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20 kW Solar Kits

20 kW Solar Kits

  • Talesun 400 XL SMA Inverter Solar Kit
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    20kW solar kit Talesun 400 XL, SMA inverter

    Talesun

    $22,300.00
    This high-power, low cost solar energy system generates 20000 watts (20 kW) of grid-tied electricity with (50) 400 watt Talesun TP6F72M-400(H) XL-size 144 half-cut cell monocrystalline modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7...
    TAL400-20kW-SMA
    $22,300.00
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  • 20kW Solar Kit Trina 400 XL, SMA inverter
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    20kW Solar Kit Trina 400 XL, SMA inverter

    Trina Solar

    $22,600.00
    This high-power, low cost solar energy system generates 20 kW of grid-tied electricity with (50) Trina 400 watt XL monocrystalline modules with silver frame, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect...
    TSM400-20kW-SMA
    $22,600.00
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  • Q.Cells 390 XL SMA Inverter Solar Kit
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    20.3kW solar kit Q.Cells 390 XL, SMA inverter

    Q.Cells

    $22,950.00
    This high-power, low cost solar energy system generates 20280 watts (20.3 kW) of grid-tied electricity with (52) 390 watt Q.Cells Q.PEAK-DUO-L-G5.2-390 XL-size 144 half-cut cell mono perc modules with silver frame, SMA Sunny Boy inverter, Sunny Portal...
    QC390-20kW-SMA
    $22,950.00
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  • Canadian 380 XL SMA Inverter Solar Kit
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    20.5kW solar kit Canadian Solar 380 XL, SMA inverter

    Canadian Solar

    $23,050.00
    This high-power, low cost solar energy system generates 20520 watts (20.5 kW) of grid-tied electricity with (54) 380 watt Canadian Solar CS3U-380MS XL-size 144 half-cut cell mono perc modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7...
    CS380-20kW-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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  • Mission 385 XL SMA Inverter Solar Kit
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    20kW solar kit Mission Solar 385 XL, SMA inverter

    Mission Solar

    $23,800.00
    These made in the USA solar energy panels generate 20020 watts (20 kW) of grid-tied electricity with (52) 385 watt Mission Solar MSE385SR9S XL-size 72-cell mono perc modules with silver frame, SMA Sunny Boy inverter, Sunny Portal 24/7 monitoring,...
    MSE385-20kW-SMA
    $23,800.00
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  • 20kW solar kit Axitec 400 XL, SMA Sunny Boy inverter AC-400MH/144S

    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
  • Q.Cells 390 XL Generac Inverter Solar Kit
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    15.6kW solar kit Q.Cells 390 XL, Generac hybrid inverter

    Q.Cells

    $25,050.00
    This high-power, low cost solar energy system generates 15600 watts (15.6 kW) of grid-tied or off-grid electricity with (40) 390 watt Q.Cells Q.PEAK-DUO-L-G5.2-390 XL-size 144 half-cut cell mono perc modules with silver frame, Generac hybrid inverter,...
    QC390-15kW-Generac
    $25,050.00
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  • Q.Cells 400 XL Solar Kit with SMA Inverter

    20kW solar kit Q.Cells 400 XL, SMA inverter

    Q CELLS

    $25,350.00
    This high-efficiency Q Cells solar power system generates 20kW (20000 watts) of grid-tied electricity with 50 Q Cells 400 watt XL monocrystalline modules with silver frames, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7...
    QC400-20kW-SMA
    $25,350.00
  • 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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  • Q.Cells 340 XL SMA Inverter Solar Kit
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    20kW solar kit Q.Cells 340 black, SMA inverter

    Q.Cells

    $25,450.00
    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
    $25,450.00
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  • Axitec 320 Solar Kit with SMA Inverter
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    20.1kW solar kit Axitec 320, SMA inverter

    Axitec Solar

    $26,150.00
    This Axitec Solar power system generates 20.1kW (20160 watts) of grid-tied electricity with 63 Axitec 320 watt monocrystalline modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect box, rooftop mounting,...
    AXI320-20kW-SMA
    $26,150.00
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  • Trina 310 SMA Inverter Solar Kit
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    20.1kW solar kit Trina 310, SMA inverter

    Trina Solar

    $26,500.00
    This high-efficiency Trina Solar power system generates 20.1kW (20150 watts) of grid-tied electricity with 65 Trina 310 watt monocrystalline all-black modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect...
    TSM310-20kW-SMA
    $26,500.00
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  • 20kW Solar Kit Trina 400 XL, Enphase Micro-inverter
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    20kW Solar Kit Trina 400 XL, Enphase Micro-inverter

    Trina Solar

    $26,800.00
    This high-power, low cost solar energy system generates 20 kW of grid-tied electricity with (50) Trina 400 watt XL monocrystalline modules with silver frame, Enphase micro-inverters, 24/7 panel monitoring, disconnect box, safety labels, rooftop mounting,...
    TSM400-20kW-Enphase
    $26,800.00
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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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  • Q.Cells 320 Solar Kit with SMA Inverter
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    20.1kW solar kit Q.Cells 320, SMA inverter

    Q CELLS

    $27,100.00
    This high-power Q Cells solar energy system generates 20.1kW (20160 watts) of grid-tied electricity with 63 Q Cells 320 watt monocrystalline all-black modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect...
    QC320-20kW-SMA
    $27,100.00
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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.