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300 Watt Monocrystalline Solar Panel Kit with 1500W VertaMax Power Inverter
SKU: SOK-300WM-15

WindyNation takes the trouble and confusion out of adding a solar panel system to a battery bank with our 100% Complete Off-Grid Solar Kits!

  • 300 Watt Kit includes: (3) 100 Watt Monocrystalline Solar Panels, P30L LCD Charge Controller, 40 ft. UL Listed 12 AWG Solar Cable, 2 Pairs Branch Connectors, 3 Sets Solar Panel Mounting Hardware, and 1500 Watt VertaMax Power Inverter
  • Auxiliary power for RV’s and boats. Popular with commercial RV and marine retrofitters
  • Great for camping or remote cabins. Power devices in remote back country locations
  • Easy way to provide power for sheds, light poles and gates without the need for trenching and laying cables
  • Two or more panels can provide back-up power for critical appliances like a refrigerator during a power outage
  • Kit will produce an average of 300 Watt Hours (Wh) or 101 Amp Hours (Ah) of charge per day (depends on sunlight availability)

Kit Includes

(3 pc) 100 Watt WindyNation 12 volt Monocrystalline WindyNation Solar Panel

  • Three panels are perfect for 12 Volt battery bank charging
  • Windynation's 100 Watt Solar Panel combines high efficiency with long term reliability and stability
  • Outstanding electrical performance under high temperature and low irradiance conditions
  • See image in the photo gallery above for the technical specifications of the solar panel.
  • Note:Wiring diagrams for wiring the three solar panels in parallel (12V) is shown in the owners manual


(1 pc) 30 Amp P30L Solar Charge Controller

  • Prevents battery from being overcharged and damaged by the solar panel
  • User adjustable settings with LCD Display
  • Battery Temperature Sensor included
  • Overload, short circuit, and reverse polarity protected


(3 Set) Solar Panel Mounting Bracket and Fastener Set

  • Includes 12 anodized aluminum Z-brackets and 12 sets of stainless steel fasteners
  • Quickly and easily mount the solar panel to a RV, boat or roof
  • Corrosion resistant materials (anodized aluminum and stainless steel)


Solar Panel Cable and Solar Connectors

  • 40 continuous feet of UL Listed 12 AWG solar extension cable (E331483)
  • One Pair of Solar Connectors
  • The solar connectors allow for a quick and waterproof connection of the solar extension cable to the solar connectors attached to the back of the solar panel.

(Note: Solar Connectors do not come pre-attached to cable. Cut cable to length and attach Solar Connectors. The 12 AWG cable is used to connect the solar panels to the charge controller.)

Solar Branch Connectors

  • Two Pairs of Solar Branch Connectors
  • The solar branch connectors are used to wire the two solar panels in parallel for 12V battery charging
  • Wiring diagram for 12V is shown in the Owners manual


1500 Watt (3000 Watt Surge) VertaMax Power Inverter

Input Voltage (Nominal) 12VDC  Output Voltage (Nominal) 120VAC




Continuous Rated Power

1500 Watts


Peak Surge Power

3000 Watts


Input Voltage (Nominal)

12 – 13 VDC

Input Voltage (Min – Max)

11 – 15VDC

Output Voltage (Nominal)


Output Frequency (Nominal)

60 Hz

Output Waveform

Modified Sine Wave

Standby Current



Low Battery Voltage Alarm

10.5 VDC (+/-0.3VDC)

Low Battery Voltage Shutdown

10.0 VDC (+/-0.3VDC)

High Battery Voltage Shutdown

16 VDC (+/-0.5VDC)



Physical Specifications





Dimension (L x W x H)

13.0” x 8.7” x 3.0”

(330mm x 221mm x 76mm)


Unit Weight

8.2 lb. (3.7kg)



Auto Powered Fan

Operating Temperature

0oC to 60oC

Storage Temperature

-25oC to 70oC

Operating Humidity

20 to 80% relative humidity (non­condensing)

Thermal Protection


Inverter Safety Features


Low Voltage Shutdown Battery Protection

Automatic Overload Protection

Short Circuit Protection

High Temperature Protection

Load and Thermally Activated Cooling Fans

Fault Indication and Internally Fused


Inverter Battery Cables 

  • Use to connect the inverter to the 12 volt battery. Capable of carrying high current.
  • One red 2 gauge cable 3 feet in length + one black 2 gauge cable 3 feet in length with pre-attached cable lugs 



Additional Information

Power Consumption of Common AC Appliances

Appliance Watts
Stereo 200
Fan 200
Small Refrigerator 350
Light Bulb 100W 100
Microwave 1000W 1000
AC (5,000 BTU) 700
Computer 300
Hair Dryer 1000
Coffee Maker 1200
Blender 400