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Compare 4kW Solar Kits

Compare price and performance of the Top Brands to find the best 4 kW solar system with up to 30 year warranty. 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 parts list and options for battery storage, EV charging and installation.

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


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4.6 kW Solar Kit, Peimar 330P XL panels, SMA Sunny Boy, Rooftop 4.3 kW Solar Kit, Peimar 310M panels, SMA Sunny Boy, Rooftop 4 kW Solar Kit Axitec 295M panels, SMA Sunny Boy, Rooftop
4.6 kW Solar Kit, Peimar 330P XL, SMA Inverter
SOLD OUT; UPGRADE TO 340w
Your Price: $5,200.00
4.3 kW Solar Kit, Peimar 310M, SMA Inverter
SOLD OUT; UPGRADE TO 315w
Your Price: $5,457.00
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 4 kW Solar Kit Axitec 330P panels, SMA Sunny Boy, Rooftop 4kW PV Kit Canadian Solar CS1K-320MS SMA
4kW PV Kit Canadian 295 All-Black, 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 4.2 kW Solar Kit, Mission 300, SMA Inverter, Sunny Boy, MSE300 4 kW Solar Kit Silfab SLA310M SMA
4.3 kW PV Kit iTek 360 XL, SMA Inverter
SOLD OUT
Your Price: $6,100.00
4.2 kW Solar Kit, Mission 300, SMA Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $6,100.00
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 4.3 kW Solar Kit Peimar 310M, SolarEdge HD 4kW Solar Kit, Peimar 330P XL panels, SolarEdge inverter, Rooftop
4.1 kW Kit Axitec 295 Silver, Enphase
SHIPS 1 to 2 WEEKS
Your Price: $6,800.00
4.3 kW Solar Kit Peimar 310M, SolarEdge HD Optimizer
SOLD OUT; UPGRADE TO 315w
Your Price: $6,983.00
4.6 kW Solar Kit, Peimar 330P XL, SolarEdge Optimizer
SOLD OUT; UPGRADE TO 340w
Your Price: $7,000.00
4kW Solar Kit, Peimar 330P XL panels, Enphase IQ7+ Micro 4kW PV Kit Canadian Solar CS1K-320MS Enphase 4.3 kW Solar Kit Peimar 310M Enphase IQ7+ Micro
4.6 kW Solar Kit, Peimar 330P XL, Enphase Inverter
SOLD OUT; UPGRADE TO 340w
Your Price: $7,000.00
4 kW PV Kit Canadian 320, Enphase Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,180.00
4.3 kW Solar Kit Peimar 310M, Mono Black, Enphase IQ Micro
SOLD OUT; UPGRADE TO 315w
Your Price: $7,198.00
4kW PV Solar Kit Axitec 295 silver, SolarEdge 4kW PV Kit Canadian Solar CS6K-295-black Enphase 4.6 kW Solar Kit Axitec 330 silver, 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
4.6kW Solar Kit, Axitec 330P, Enphase Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,400.00
4 kW Solar Kit LG365 SMA Sunny Boy inverters 4kW PV Kit Canadian Solar CS6K-295-black SolarEdge 4kW PV Kit iTek 360 XL, SolarEdge Inverter-Optimizer
4 kW PV System, LG365 panels, SMA Inverter
SOLD OUT
Your Price: $7,500.00
4kW PV Kit Canadian 295 All-Black, SolarEdge Optimizer
SHIPS 1 to 2 WEEKS
Your Price: $7,500.00
4kW PV Kit Silfab 350 XL, SolarEdge Inverter-Optimizer 4kW PV Kit Canadian Solar CS1K-320MS SolarEdge 4.2kW Solar Kit Q.CELLS Q.PEAK QC325M Enphase IQ7+ Micro
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
4.2kW PV Kit Q.CELLS 325, Enphase Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,600.00
4 kW Solar Kit, Mission 300, Solar Edge, MSE300 4 kW Solar Kit Axitec 330P panels, SolarEdge HD, Rooftop 4.6 kW Solar Kit Solar Kit Panasonic 330, SMA Sunny Boy
4 kW Solar Kit, Mission 300, Solar Edge Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $7,600.00
4.6 kW Solar Kit, Axitec 330P, SolarEdge Inverter
SHIPS 1 TO 2 WEEKS
Your Price: $7,700.00
4.6kW Solar Kit Panasonic 330, SMA Inverter
SHIPS 1 to 2 WEEKS
Your Price: $7,700.00
4.2 kW Solar Kit Q.Cells 325M, SolarEdge HD 4 kW Solar Kit Silfab SLA310M Enphase MicroInverter 4.2 kW Solar Kit, Mission 300,  Enphase IQ7+ Micro Inverter, MSE300
4.2 kW Solar Kit Q.Cells 325M, SolarEdge HD Optimizer
SHIPS 1 TO 2 WEEKS
Your Price: $7,700.00
4 kW PV Kit Silfab 310 Black, Enphase IQ Micro
SHIPS 1 to 2 WEEKS
Your Price: $7,800.00
4.2 kW Solar Kit, Mission 300, Enphase IQ7+ Micro
SHIPS 1 TO 2 WEEKS
Your Price: $7,800.00
   
 

What you get with a 4kW Solar Kit

  • Up to 15 solar panels generate 500 kWh / mo (varies)
  • UL Certified with up to 30 year manufacturer warranty
  • Grid-tied inverters, optimizers or micro-inverters
  • Mount on rooftop or ground (optional); up to 300 sf
  • Flat-rate shipping with lift-gate service to continental U.S.
  • 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, permit plan or full-service installation

Featuring daily updates with the lowest prices on solar panels, FreeCleanSolar has a big selection of affordable 4 kW PV systems for sale. These 4kW 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 4kW Solar Kit requires up to 320 square feet of space. 4kW or 4 kilowatts is 4,000 watts of DC direct current power. This could produce an estimated 500 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 4kW PV systems can generate.

4kW Battery Kits | 4kW Ground Mount


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