Solar Panels in Philadelphia, PA

Q: How many solar panels do I need in Philadelphia?

With 3.9 peak sun hours/day, a home using 6790 kWh/month needs about 182 panels (72.8 kW) with 400W panels.

Q: How much do solar panels cost in Philadelphia?

Average cost in Philadelphia is $2.95/watt. A 72.8 kW system costs ~$214,760 before 30% ITC, or ~$150,332 after.

Q: What is the solar payback period in Philadelphia?

At $0.162/kWh, solar pays back in about 11.2 years. 25-year net savings: ~$185,443.

Q: What solar incentives are available in Philadelphia?

Federal ITC + PA SRECs + Philadelphia Solar Rebate. Always verify with your installer and the DSIRE database.

Philadelphia gets 3.9 peak sun hours/day with electricity at $0.162/kWh. Calculate panels needed, cost after 30% ITC, and payback period.

Sun Hours

3.9/day

Rate

$0.162/kWh

Cost/Watt

$2.95

Net Metering

Yes

☀️ Philadelphia Solar Calculator

Monthly Usage6,790 kWh

Panels

182

System Size

72.8 kW

Annual kWh

82,905

Net Cost

$150,332

Savings/yr

$13,431

Payback

11.2 yrs

25-Yr Savings

$185,443

System Sizes in Philadelphia

Monthly kWh	Panels	kW	Net Cost	Savings/yr	Payback
500	14	5.6	$11,564	$1,033	11.2 yrs
750	21	8.4	$17,346	$1,550	11.2 yrs
1,000	27	10.8	$22,302	$1,992	11.2 yrs
1,500	41	16.4	$33,866	$3,026	11.2 yrs
2,000	54	21.6	$44,604	$3,985	11.2 yrs
2,500	67	26.8	$55,342	$4,944	11.2 yrs

Solar Guide for Philadelphia (2026)

Philadelphia at latitude 39.95°N receives 3.9 peak sun hours/day. At $0.162/kWh, solar offers solid long-term savings.

Incentives: Federal ITC + PA SRECs + Philadelphia Solar Rebate.

NEC Solar Requirements

All installations must comply with NEC Article 690: rapid shutdown (690.12), conductor sizing at 125% (690.8), and proper grounding per NEC 250. Use our Solar Wire Size Calculator for conductor sizing.

Disclaimer: Estimates only. Consult a licensed solar installer. NEC Article 690 compliance required.

Frequently Asked Questions

How many solar panels do I need in Philadelphia?

How much do solar panels cost in Philadelphia?

What is the solar payback period in Philadelphia?

What solar incentives are available in Philadelphia?

Related Calculators

Solar Panel Calculator

General solar sizing

Solar ROI Calculator

Calculate payback

Electricity Cost Calculator

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