System Expansion: Pennsylvania and Ohio
Completing a system expansion for my solar system located in PA or OH
How do I complete a system expansion for my solar system? (PA, OH)
If you have added panels or increased the size of your solar system, this is considered a system expansion. To continue generating and selling SRECs, your system must be updated and approved by the state and GATS.
*Please note that if the new panels feed into the same utility meter, it is a system expansion. In most cases, it does and it is very rare to add panels that feed a different utility meter*
What information does Sol Systems need?
To process a system expansion, Sol Systems will request updated system details and documentation based on your state.
In general, you may be asked to provide:
- Updated system size (capacity)
- A signed expansion agreement (DocuSign)
- Additional documents depending on your state
What documents are required?
Pennsylvania & Ohio
Customers must provide:
- Updated Permission to Operate (PTO) letter
- Photo of the expanded solar array
- Photo of the meter showing the original + expansion meter reading
Additional Ohio requirement:
- If the system expands above 6 kW, a dedicated revenue-grade meter is required
Please use the below template to copy and paste in an email to send us:
Solar Panel Make and Model:
Panel Quantity:
Power Rating:
Roof Tilt:
Roof Azimuth:
Inverter Type:
Inverter Quantity:
Online Date:
Do not forget to attach the required documents depending on your state. At the minimum, we will always need an interconnection agreement.
What happens after I submit my documents?
Once documentation is received:
- Sol Systems submits your expansion to the state program (PA AEPS or OH PUCO)
- Your system is updated in GATS, which tracks and mints certificates
- Approval is required before your system can generate certificates at the new capacity
When does my new system size take effect?
Your updated system capacity will only take effect after approval by:
- The state program, and
- GATS
Until then, your system may continue generating based on the previous registered size. If you notify us of your expansion 3 years later, those 3 years will be forfeited.
Metering requirements
- Systems must report generation using a dedicated meter or inverter data
- Updated metering must be provided if system size changes
How long does the process take?
System expansions may take several weeks to a few months, depending on:
- State review timelines
- GATS approval
- How quickly Sol Systems receives accurate information
What happens once my expansion is approved?
After approval:
- Your system will generate SRECs/RECs based on the new system size
- Sol Systems will notify you once the update is complete
- Payments will reflect the updated production going forward