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Compare 4kW Solar Kits

Compare price and performance of the Top Brands to find the best 4 kW solar system. Buy the lowest cost 4kW solar kit priced from $1.36 to $2.25 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 to review parts list, specifications, and prices for DIY or FULL-SERVICE installation.

What You Get with Every PV System

  • Solar panels, inverters, roof mounting, cables, BOS
  • 14 to 16 panels generate 500 kWh / mo (varies)
  • UL Certified with up to 30 year manufacturer warranty
  • Mount on rooftop or ground (optional); up to 300 sf
  • Flat-rate shipping with lift-gate service to continental U.S.
  • Installation instructions and optional permit plans
  • 24/7 performance monitoring via web and smartphone
  • Lifetime technical support
4kW SolarEdge Kits | 4kW Micro Kits | 4kW SMA Kits | String vs Edge vs Micro? | 4kW Battery Kits | 4kW Ground Mount

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4kW Solar Kit Trina 255 Black Fronius Inverter Rooftop 4kW Solar Kit Q.Cells 275 Fronius Inverter, Roof mount 4kW Solar Kit Talesun 260P Fronius inverter 4kW Solar Kit, Canadian 280 BLACK panels, SMA Sunny Boy, Rooftop
4kW Solar Kit Trina 255 Black, Fronius, Rooftop
Ships in 1 to 2 Weeks
Your Price: $5,800.00
4.4kW Solar Kit Q.Cells 275, Fronius inverter, Roof mount
Usually Ships in 1 to 2 Weeks
Your Price: $6,000.00
4.1kW Solar Kit Talesun 260, Fronius inverter, Mounting
Usually Ships in 1 to 2 Weeks
Your Price: $6,200.00
4.2kW Solar Kit, Canadian 280M, SMA Inverter, Rooftop
Usually Ships in 1 to 2 Weeks
Your Price: $6,400.00
4kW Solar Kit Q.Cells 275 APS Micro Inverter, Roof mount 4kW Solar Kit Canadian 345M SolarEdge Rooftop 4kW Solar Kit Silfab SLA300M SMA 4kW Solar Kit Trina TSM-255P Black Enphase inverters
4.4kW Solar Kit Q.Cells 275, APS Micro, Roof mount
Ships in 1 to 2 Weeks
Your Price: $6,800.00
4.1kW PV Kit Canadian 345M, SolarEdge Optimizer, Rooftop
Usually Ships in 1 to 2 Weeks
Your Price: $6,800.00
4.2kW PV Kit Silfab 300 Black, SMA Inverter, Rooftop
Ships in 1 to 2 Weeks
Your Price: $7,000.00
4kW Solar Kit Trina 255 Black, Enphase Micro, Rooftop
Ships in 1 to 2 Weeks
Your Price: $7,200.00
4kW PV Kit Silfab 360 XL, SolarEdge Inverter-Optimizer 4kW PV Kit Q.Cells 325 XL, SolarEdge Inverter-Optimizer 4kW Solar Kit Mitsubishi MLE280 SMA inverter 4kW Solar Kit Talesun 260P Enphase Micro inverter
4.3kW Solar Kit Silfab 360 XL, SolarEdge Optimizer, Rooftop
Ships in 1 to 2 Weeks
Your Price: $7,250.00
4.5kW PV Kit Q.Cells 325 XL, SolarEdge Optimizer, Rooftop
Ships in 1 to 2 Weeks
Your Price: $7,300.00
4.2 kW PV Kit, Mitsubishi MLE280 Black, SMA Inverter, rooftop
Usually Ships in 1 to 2 Weeks
Your Price: $7,400.00
4.1kW Solar Kit Talesun 260, Enphase Micro, Mounting
Ships in 1 to 2 Weeks
Your Price: $7,500.00
4kW PV Kit SolarWorld 345 XL SolarEdge Inverter 4kW Solar Kit, Canadian 280 BLACK panels, Enphase inverter, Rooftop 4kW LG 300 Solar Kit 4kW Solar Kit Trina 250W Enphase micro-inverter
4.1kW PV Kit SolarWorld 345 XL, SolarEdge Optimizer, Rooftop
Ships in 1 to 2 Weeks
Your Price: $7,500.00
4.2kW Solar Kit, Canadian 280M, Enphase Micro, Rooftop
Usually Ships in 1 to 2 Weeks
Your Price: $7,800.00
4.2kW PV System, LG300 panels, Fronius inverter, roof mount
Usually Ships in 1 to 2 Weeks
Your Price: $8,000.00
4.1kW Solar Kit Trina 260W Enphase Micro Inverter
Ships in 1 to 2 Weeks
Your Price: $8,200.00
   
 

FreeCleanSolar has a big selection of affordable 4 kW PV systems for sale. These 4 kW size grid-connected solar kits include solar panels, DC-to-AC inverter, rack mounting system, hardware, cabling, installation instructions and optional permit plans. 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 4kW Solar Kit requires up to 300 square feet of space. Ideal output will be achieved with an unobstructed south-facing view of the sun for maximum solar power. 4kW or 4 kilowatts is 4,000 watts of DC direct current power. This could produce an estimated 300 to 750 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 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 4kW PV systems can generate.


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