Required Information

Placing a new order with Planet Plan Sets should only take a few minutes if you have the project information availble.  Here is a list of the important project information you should have reqady before placing your first order:

Person Placing Order

  • Name
  • Company
  • Phone
  • Email

Invoicing Contact

  • Name
  • Email

Contractor Information

  • Name
  • Company
  • Phone
  • Email

Homeowner Information

  • Project Address
  • Name
  • Building Department
  • Utility Company
  • Utility Bill (only needed for interconnection application processing)
  • Phone (only needed for interconnection application processing)
  • Email (only needed for interconnection application processing)

PV Product Specs

  • PV Module make/model
  • Inverter make/model
  • Rapid shutdown or optimizer make/model
  • Racking system make/model
  • Ground or Roof Mount

Roof Information (if you have multiple roof types, you can enter specs for each roof type)

  • Roof attachment make/model
  • Roof material (Asphalt shingle, concrete tile, metal panel, etc.)
  • Waterproofing method
  • Attachment pattern (48″ non-staggered, 72″ staggered, etc.)
  • Rafter or Truss Framing
  • Rafter/Truss Size (2×4. 2×6, 2×8, etc.)
  • Rafter/Truss Spacing (16″, 24″, etc.)
  • Rafter/Truss Orientation (attaching to hip trusses?)
  • Roof Slope


  • Overhead or underground electrical service entry
  • Backfeeding into End fed panel, center fed panel, or alternative backfeed option
  • Service panel info (make/model, busbar rating, main breaker size)
  • Subpanel – OPTIONAL (make/model, busbar rating, main breaker size)

Energy Storage

  • Battery system make/model
  • Description of battery system installation

System Layout

  • Contractor provided layout – SEE REQUIRED LAYOUT DIAGRAM INFO BELOW
  • OPTIONAL: PPS generated layout ($15 adder)

Photo Uploads (REQUIRED PHOTOS: roof, attic, service panel, subpanel, meter, and layout diagram)

  • Provide file sharing folder with key photos (Dropbox, Google Drive, etc.)
  • OR upload photos to order form

Can the existing Main Service Panel handle the PV output?

The NEC limits the maximum size of a PV backfed breaker in service panels using the 120% rule. Here are examples of how derated breakers can help increase PV backfeed capacity.

How to determine max backfeed capacity 
EXAMPLE: Assume 200 A bus bar with 200 A main breaker:

Step 1) Determine max bus bar capacity:
200 Amp rated bus bar x 120% = 240 Amps.

Step 2) Determine Max allowed PV inverter output: 

240 Amp – 200 Amp = 40A 1.25 = 32 Amp max inverter output
32 Amp x 240 V = 7.68 kW max AC inverter output

What if you need to backfeed more Amps than allowed by the NEC 120% rule? There are 3 common options:

Option A – Derate Main Breaker (Typically cost $200 – 800)
This is the most common and cost effective approach in areas that do not allow supply side connections (see below). Derating a main breaker requires that load calcs be performed to validate the derated main breaker will not experience nuisance tripping. This typically involves a licensed engineer or qualified person visit the home, record the current rating of all electrical appliances and devices used in and around the home. These current ratings are entered into a form and submitted to us for inclusion in the plan set. Contact us if you need the spreadsheet used to record the load calc values. In the example above, we have a 200 Amp bus bar and we install a derated 175 Amp main breaker, the MSP now can accept up to 12.48 kW of PV backfeed.
NOTE: Sometimes the desired backfeed breaker size may not be available for the MSP used, HOWEVER, iIt might be possible to upsize to the next larger breaker available. Example: If the max breaker size is 80A and you cannot find an 80 A breaker for the MSP, it MIGHT be acceptable to use a 100 A breaker. Contact us for more information.

Option B – Supply Side Connection (Typical cost $100 – 200)
When upgrading the service panel is difficult or cost prohibitive, you may be able to perform a “supply side connection” where the PV inverter output is “connected” into the supply side of the electrical service. This is a common method of interconnection in areas where the meter and Main Service Panel are in separate enclosures. However, in many areas (California, Arizona, Nevada) where the meter and main are in the same enclosure, this method may not be allowed by the Utility or AHJ. If your utility and AHJ are agreeable to a line side connection, please advise which device you will use to perform the line side connections. Examples inlude the Ilsco Kup-L-Tap, Polaris Connector, and Milbank Tap Connector.

Option C – Upgrade Main Service Panel (Typical cost $1500 – $3000+)
Many installers opt to install a new larger Main Service Panel. A popular option is installing one of the new generation of “Solar Ready Service Panels”. Siemens/Square D has several options in this category

Layout Diagram – Example 1
Satellite image with labels

Using a satellite image with labels applied for all major equipment works great

Layout Diagram Using Satellite ImageLayout Diagram Using Satellite Image

Layout Diagram – Example 2
Hand Drawn

Hand drawn diagrams work if all the equipment locations and labels are present and legible and array location is specified with sufficient information to allow us to draft the array in the proper location.

hand drawn layout & equipment location diagram1