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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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4.6 kW Solar Kit, Peimar 330P XL panels, SMA Sunny Boy, Rooftop 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, SMA Inverter
SHIPS 4 TO 6 WEEKS
Your Price: $5,500.00
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
4kW PV Kit Canadian Solar CS6K-295-black SMA 4kW PV Kit Mission Solar MSE295SQ5T black SMA 4.3 kW Solar Kit, Peimar 310M panels, SMA Sunny Boy, Rooftop
4kW PV Kit Canadian 295 All-Black, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,000.00
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 kW Solar Kit Axitec 330P panels, SMA Sunny Boy, Rooftop 4kW PV Kit Canadian Solar CS1K-320MS SMA 4 kW Solar Kit iTek Energy 360 SMA
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
4.3 kW PV Kit iTek 360 XL, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $6,100.00
4kW PV Kit SolarWorld SW300 SMA Inverter 4 kW Solar Kit Silfab SLA310M SMA 4.1 kW Solar Kit Axitec 295 silver, Enphase
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 Kit Axitec 295 Silver, Enphase
SHIPS 1 to 2 WEEKS
Your Price: $6,800.00
4kW Solar Kit, Peimar 330P XL panels, Enphase IQ7+ Micro 4kW PV Kit Trina 345 XL, SolarEdge Inverter-Optimizer 4kW PV Kit Canadian Solar CS1K-320MS Enphase
4.6 kW Solar Kit, Peimar 330P XL, Enphase Inverter
SHIPS 4 TO 6 WEEKS
Your Price: $6,900.00
4.1 kW Solar Kit Trina 345 XL, SolarEdge HD Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,100.00
4 kW PV Kit Canadian 320, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,180.00
4kW Solar Kit ECO280T Apollo Black SolarEdge inverters-optimizers 4.3 kW Solar Kit Peimar 310M Enphase IQ7+ Micro 4kW Solar Kit, Peimar 330P XL panels, SolarEdge inverter, Rooftop
4.2kW PV System, ECO280T Black panels, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,200.00
4.3 kW Solar Kit Peimar 310M, Mono Black, Enphase IQ Micro
SHIPS 1 TO 2 WEEKS
Your Price: $7,200.00
4.6 kW Solar Kit, Peimar 330P XL, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,200.00
4kW PV Solar Kit Axitec 295 silver, SolarEdge 4kW PV Kit Canadian Solar CS6K-295-black Enphase 4kW PV Kit Mission Solar MSE295SQ5T-black Enphase
4.1 kW PV Kit Axitec 295 Silver, SolarEdge Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,300.00
4 kW PV Kit Canadian 295 All-Black, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,400.00
4.1 kW PV Kit Mission 295 All-Black, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,400.00
4.6 kW Solar Kit Axitec 330 silver, Enphase 4 kW Solar Kit Silfab SLA310M Enphase MicroInverter 4 kW Solar Kit LG365 SMA Sunny Boy inverters
4.6kW Solar Kit, Axitec 330P, Enphase Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,400.00
4 kW PV Kit Silfab 310 Black, Enphase IQ Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,500.00
4 kW PV System, LG365 panels, SMA Inverter
Limited Availability
Your Price: $7,500.00
4kW PV Kit Canadian Solar CS6K-295-black SolarEdge 4kW PV Kit iTek 360 XL, SolarEdge Inverter-Optimizer 4kW PV Kit Mission Solar MSE295SQ5T SolarEdge
4kW PV Kit Canadian 295 All-Black, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,500.00
4.3 kW Solar Kit iTek 360 XL, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,500.00
4.1 kW PV Kit Mission 295 All-Black, SolarEdge Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,500.00
4.3 kW Solar Kit Peimar 310M, SolarEdge HD 4kW PV Kit Silfab 350 XL, SolarEdge Inverter-Optimizer 4kW PV Kit Canadian Solar CS1K-320MS SolarEdge
4.3 kW Solar Kit Peimar 310M, SolarEdge HD Optimizer
SHIPS 1 TO 2 WEEKS
Your Price: $7,500.00
4.2 kW Solar Kit Silfab 350 XL, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,600.00
4.1 kW PV Kit Canadian 320, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,600.00
4kW PV Kit SolarWorld SW300 Enphase MicroInverter 4kW PV Kit SolarWorld SW300 SolarEdge Optimizer 4 kW Solar Kit Axitec 330P panels, SolarEdge HD, Rooftop
4.2kW PV Kit SolarWorld 300 Mono, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,700.00
4kW PV Kit SolarWorld 300 Mono, SolarEdge HD Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,700.00
4.6 kW Solar Kit, Axitec 330P, SolarEdge Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $7,700.00
4 kW Solar Kit Silfab SLA310M SolarEdge 4 kW Solar Kit LG330 ACe Enphase Micro Inverter 4kW PV Kit Solaria 350, SolarEdge Inverter-Optimizer
4 kW PV Kit Silfab 310 Black, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,800.00
4 kW Solar Kit LG 330 AC Enphase IQ Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,800.00
4.2 kW PV Kit Solaria 350, SolarEdge HD Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $8,800.00
4.6 kW Solar Kit Solar Kit Panasonic 330, SolarEdge inverter optimizer, rooftop mount 4.2 kW Solar Kit LG350 SolarEdge HD inverters-optimizers
4.6kW Solar Kit Panasonic 330, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $9,000.00
4.2 kW PV System, LG350 panels, SolarEdge HD Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $9,000.00
   
 

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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