How Many Solar Panels For (100, & 200 amp) Service

How Many Solar Panels For (100, & 200 amp) Service

100 amp or 200 amp service is the electrical panel installed by your electricity provider. These panels manage the electricity flow coming from the grid to run the household appliances safely.

So if you’re thinking about going off and curious about what size solar panel do you need for your 100 or 200 amp service, so stay with me I’m gonna share simple 2 steps to find out.

The size of the electrical panel will vary from 50-400 amp service but we’ll make the calculations for 100 amp & 200 amp which are the most common

In short, 100 amp service or electrical panel can handle 2400 watts or 2.4kWh solar power & 200 amp service breaker can handle 4.8 kWh or 4800 Watts of solar power

These numbers define the wattage capacity but the 2.4kWh solar panel system will not produce 2.4kWh power. Which I’m gonna share in a moment

Introduction to Amps, Volts, & watts

  • Amp (A): is defined as the number of electrons or current in simple words.
  • Volt (V): is defined as the speed or pressure of the current flow.
  • Watt (W) is the unit to measure the total power. (watts = Amps x Volts)

Watch: Volts, Amps, and Watts Explained

So we already know the value of amps, but how many voltages do electrical panels support? in most of the USA states the voltage coming from grid electricity will be 240 nominal volts because the electrical panel contains two 120V wires.

But our house outlets only support 120-120 volts (depends on your country and state’s electricity guide)

The solar panels are measured in watts and electrical panels or circuit boards are measured in amps so to make things more simple let’s convert the amp into watts

Volts x Amps = Watts

Solar wattage required for 100 amp service calculation

240 x 100 = 2400 watts

Solar wattage required for 200 amp service calculation

240 x 200 = 4800 watts

So now there’s are a few things to keep in mind before calculating the size of solar panels which can generate this much power

How to calaculate solar panel’s size for Amp service

Solar panels run at their 100% capacity under ideal sunlight conditions (Direct Sunlight, Right angel of the panels towards the sun) reference

So in short, you’ll not receive 100% from your solar panels all the time. On average you can expect 80% productions from your solar panels on a shiny day.

This number can vary depending on weather conditions, your geographical location, Season (summer or winter). So I live in Florida City and I receive 70-80% from my solar panels’ full capacity

So now simply add an extra 20% to values which we have calculated before (Solar wattage required)

How Many Solar Panels For 100 amp Service?

Amp service/electrical panel voltage = 240-Volts

Electrical panel Amps = 100 amps

240*100 = 2400 watts + 20% = 2880 Watts of solar panels

You’ can connect 3kW solar system with 100 amp service or 10 300-watt solar panels

How Many Solar Panels For 200 amp Service?

Amp service/electrical panel voltage = 240-Volts

Electrical panel Amps = 200 amps

240*200 = 4800 watts + 20% = 5760 Watts of solar panels

You can connect 6kW solar system with 200 amp service or 20 300 watts of solar panels

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I'm an experienced Sales Consultant with a demonstrated history of working in the renewables and environment industry. Skilled in Photography, Customer Service, and Sales.