20 kW Solar Kits

20 kW Solar Kits

  • 20.2kW solar kit CSUN 390 XL, SMA Sunny Boy (CSUN390-20kW-SMA)
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    20.2kW solar kit CSUN 390 XL, SMA Sunny Boy

    CSUN Solar

    $23,300.00
    This low cost 20.2 kW solar system generates 20280 watts of grid-tied DC power. The solar kit includes 52 CSUN 390 XL model CSUN390-72MH made in the USA solar panels, SMA Sunny Boy inverter, monitoring and rooftop mounting. This is a total system package...
    CSUN390-20kW-SMA
    $23,300.00
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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

    $23,300.00
    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
    $23,300.00
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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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  • 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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  • 20.1kW solar kit Silfab 380 XL, SMA inverter
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    20.1kW solar kit Silfab 380 XL, SMA inverter

    Silfab

    $24,500.00
    This high-quality 20.1 kW solar kit includes (53) Silfab 380 watt XL model SIL-380 NT Mono-Perc 72-cell modules, SMA Sunny Boy inverter, safety disconnect, monitoring, rooftop mounting, system design, permit plan and safety labels. The made in North...
    SIL380-20kW-SMA
    $24,500.00
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  • Q.Cells 400 XL Solar Kit with SMA Inverter
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    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
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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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  • Mission 375 XL Solar Kit with SMA Inverter

    20.2kW solar kit Mission 375 XL, SMA inverter

    Mission Solar Energy

    $26,100.00
    This grid-tied Mission Solar Energy PV system produces 20.2kW (20250 watts) of electricity with 54 Mission 375 watt monocrystalline XL modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect box, rooftop...
    MSE375-20kW-SMA
    $26,100.00
  • 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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  • 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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  • 20kW solar kit Trina 400 XL, Enphase Micro-inverter
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    20kW solar kit Trina 400 XL, Enphase Micro-inverter

    Trina

    $27,550.00
    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
    $27,550.00
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  • Canadian 320 SMA Inverter Solar Kit
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    20kW solar kit Canadian 320, SMA inverter

    Canadian Solar

    $27,800.00
    This Canadian Solar power system generates 20kW (20160 watts) of grid-tied electricity with 63 Canadian 320 watt monocrystalline all-black modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect box, rooftop...
    CS320-20kW-SMA
    $27,800.00
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  • Mission 310 Solar Kit with SMA Inverter
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    20.1kW solar kit Mission 310, SMA inverter

    Mission Solar Energy

    $28,100.00
    This high-power PV energy system generates 20.1kW (20150 watts) of grid-tied electricity with 65 Mission 310 watt monocrystalline all-black modules, SMA Sunny Boy inverter with emergency power supply, Sunny Portal 24/7 monitoring, disconnect box, rooftop...
    MSE310-20kW-SMA
    $28,100.00
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  • 20kW solar kit Trina 400 XL, SolarEdge HD optimizers
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    20kW solar kit Trina 400 XL, SolarEdge HD optimizers

    Trina

    $28,350.00
    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, module optimizers, SolarEdge HD-wave inverter, 24/7 panel monitoring, disconnect box, safety...
    TSM400-20kW-SolarEdge
    $28,350.00
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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.