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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 $1.15 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 BELOW to review prices, parts list and options for ground mounting, battery storage or EV charging.

4kW SolarEdge Kits | 4kW Micro Kits | 4kW SMA Kits
String vs Edge vs Micro?


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
  • Add-on options for battery storage, ground mounting, EV charging or permit plans

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4 kW Solar Kit Trina 345 XL SMA 4 kW Solar Kit Axitec 295M panels, SMA Sunny Boy, Rooftop 4.6 kW Solar Kit, Peimar 330P XL panels, SMA Sunny Boy, Rooftop 4kW PV Kit Canadian Solar CS6K-295-black SMA
4.1 kW Solar Kit Trina 345 XL, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $5,700.00
4.1 kW Solar Kit, Axitec 295M, SMA Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $5,700.00
4.6 kW Solar Kit, Peimar 330P XL, SMA Inverter
SHIPS 4 TO 6 WEEKS
Your Price: $5,700.00
4kW PV Kit Canadian 295 All-Black, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,000.00
4kW PV Kit Mission Solar MSE295SQ5T black SMA 4.3 kW Solar Kit, Peimar 310M panels, SMA Sunny Boy, Rooftop 4 kW Solar Kit Axitec 330P panels, SMA Sunny Boy, Rooftop 4kW PV Kit Canadian Solar CS1K-320MS SMA
4.1 kW PV Kit Misson 295 All-Black, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,000.00
4.3 kW Solar Kit, Peimar 310M, SMA Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $6,000.00
4.6 kW Solar Kit, Axitec 330P, SMA Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $6,000.00
4.1 kW PV Kit Canadian 320, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,100.00
4 kW Solar Kit iTek Energy 360 SMA 4kW Solar Kit Talesun 260P Fronius inverter 4kW PV Kit SolarWorld SW300 SMA Inverter 4 kW Solar Kit Silfab SLA310M SMA
4.3 kW PV Kit iTek 360 XL, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,100.00
4kW PV Kit SolarWorld 300 Mono, SMA inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,200.00
4 kW PV Kit Silfab 310 Black, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,300.00
4.1 kW Solar Kit Axitec 295 silver, Enphase 4kW PV Kit Trina 345 XL, SolarEdge Inverter-Optimizer 4kW Solar Kit, Peimar 330P XL panels, Enphase IQ7+ Micro 4kW PV Kit Canadian Solar CS1K-320MS Enphase
4.1 kW Kit Axitec 295 Silver, Enphase
SHIPS 1 to 2 WEEKS
Your Price: $6,800.00
4.1 kW Solar Kit Trina 345 XL, SolarEdge HD Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,100.00
4.6 kW Solar Kit, Peimar 330P XL, Enphase Inverter
SHIPS 4 TO 6 WEEKS
Your Price: $7,100.00
4 kW PV Kit Canadian 320, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,180.00
   
 

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 550 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.

4kW Battery Kits | 4kW Ground Mount


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