Solar Energy Calculator for 'Grid Tied'
Compare effects of retail -vs- wholesale crediting
Also called Net Metering, is the most practical way to utilize residential Solar power. A battery is nonessential but may be added to cover grid power failure during a no Sunshine period.  Extra Solar power is sent TO the grid, and when no Sunshine, you get FROM that grid the power you need. Power may travel and is metered in either direction, and usually at end of year, you are credited by their kWhr credit rate for any extra power.

This comparison has two kWhr rates, the amount of both depend upon your utility provider;
1) utility electric bill kWhr rate, and
2) Solar credit kWhr rate
Solar Utility Credit is less per kWhr than your monthly bill kWhr.  Both rates are required for calculating Solar payback period and its ROI.

Crediting Solar with ’Retail’ is in debate today.  Retail includes supplier expenses, taxes, shipping, and misc. fees beyond Solar.  Additionally, those retail line items will require the Solar energy supplier to eventually report such credit as 'business' income, e.g. services, taxes and fees, etc.

See Grid Tied diagram.

Click to Exit
Click for:       'Grid-Tied' Overview
Grid Tied diagram    Net Metering 101    Straight Talk    Solar Zone Map
 8 key factors that guide your system  (Enter with Tab key, Enter key, or Touch)
Current billing Monthly: kWhr  @  $/kWhr =  $/Month
Hrs of Daily Sun in  × W panels.  Utility Credit @ $/kWhr
Panel Life Years   Net Metering App. fee $    Fed. Tax Credit: –%
Add in one-time costs here and discounts here  
  Select a system  
Without Battery 
With Battery 
System Cost: $         $ Profit after year payback
Simple ROI =            Annual ROI =
 Enter up to 5 systems for comparison  

   Cookie Jar   


Visit Evergreen Solar ... National Council for Solar Growth
See Wholesale Solar Grid-Tied pricing
See renvu Grid-Tied Inverters & more pricing

 |   © 2012-2017  Patrick Mullins   |

Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6