power. The solar kit includes 65 VSUN 310 watt monocrystalline all-black modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect...
    VS310-20kW-SMA
    $25,450.00
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  • Silfab SIL370 black, SMA inverter Solar Kit

    20.3kW solar kit Silfab 370 Black, SMA inverter

    Silfab Solar

    $25,950.00
    This solar energy system generates 20350 watts (20.3 kW) of grid-tied electricity with (55) 370 watt SIL-370-BK all-black modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting, safety labels, and permit-ready...
    SIL370-20kW-SMA
    $25,950.00
  • Q.Cells 340 XL SMA Inverter Solar Kit
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    20kW solar kit Q.Cells 340 black, SMA inverter

    Q.Cells

    $26,050.00
    This high-power, low cost solar energy system generates 20060 watts (20 kW) of grid-tied electricity with (59) 340 watt Q.Cells Q.PEAK-DUO-BLK-G6-340120 half-cut cell mono Q.ANTUM all-black modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring,...
    QC340-20kW-SMA
    $26,050.00
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  • Canadian 400 Black, SMA inverter Solar Kit
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    20kW solar kit Canadian 400 Black, SMA inverter

    Canadian Solar

    $26,150.00
    This high-power solar energy system generates 20000 watts (20 kW) of grid-tied electricity with (50) 400 watt Canadian black modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting, safety labels, and permit-ready...
    CS400-20kW-SMA
    $26,150.00
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  • Mission MSE345 black, SMA inverter Solar Kit
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    20kW solar kit Mission 345 Black, SMA inverter

    Mission Solar

    $26,150.00
    This high-powered, made in USA solar energy system generates 20160 watts (20 kW) of grid-tied electricity with (58) 345 watt Mission MSE345SX5T all-black modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting,...
    MSE345-20kW-SMA
    $26,150.00
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  • 20.1kW solar kit Silfab 330 black, SMA inverter
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    20.1kW solar kit Silfab 330 black, SMA inverter

    Silfab

    $27,050.00
    This high-quality 20.1 kW solar kit includes (61) Silfab 330 watt all-black model SIL-330 BL Mono-Perc 126-cell modules, SMA Sunny Boy inverter, safety disconnect, monitoring, rooftop mounting, system design, permit plan and safety labels. The made in...
    SIL330-20kW-SMA
    $27,050.00
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  • 20.1kW solar kit Q.Cells 380 XL, SMA inverter
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    20.1kW solar kit Q.Cells 380 XL, SMA inverter

    Q.Cells

    $27,400.00
    This pemium solar energy system generates 20140 watts (20.1 kW) of grid-tied electricity with (53) 380 watt Q.Cells 380 black modules, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting, safety labels, and permit-ready...
    QC380-20kW-SMA
    $27,400.00
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  • 20kW solar kit Axitec 410 XL, Enphase Micro-inverter
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    20kW solar kit Axitec 410 XL, Enphase Micro-inverter

    Axitec Solar

    $27,600.00
    This high-power, low cost solar energy system generates 20090 watts (20 kW) of grid-tied electricity with (49) 410 watt Axitec AC-410 XL-size modules with silver frame, Enphase Micro-inverters, IQ combiner box with Envoy 24/7 panel monitoring, disconnect...
    AXI410-20kW-Enphase
    $27,600.00
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  • 20kW solar kit Axitec 410 XL, SolarEdge HD optimizers
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    20kW solar kit Axitec 410 XL, SolarEdge HD optimizers

    Axitec Solar

    $28,200.00
    This high-power, low cost solar energy system generates 20090 watts (20 kW) of grid-tied electricity with (49) 410 watt Axitec AC-410 XL-size modules with silver frame, SolarEdge HD inverter, module optimizers, 24/7 monitoring, disconnect box, rooftop...
    AXI410-20kW-SolarEdge
    $28,200.00
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  • Silfab SIL400 XL Enphase Micro-inverter Solar Kit
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    20kW solar kit Silfab 400 XL, Enphase Micro-inverter

    Silfab Solar

    $28,400.00
    This solar energy system generates 20000 watts (20 kW) of grid-tied electricity with (50) 400 watt SIL-400-NU XL-size modules, Enphase Micro-inverters, IQ combiner box with Envoy 24/7 panel monitoring, disconnect box, safety labels, rooftop mounting, and...
    SIL400-20kW-Enphase
    $28,400.00
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Compare price and performance of the Top Brands to find the best 20 kW solar system with up to 30 year warranty. Buy the lowest cost 20kW solar kit priced from $1.12 to $2.10 per watt with the latest, most powerful solar panels, module optimizers, or micro-inverters. For home or business, save 30% with a solar tax credit.

Click on a solar kit below to review parts list and options for battery storage, EV charging and installation.

What You Get With a 20kW Solar Kit

  • Up to 72 solar panels generate 2,600 kWh per month (varies by location)
  • UL test certified with up to 30 year manufacturer warranty
  • Grid-tied inverters, optimizers or micro-inverters
  • Mount on rooftop or ground (optional); up to 1,300 sf
  • Flat-rate shipping with lift-gate service to continental U.S.
  • System design and permit plan with electrical drawing, structural engineering
  • Installation instructions
  • 24/7 performance monitoring via web and smartphone
  • Lifetime technical support
  • Qualifies for all tax credits, rebates and incentives
  • Add-on options for battery storage, ground mounting, EV charging or full-service installation

Featuring daily updates with the lowest prices on solar panels, SunWatts has a big selection of affordable 20 kW PV systems for sale. These 20 kW size grid-connected solar kits include solar panels, DC-to-AC inverter, rack mounting system, hardware, cabling, permit plans and instructions. These are complete PV solar power systems that can work for a home or business, with just about everything you need to get the system up and running quickly. The kit prices shown include hardware components only; click on any kit to add your choice of full-service installation options for rooftop or ground mount.

A 20kW solar kit requires up to 1,300 square feet of space. 20kW or 20 kilowatts is 20,000 watts of DC direct current power. This could produce an estimated 2,600 kilowatt hours (kWh) of alternating current (AC) power per month, assuming at least 5 sun hours per day with the solar array facing South. The highest output will be achieved with an unobstructed south-facing view of the sun for maximum solar power. The actual power generated will vary based on location, equipment and installation factors. Refer to your electric utility bill to find the actual kWh used per month and compare it to how much power these low cost 20kW PV systems can generate.