Home solar panel system demonstrating the value of solar panels in the USA

Yes, solar panels are worth it for most homeowners paying above $130 per month in electricity, provided they own their roof, plan to stay at least 7 years, and live in a state with active net metering. For homeowners below that bill threshold, in states with weak incentive programs, or on north-facing or heavily shaded roofs, the financial case weakens considerably.

So, are solar panels worth it? The honest answer is: it depends on four numbers your sales rep rarely puts in front of you at the same time. Your current electricity rate, your roof’s sun exposure, the net system cost after the federal 30% Investment Tax Credit, and your utility’s actual net metering credit rate. 

Every solar savings projection lives or dies on those four inputs. Get them right, and the math often works. Accept the installer’s estimate without verifying them, and you may spend a decade waiting for a payback period that never quite arrives.

The national average residential electricity rate crossed 16.2 cents per kWh in 2026, according to the U.S. Energy Information Administration, but that average masks enormous variation. Homeowners in Hawaii, California, Massachusetts, and Connecticut pay 28 to 45 cents per kWh and routinely see payback periods under 7 years.

 Homeowners in Louisiana, Idaho, and Oklahoma pay 9 to 12 cents per kWh and may wait 14 years or more. Your state’s rate is not a footnote; it’s the foundation of every calculation in this article.

What Determines Whether Solar Panels Are Worth It

Whether solar panels are worth it comes down to a small set of variables that interact in ways most installers don’t walk you through in a sales presentation. Understanding each one separately, before you combine them, gives you real control over your own financial analysis.

The interaction between your utility’s net metering credit rate and your actual consumption pattern. If you’re at work all day and consuming most of your power in the evenings, your system is exporting cheap daytime power back to the grid, and you’re buying expensive peak-hour power back, at a credit rate that may be lower than your retail rate. That gap directly reduces your effective savings.

Your Current Electricity Rate and Usage

Your electricity rate is the single most powerful factor in determining whether solar panels are worth it. At 25 cents per kWh, a 9 kW system producing 12,000 kWh annually offsets $3,000 in electricity costs per year. At 11 cents per kWh, that same system offsets only $1,320, less than half, while the installation cost is identical.

Decision checkpoint: Pull your last 12 months of utility bills and calculate your average monthly spend. If that number is consistently below $100, the financial case for solar in most U.S. states becomes difficult to justify within a standard 25-year system lifespan.

Your usage pattern matters alongside your rate. A household consuming 1,200 kWh per month has more to offset and gains more from solar than one using 600 kWh, even if both pay the same rate per kWh.

Roof Condition, Orientation, and Shading

A south-facing roof at a 15 to 40-degree pitch in a high-sun-hour state is close to ideal. East- and west-facing roofs typically produce 15 to 20% less energy than an equivalent south-facing system. North-facing panels in most U.S. locations produce so little that the economics rarely close.

Shading is the variable most homeowners underestimate. A single large tree shading your roof for four hours per day can reduce system output by 20 to 35%, depending on how your inverter handles partial shading. 

Before any installer quotes you a system, a professional shading analysis, not just a visual inspection, should confirm your roof’s actual production potential.

Roof age also matters. If your roof is more than 15 years old, installing solar panels on an aging roof creates a specific financial risk: you may need to remove and reinstall your panels mid-system-life for $2,000 to $5,000, which should be factored into your payback calculation upfront.

Available Incentives and Rebates in Your Area

The federal Investment Tax Credit (ITC) currently allows homeowners to deduct 30% of their total solar system cost from their federal income taxes, not as a deduction but as a direct credit. On a $28,000 system, that’s $8,400 back in taxes owed, reducing your net cost to $19,600.

Beyond the federal credit, state-level incentives vary dramatically. Massachusetts offers the Solar Massachusetts Renewable Target (SMART) program, which pays a fixed per-kWh adder for 10 years. 

New York’s NY-Sun initiative provides upfront rebates through the Consolidated Edison and National Grid service territories. Florida, by contrast, has no statewide solar rebate program; it relies almost entirely on the federal ITC and a property tax exemption.

Many homeowners also qualify for Solar Renewable Energy Certificates (SRECs) in states like New Jersey, Pennsylvania, and Maryland, where solar production earns tradeable certificates worth $40 to $300 each depending on the market. 

This is a revenue stream most installers mention only briefly, but in New Jersey, SREC income has historically shortened payback periods by 2 to 3 years.

How Long You Plan to Stay in Your Home

The standard residential solar payback period in 2026 runs 7 to 12 years for most U.S. homeowners in moderate-to-high-rate states. If you’re planning to move within 5 years, the math rarely works in your favor with a cash purchase.

That said, an owned (not leased) solar system does increase home resale value. Lawrence Berkeley National Laboratory research has consistently documented a $4 per watt premium on homes with owned solar systems, meaning a 9 kW system could add roughly $36,000 to your home’s market value, though actual results vary by local market, buyer financing, and home price tier. 

To understand how this plays out in real transactions, the detailed breakdown on how solar affects home sale timelines and pricing covers what the research actually shows versus what installers claim.

Are Solar Panels Worth It in Your State?

Are Solar Panels Worth It in the USA for modern homes with rooftop solar panels
Rooftop solar panels installed on a modern home

Are solar panels worth it in your state is a question that produces genuinely different answers depending on where you live, not just marginally different, but sometimes the difference between a 6-year payback and a 15-year one.

Field observation: What I’ve consistently noticed when reviewing state-level solar economics is that homeowners in high-rate states like Connecticut and Massachusetts dramatically underestimate their financial case, while homeowners in low-rate states like Louisiana often overestimate it based on national advertising.

Why Location and Local Electricity Rates Matter

Two states with similar sun exposure can produce radically different solar economics based on electricity rates alone. Georgia and South Carolina receive nearly identical peak sun hours, roughly 4.7 to 5.0 per day, but Georgia Power customers pay significantly different rates than Duke Energy Progress customers in the Carolinas. The sun doesn’t determine your payback period. Your utility bill does.

Net metering policy adds a second layer of state-specific variation. Some states mandate that utilities credit solar exports at the full retail rate. Others allow utilities to set their own lower buyback rates. 

And some states, most notably Nevada after its 2015 net metering revision and California after NEM 3.0 took effect in 2023, have moved to time-of-use export pricing that pays far less for daytime solar exports than the retail rate homeowners pay for evening consumption.

California’s NEM 3.0 policy is the clearest example of how a policy change can fundamentally alter solar economics mid-market. Homeowners who installed solar before April 2023 receive NEM 2.0 credits for 20 years. 

New installations receive NEM 3.0 credits that average about 75% lower for daytime exports, shifting the value proposition heavily toward battery storage rather than grid export.

State-by-State Payback Period Differences

Projections vs. Reality: Payback Period by State (2026)

StateAvg. Electricity Rate (¢/kWh)Net Metering PolicyTypical Payback PeriodSolarInfoPath Reality Check
Massachusetts28–32¢Full retail credit6–8 yearsSMART program adds $0.03–$0.10/kWh adder
California29–38¢NEM 3.0 (reduced export)8–11 years (w/battery)Without battery, payback extends 2–3 years under NEM 3.0
New York22–26¢Full retail credit7–9 yearsNY-Sun rebates reduce net cost $0.20–$0.40/W
Texas12–16¢No statewide mandate10–13 yearsNo state income tax credit; strong sun partially compensates
Florida13–15¢Full retail credit11–14 yearsNo state rebate; property tax exemption helps
Louisiana9–11¢Limited / varies by utility14–17 yearsEntergy LA and Cleco have restrictive net metering tariffs
New Jersey17–20¢Full retail credit + SRECs6–9 yearsSREC market historically $100–$200/certificate in 2025–26
Arizona13–15¢Reduced export rate11–14 yearsAPS E-26 tariff reduced net metering value significantly

States With the Best Net Metering and Incentive Policies

Massachusetts, New Jersey, Minnesota, and Maryland currently offer the strongest combination of rate-based savings, net metering value, and state incentive programs. Each state has a different mechanism: Massachusetts uses a production incentive, New Jersey uses the SREC market, Minnesota has a Value of Solar tariff in some territories, and Maryland offers a state income tax credit of up to $1,000 alongside a SREC program.

Rhode Island’s Renewable Energy Growth (REG) program is one of the least-discussed strong-incentive programs in the country. 

Qualifying residential solar installations receive a fixed 15-year contract for their solar production, providing predictable income that makes payback calculations unusually reliable, a feature almost no installer mentions to Rhode Island homeowners unprompted.

How to Check Solar Viability for Your Specific State

The most accurate way to assess your state’s specific solar economics is through the Database of State Incentives for Renewables & Efficiency (DSIRE), which maintains real-time records of every active solar incentive program at the state and utility level. 

Your utility’s current net metering tariff, the document that governs exactly how your exports are credited, is a public filing available through your state’s Public Utilities Commission. Both documents take under 10 minutes to find and will tell you more than any sales presentation.

How Much Do Solar Panels Cost?

The average residential solar installation in the U.S. costs $2.80 to $3.50 per watt before incentives in 2026, according to tracking data from Lawrence Berkeley National Laboratory’s Tracking the Sun program. A typical 9 kW residential system therefore runs $25,200 to $31,500 before the federal ITC.

The number installers quote you is not the number that determines your payback period. The number that matters is the net cost after all applicable incentives, federal credit, state rebate, and any utility incentives, because that’s the actual cash outlay your payback clock starts from.

Average Cost Per Watt and System Size

System size in residential solar is driven by your annual kWh consumption, not your roof size. A home consuming 14,400 kWh per year needs roughly a 9 to 10 kW system to achieve near-full offset in a state with 5 peak sun hours per day. In a cloudier state like Washington or Oregon, where annual peak sun hours average 3.5 to 4.0 per day, you’d need 11 to 12 kW to produce the same annual output.

Cost per watt has declined significantly over the past decade, but that decline has slowed considerably. From 2020 to 2026, average installed cost per watt dropped from approximately $3.05 to $2.90, a much smaller decline than the industry experienced in the previous decade. Don’t plan your budget around further dramatic cost reductions.

Factors That Increase or Decrease Installation Cost

Several variables move your cost per watt outside the national average range:

  • Roof complexity: steep pitches, multiple planes, or dormers add $0.15 to $0.30 per watt in labor
  • Electrical panel upgrade: if your existing panel is 100 amps or older, many AHJs require an upgrade to 200 amps, adding $1,500 to $3,500 to your total project cost
  • Battery storage: adding a single 13.5 kWh battery adds approximately $9,000 to $13,000 to the project before incentives
  • Ground-mount vs. rooftop: ground-mount systems cost $0.30 to $0.60 more per watt due to trenching, foundation work, and longer conduit runs
  • Rural location: installer travel costs and fewer competitive bids in rural markets typically add 8 to 15% to final quotes

Financing Options: Cash, Loan, Lease, and PPA Compared

Projections vs. Reality: Solar Financing Comparison (2026)

Financing TypeUpfront CostWho Owns SystemQualifies for ITCImpact on Home SaleLifetime Savings
Cash purchaseFull system costYouYesIncreases valueHighest
Solar loan (6–9% APR)$0 downYouYesIncreases valueModerate (interest reduces net savings)
Solar lease (20-yr)$0 downInstallerNoComplicates saleLowest
Power Purchase Agreement$0 downThird partyNoComplicates saleLow to moderate

The lease and PPA structures eliminate your upfront cost, but they also eliminate your eligibility for the 30% federal ITC, your SREC income in applicable states, and your home value premium. 

The company that owns your panels claims all three benefits. This is the tradeoff most homeowners don’t fully grasp until they try to refinance or sell their home and discover the complexity a solar lease creates for property transactions.

How Long Does It Take Solar Panels to Pay for Themselves?

Are Solar Panels Worth It in the USA for residential solar panel installations
Residential solar panels producing clean energy

The residential solar payback period in 2026 averages 7 to 12 years across U.S. markets, but that range is wide enough to be nearly useless without state-specific inputs. Here’s how to calculate yours with real numbers.

The Solar Payback Period Formula

The calculation is straightforward once you have the right inputs:

Net System Cost ÷ Annual Electricity Savings = Payback Period (Years)

  • Net system cost = Total installation cost minus federal ITC (30%) minus any state rebates
  • Annual electricity savings = System’s estimated annual kWh production × your utility’s retail rate per kWh (adjusted for your net metering credit rate)

The variable most homeowners get wrong is the annual savings figure. Multiplying your system’s production by your retail rate only gives you the right number if your utility credits you at the full retail rate. 

If your utility credits exports at a lower rate, as APS does in Arizona under its E-26 tariff or as California utilities do under NEM 3.0, your effective savings are lower than that formula suggests.

Sample Payback Calculations by Electricity Rate

Scenario 1 — Strong economics (Massachusetts): A homeowner in Worcester paying Eversource approximately $210 per month installs a 10 kW system at $31,000. After the 30% federal ITC ($9,300) and a SMART program adder estimated at $0.06/kWh for 10 years, the net effective cost drops to approximately $21,700. 

The system produces roughly 12,500 kWh annually, offsetting $3,500 to $3,750 at Eversource’s current blended rate. Estimated payback: 6 to 7 years, with 18 to 19 years of net savings remaining on a 25-year panel warranty.

Scenario 2 — Weak economics (Louisiana): A homeowner in Shreveport paying Cleco approximately $145 per month installs a 9 kW system at $27,000. After the 30% ITC ($8,100), the net cost is $18,900. Louisiana has no state solar rebate. 

Cleco’s net metering policy credits exports at the avoided cost rate, significantly below retail, reducing effective annual savings to approximately $1,200 to $1,400. Estimated payback: 13 to 15 years, leaving only 10 to 12 years of net savings within the standard warranty period.

That second scenario isn’t a failure of solar as a technology. It’s a consequence of a low electricity rate combined with a utility whose net metering policy returns less than the retail rate. The sun is just as strong in Louisiana as in Mississippi, but the economics look very different.

Pros of Installing Solar Panels

Lower or Eliminated Electric Bills

For homeowners in high-rate states, a properly sized solar system can reduce your monthly electricity bill to near zero for 8 to 10 months of the year, with partial offsets during winter months when production drops.

In Massachusetts and New York, homeowners with south-facing roofs and annual consumption under 14,000 kWh regularly report annual bill reductions of 85 to 95% after going solar.

Protection Against Rising Utility Rates

This is the financial argument that holds up over time even when initial savings are modest. Electricity rates in the U.S. have increased at an average of 2.5 to 3.0% annually over the past two decades. 

A solar system locks in a significant portion of your energy cost at today’s effective rate, meaning every year rates increase, your actual savings from solar grow without any change to your system.

A homeowner in Phoenix paying APS 14 cents per kWh today may be paying 19 to 22 cents per kWh by 2036 if historical rate trends continue. The solar panels produce the same kilowatt-hours either way. That rate escalation is free additional savings.

Increased Home Value

Owned solar systems increase home resale value in most U.S. markets. The premium is most consistent in high-rate states where buyers understand the financial value of the offset. 

In lower-rate markets, the premium is smaller and less predictable. Understanding what a solar warranty covers and transfers to future owners is worth reviewing before relying on this value argument, because a warranty that doesn’t transfer cleanly reduces the home value benefit considerably.

Reduced Carbon Footprint

A 9 kW residential solar system in a moderate-sun-hour state produces roughly 11,000 to 13,000 kWh annually, offsetting approximately 7 to 9 metric tons of CO₂ per year based on the EPA’s average U.S. grid emissions factor of 0.386 kg CO₂ per kWh in 2025. Over 25 years, that’s a meaningful reduction, equivalent to planting roughly 4,000 trees.

The carbon benefit is real. Whether it matters to your financial calculation depends on your priorities, not your payback period.

Low Ongoing Maintenance

Residential solar panels require minimal maintenance under normal operating conditions. Rain clears most surface dust on typical roof pitches. Inverters are the most common component failure and typically carry 10 to 25-year warranties depending on the model. 

The racking system rarely requires attention. Annual cleaning in dry, dusty climates, such as Arizona, New Mexico, and parts of California, can recover 3 to 7% of lost production and costs $150 to $300 for a professional service.

Cons and Situations Where Solar Panels Aren’t Worth It

High Upfront Costs

Even with the 30% federal ITC, a residential solar installation represents a $19,000 to $22,000 net investment for most homeowners. That’s a significant capital commitment, and if you’re financing it with a solar loan at 7 to 9% APR, the interest charges add $8,000 to $15,000 to your total cost over the loan term, meaningfully extending the effective payback period.

The payback period math your installer shows you typically assumes a cash purchase. Ask specifically what the payback period looks like with your actual financing terms. The answer is almost always longer.

Unsuitable Roofs or Excessive Shade

An older roof, a north-facing primary roof plane, or significant shading from mature trees can make a solar installation financially impractical even in a high-rate state. Replacing a roof before installing solar adds $8,000 to $18,000 to the effective project cost, a cost that doesn’t qualify for the federal ITC. 

A heavily shaded roof in Massachusetts isn’t a better solar candidate than a shade-free roof in Louisiana just because the electricity rate is higher.

Already-Low Electricity Bills

If your average monthly electricity bill is under $80 to $100, the annual savings from solar in most states won’t justify the net system cost within a reasonable timeframe. This is the scenario no installer brings up unprompted, because the answer is often “solar isn’t worth it for your specific situation right now.”

Decision checkpoint: If your bill is below $100 monthly and your state’s electricity rate is below 14 cents per kWh, run the payback calculation before getting excited about a sales quote. The numbers may not close.

Moving or Selling Soon

A cash-purchased solar system takes 7 to 12 years to pay back in most markets. If you sell before that, you’re effectively transferring the remaining savings to the buyer. You may recover some value through the home sale premium, but that premium is uncertain, buyer-financing dependent, and varies by local market.

A solar lease creates a more serious complication. Buyers must either assume your lease contract, committing to years of remaining payments to a third-party company — or you must buy out the lease at close, which can cost $10,000 to $25,000 depending on the remaining contract length.

Lack of Local Incentives or Net Metering

States without meaningful net metering protections or state-level incentives can make solar a poor financial decision even with strong sun. The economics of utility-scale versus residential solar are worth understanding here, because in some states, subscribing to a community solar program delivers better economics than rooftop ownership for homeowners with weak local net metering.

How to Calculate Your Personal Solar Payback Period

Here’s a step-by-step calculation framework using real inputs, not estimates:

Step 1 — Find your annual kWh consumption. Add up 12 months of utility bills. Look for the kWh figure, not the dollar amount.

Step 2 — Determine your system size. Divide your annual kWh consumption by your state’s average annual peak sun hours × 365. Example: 14,400 kWh ÷ (5.0 hours × 365 days) = 7.9 kW system needed.

Step 3 — Calculate gross installation cost. Multiply your system size in watts by your installer’s quoted cost per watt. A 9,000W system at $3.10/W = $27,900.

Step 4 — Apply the federal ITC. Multiply gross cost by 0.30. Subtract from the gross cost. $27,900 × 0.30 = $8,370. Net cost = $19,530. Add any state rebates if applicable.

Step 5 — Calculate annual savings. Multiply your system’s estimated annual production (from Step 2 sizing) by your utility’s retail rate — or your net metering credit rate if different. 11,000 kWh × $0.25 = $2,750/year.

Step 6 — Divide net cost by annual savings. $19,530 ÷ $2,750 = 7.1 years payback.

That 7.1-year payback assumes your installer’s production estimate is accurate, your utility rate doesn’t change, and your system degrades at the standard 0.5% per year. Real payback periods typically run 5 to 10% longer than calculated estimates due to production shortfalls, billing structure details, and minor degradation effects.

Solar Incentives and Rebates by State

The most complete and current source for state-by-state solar incentive data is the DSIRE database maintained by N.C. Clean Energy Technology Center, which tracks every active incentive program at the state, utility, and local level. Below is a summary of the most impactful 2026 programs by region:

Northeast: Massachusetts SMART program, New York NY-Sun incentives, New Jersey SREC II program, Rhode Island REG program, Connecticut ZREC program.

Mid-Atlantic: Maryland Residential Clean Energy Grant Program ($1,000 grant + SREC market), DC SREC market (historically highest SREC prices in the U.S. at $400+ per certificate), Virginia no state rebate but full retail net metering.

Southeast: Florida no state rebate, full retail net metering, property and sales tax exemptions. Georgia: no state rebate, Georgia Power net metering program with 30-year interconnection agreements.

Southwest: Arizona Property Tax Exemption on system value; APS and SRP have different net metering structures with varying export credit rates. New Mexico Sustainable Building Tax Credit (residential solar component).

West: California SGIP battery incentive (up to $200/kWh for storage), Nevada no state rebate, NV Energy net metering with export credits below retail rate.

One detail most homeowners never investigate: utility-specific incentive programs that exist outside state-level programs. Pacific Gas & Electric’s CARE program, for example, provides low-income customers significantly higher export credits under NEM 3.0 than standard-rate customers receive. 

These utility-specific structures can change the economics materially and are worth a direct call to your utility’s solar department before signing any contract.

Is Solar Worth It for You?

Are solar panels worth it depends less on solar technology and more on four specific, verifiable numbers unique to your situation: your electricity rate, your roof’s production potential, your net-of-incentives system cost, and your utility’s actual export credit rate.

For homeowners in Massachusetts, New Jersey, New York, Rhode Island, and similar high-rate, strong-incentive states, solar is frequently a sound financial decision with payback periods under 9 years and substantial remaining savings. 

For homeowners in Louisiana, Idaho, Oklahoma, and other low-rate states with limited net metering, the same system installed on the same roof produces a financial case that may not justify the commitment.

The solar industry has a long history of projecting best-case outcomes in sales presentations. The utility rate escalation assumptions are often aggressive. The production estimates often reflect ideal conditions. The net metering credit rate used in the calculation is sometimes the retail rate even when the actual credit will be lower.

Your job as a careful homeowner is to separate the projection from the reality, using your own utility bills, your state’s actual incentive data, and the step-by-step calculation framework in this article. That process takes a few hours. It protects a decision worth $20,000 to $30,000.

If you’re evaluating whether a larger solar investment beyond your own roof makes sense, the full breakdown of how utility-scale solar projects are structured and what they cost provides useful context for understanding the economics at different scales.

Frequently Asked Questions

Is solar worth it if I have a small roof?

A small roof limits your system size, which limits your production and savings. If your roof can only accommodate a 4 kW system but your household uses 1,200 kWh per month, solar will partially, not fully, offset your bill. 

In a high-rate state, a partial offset still produces meaningful savings. In a low-rate state, a small system may not recover its installation cost within the warranty period. Run the calculation with your actual roof capacity before proceeding.

Is solar worth it without net metering?

Without net metering, you can only benefit from solar power you consume directly; electricity you produce but don’t use in real time is exported to the grid with no credit or minimal credit. In states without net metering protections, battery storage becomes essential to capturing your full system value. Battery-plus-solar systems cost $35,000 to $50,000 before incentives, materially changing the payback math in any state.

Does solar increase home value in every state?

No. The home value premium from solar is most consistent and largest in high-rate states like Massachusetts, California, and New York, where buyers actively value the electricity cost savings. In low-rate states like Louisiana and Idaho, buyer awareness of solar value is lower, financing complications are more common, and the premium is smaller and less predictable. Don’t assume the Lawrence Berkeley $4/watt premium applies uniformly to your local market.

How do I know if solar panels are worth it in my state specifically?

Pull your last 12 months of utility bills to confirm your average monthly spend and consumption in kWh. Look up your state’s current net metering policy through your state PUC’s website or DSIRE. Get at least three installation quotes from licensed local installers. Run the six-step payback calculation above using your actual numbers, not the installer’s savings estimate. If the payback period exceeds 12 years, the financial case needs more scrutiny.

This article by SolarInfoPath (2026 research framework) is part of a comprehensive solar knowledge architecture covering all major high-value sectors including legal disputes (installation negligence, contracts, liability, fraud, lawsuits, liens, HOA and permitting disputes), financial structures (loans, PPA/lease agreements, DSCR financing, tax equity, investment and project finance), tax law (ITC, Section 48/25D, MACRS depreciation, bonus credits, IRS audits, recapture rules, domestic content and IRA/OBBBA compliance), insurance and risk (property damage, hail/wind/fire claims, bad faith insurance disputes, warranty coverage), policy and regulation (net metering, FERC interconnection, state utility rules, incentive programs and regulatory changes), commercial and utility-scale development (EPC contracts, construction delays, performance bonds, receivership, bankruptcy, asset sale and restructuring), real estate impacts (home value, solar leases, liens, title issues, HOA restrictions, easements), and emerging market structures such as battery storage, community solar, agrivoltaics, SRECs, yieldcos, and institutional investment funds. All content is based on publicly available regulatory, financial, and legal sources and is intended strictly for educational and informational purposes, not legal, tax, or financial advice. Readers should always verify current laws, utility policies, tax regulations, and contract terms with qualified licensed professionals before making decisions, as solar regulations, incentives, and financial structures frequently change across jurisdictions and time.