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Pennsylvania · Philadelphia

Solar in Philadelphia in 2026

SLWritten by the Solar Learning Lab research desk·Updated August 21, 2026·12 min read

Philadelphia is a roof-by-roof city. A simple one or two family rowhouse can use the EZ solar permit route, but historic status, a small roof plane, and the 10 kW ceiling matter more here than a generic statewide payback chart.

PECO RS-2 and the May 31 period close

PECO's Rate R tariff has an $11.29 monthly distribution service charge and a 10.276 cent per kWh distribution energy charge. Supply charges are separate, so a tariff excerpt is not the same thing as a single all-in bill rate. The calculator uses the verified statewide EIA residential average as a conservative standardized input rather than pretending the distribution line alone is a complete PECO price. PECO Electric Tariff, effective April 2026 and EIA Table 5.6.A.

For a residential PECO customer-generator, RS-2 applies up to 50 kW. Generation is credited at full retail rate, excess carries forward at full retail value through the PJM planning period ending May 31, and remaining excess is compensated at full retail value. The monthly customer charge still stays on the bill. PECO also says one SREC is created per 1,000 kWh generated. For leased systems it identifies a 110% expected-annual-usage size limit, while that stated limit does not apply to customer-owned systems. Rate RS-2; PECO net-metering program page.

Philadelphia incentive claims need proof, timing, and an owner

The honest Philadelphia rebate answer is uncomfortable. The City program was established at 20 cents per watt for residential projects, but PEA says it became fully subscribed and placed applicants on a waiting list in June 2020, and funding was not renewed for FY21. PEA's current material does not publish a 2026 open or closed determination. Do not subtract it from a proposal as if it were guaranteed. Philadelphia Energy Authority rebate status.

PECO identifies SRECs as separate from net metering, one certificate per 1,000 kWh. They are not the same thing as a city cash rebate and should not be treated as fixed savings without a current market transaction. The residential 25D credit ended December 31, 2025. Lease or PPA providers may claim 48E, which is one reason their economics and the homeowner's ownership economics cannot be compared with a single headline discount. PECO SREC information; Congressional Research Service federal-credit summary.

Federal credit disclosure: residential 25D credit ended December 31, 2025; lease/PPA providers may claim 48E. Congressional Research Service.

A Philadelphia decision sequence that respects the roof

Start with the address, not the panel count. The first check is whether the property is a one or two family dwelling, whether the roof-mounted proposal remains at or below 10 kW, and whether the property appears on the Philadelphia Register of Historic Places. Those facts determine whether the electrical-only EZ path is even available. If the answer is no, ask for the General Building Permit path in writing. A proposal that says “permit included” without naming the path has skipped the hard part. Philadelphia permit path; EZ standard.

Second, measure usable roof, not the building footprint. Attached rowhomes can have a deceptively compact roof plane. A satellite sketch does not resolve fire access, parapets, chimneys, roof drains, hatches, shared-wall conditions, or afternoon shade. Those are field-design questions. It is reasonable to ask an installer for a layout showing the modules, setbacks, equipment, conduit route, structural assumptions, and the modeled production for that exact array. There is no prize for reaching a round system size if the usable roof does not support it.

Third, separate PECO bill reduction from the fixed customer charge. RS-2 can credit qualifying generation at full retail and carry excess to the May 31 period end, but the monthly customer charge remains payable. Ask whether the proposal assumes all generation is credited at the modeled rate, whether supply is default service or a competitive supplier, and what happens to annual excess. That is how a homeowner discovers whether an optimistic payback has quietly treated the entire bill as avoidable. PECO RS-2 language.

Finally, treat the city rebate as unavailable until a current written confirmation says otherwise. The historic rebate rules are not a current funding authorization, and the waiting-list history is a warning against math that only works with public money. SRECs, likewise, need their own ownership and registration discussion. A cash quote, loan quote, and PPA can all show the same roof, yet allocate incentives and long-term value very differently. PEA rebate history; PECO net-metering and SREC guidance.

A final Philadelphia check is the ownership route. Only 52.3% of city households are owner occupied in ACS 2023, and only 64.8% of the housing stock is single-family. That does not reduce the value of a suitable owner's roof. It does mean national lead forms routinely send people to a calculator who cannot authorize a rooftop project. Condo boards, landlords, and shared building roofs require a different permission conversation. The cleanest outcome is to establish ownership authority before someone spends time designing an array. ACS 2023 city data.

For an owner who can proceed, ask the contractor to identify whether the system has been modeled under PECO's standard supply assumptions, what happens at the annual May 31 period end, and who will register and retain SRECs. Then compare the roof layout with the permit scope. That small discipline catches a surprising amount of sales copy that has made assumptions about property status, roof capacity, and incentives that do not belong in the same sentence. PECO tariff; PECO customer-generator page.

Philadelphia proposal review ledger

Begin with the address record. Philadelphia's published solar route distinguishes a roof-mounted one or two family system that meets EZ conditions from work needing an electrical permit plus a General Building Permit. That distinction should be printed next to the system size, not buried in a contractor's assumption. The owner can ask, in writing, whether the design is under 10 kW, whether the property is on the Philadelphia Register, and which City filing is included in the price. A vague answer is a design risk, because the permit path changes the work scope. Philadelphia permit guidance; EZ standard.

Read the roof drawing as a document, not artwork. Philadelphia's attached-house stock is large enough that the City plan reports 401,050 one-unit attached structures among 679,880 cited units. A compact rectangle on an aerial image may hide hatch clearance, chimney shade, parapet shadows, vent stacks, drain locations, and access needs. The proposal should name the roof planes and show each module instead of treating the building footprint as solar area. This is also where the owner learns whether the modeled south-facing baseline resembles the actual rowhouse. Philadelphia housing context; PVGIS.

Separate construction allowances from the City schedule. The City describes a $25 one or two family filing fee, electrical-permit pricing tied to estimated electrical construction cost, a $200 building permit for solar panels and structure where needed, and listed surcharges. Accelerated review is listed at $1,050. No numerical solar review duration is published in the reviewed guidance. A contract can say who pays these amounts and who submits the application. It should not convert a published fee list into a fictional guaranteed permit date. L&I permit and fee information.

On the PECO worksheet, identify the fixed charge before celebrating bill elimination. The April 2026 tariff lists an $11.29 monthly distribution service charge on Rate R and a separate distribution energy charge. The supply portion of a bill is another variable. A careful financial model can show a statewide price benchmark for comparison while separately explaining why a PECO account will not necessarily reach zero dollars. That separation is more useful than arguing about one advertised savings percentage. PECO electric tariff; EIA price context.

Test the May 31 rule against the proposed annual production. RS-2 serves eligible residential customer-generators up to 50 kW, carries excess at full retail value through the PJM planning period, and compensates remaining excess at full retail value at the period close. Those mechanics are favorable but they are not proof that every extra module improves the owner's outcome. The homeowner still needs a current use profile, the installer's monthly output schedule, and a stated supply assumption. The question is not whether PECO credits solar. It is whether this system tracks this household. PECO RS-2.

Put SRECs in a separate column. PECO says a certificate represents 1,000 kWh of generation. A certificate is not the same asset as a retail bill credit or a City rebate. The document set should say whether the homeowner, lender, lease provider, or installer handles registration and retains the certificates. If a bid includes an SREC value, it should show the date and source of the assumption rather than pretending that a future market transaction is guaranteed revenue. PECO customer-generator information.

Handle the old Philadelphia rebate with restraint. PEA describes the residential rate as 20 cents per watt, notes that the program became fully subscribed, and documents a waiting list with no FY21 renewal. That history can explain why a homeowner has heard the program name. It cannot establish current availability for a new 2026 project. A useful review removes the rebate line and compares the roof project on cost, PECO treatment, production, and financing. If eligibility returns, written program confirmation can be added later. PEA rebate history.

Check ownership before requesting a final layout. ACS describes citywide owner occupancy at 52.3%, which is only context, but it reinforces a practical point: a renter, condominium owner, or owner with a shared roof cannot always authorize equipment alone. Title, association permissions, landlord consent, and roof-control documents precede an interconnection application. No state-average output figure settles that issue. A good intake process saves time by identifying who can grant roof access before engineering begins. ACS city context.

Use Solarize history correctly. Solarize Greater Philadelphia reports more than 4,100 signed contracts and over 23 MW of contracted capacity as of October 2025. It is evidence that experienced local market participants exist. It is not evidence that a particular roof meets EZ rules, that a particular bidder owns an SREC correctly, or that a waitlisted incentive will be paid. Market scale is helpful. Project facts still control. Solarize results.

Finish with the ownership choice. The federal residential 25D credit ended December 31, 2025, while a lease or PPA provider may claim 48E. That means an ownership comparison must look at total cash or financed dollars, term, escalation language, export-credit treatment, and REC ownership. A provider's tax position is not automatically the homeowner's tax benefit. The plainest Philadelphia proposal is usually the strongest: named roof, named permit route, named PECO assumption, named incentives, and no mystery money. CRS federal-credit summary.

Solar installers appearing in the Philadelphia local-results dataset

Ratings snapshot: Google Maps, August 2026, via the DataForSEO SERP feed. Zero companies paid us and none are endorsed by us.

Use ratings as one screening signal, not a substitute for reading the proposal, checking licensure, comparing equipment, and confirming who owns incentives and renewable-energy credits.

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