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Propel captures the 30% federal ITC through third-party ownership. Tesla offers the lowest $/W pricing but provides zero tax credit in 2026. This comparison breaks down which approach saves you more money over 25 years — and why the answer is not as obvious as it seems.
Quick Answer
Propel and Tesla Solar represent two fundamentally different approaches to going solar in 2026. Tesla offers aggressive pricing ($1.99-$2.49/W) with immediate ownership through cash or loan purchase, but provides $0 in federal tax credit since Section 25D expired. Propel is a managed solar product through Concert Finance that captures the 30% commercial ITC via a third-party owner — reducing your effective cost by $9,000-$15,000. For an 8 kW system, Propel's higher APR (7.79-9.79%) is offset by the ITC capture, making the 25-year net cost competitive with Tesla. Propel wins on ITC savings and maintenance coverage. Tesla wins on immediate ownership, Powerwall ecosystem, and wider availability.
Propel is a Transitional Ownership product. A third-party business entity owns the system on your roof for 5 years, claims the 30% Section 48E commercial ITC, and provides a performance guarantee plus free maintenance. You make one fixed monthly payment to Concert Finance (loan originated by Medallion Bank, FDIC). At year 5, ownership transfers automatically. No escalator, no dealer fees, no prepayment penalty.
The ITC advantage
Propel captures 30-50% of system cost as ITC, embedded in your lower payment. For a $30,000 system, that is $9,000-$15,000 in savings that Tesla buyers do not get.
Tesla Solar is a direct purchase product. You buy the system with cash or through a Tesla-partnered loan. Pricing is aggressive at $1.99-$2.49/W — among the lowest in the industry. You own the system from day one. However, since the residential solar tax credit (Section 25D) expired on December 31, 2025, Tesla buyers receive $0 in federal tax credit. The full system cost is what you pay.
The Powerwall ecosystem
Tesla's Powerwall battery integrates seamlessly with their panels and app. The Tesla ecosystem (solar + Powerwall + EV charging) is unique and a genuine advantage.
These are fundamentally different products: one is a managed financing structure that captures tax benefits, the other is a straightforward equipment purchase. The question is whether the ITC capture is worth the higher APR and 5-year ownership delay.
Every important metric, side by side.
| Feature | Propel | Tesla Solar |
|---|---|---|
| Company type | Installer + Concert Finance | Tesla Energy (direct) |
| Purchase model | TPO (ESA + loan) | Cash or Tesla loan |
| Upfront cost | $0 down | $0 down (loan) or full cash |
| Federal ITC (2026) | 30% captured (Section 48E) | $0 (Section 25D expired) |
| Effective cost (8 kW) | ~$17,500-$21,000 after ITC | ~$16,000-$20,000 (no ITC) |
| APR / financing | 7.79-9.79% (25 yr) | ~4-6% (varies) |
| Monthly payment (8 kW) | ~$210-$250/mo | ~$140-$180/mo (loan) |
| Total paid (25 yr, 8 kW) | ~$63,000-$75,000 | ~$42,000-$54,000 (loan) |
| ITC savings embedded | $7,500-$12,500 | $0 |
| Net cost after ITC value | ~$50,500-$62,500 | ~$42,000-$54,000 |
| Ownership | Year 5 (automatic) | Day 1 |
| Panels | Silfab 440W (USA-made) | Tesla panels (overseas) |
| Inverter | Varies by installer | Tesla Solar Inverter |
| Battery | Compatible options | Tesla Powerwall |
| Ordering experience | Local installer (NuWatt) | Online self-service |
| Performance guarantee | 85% kWh (years 1-5) | Panel warranty only |
| Maintenance (years 1-5) | Included free | Your responsibility |
| FICO requirement | 660+ | Varies by lender |
| Availability | ME, TX only | Most U.S. states |
| Escalator | None (fixed) | None (fixed loan) |
Company type
Propel
Installer + Concert Finance
Tesla
Tesla Energy (direct)
Purchase model
Propel
TPO (ESA + loan)
Tesla
Cash or Tesla loan
Upfront cost
Propel
$0 down
Tesla
$0 down (loan) or full cash
Federal ITC (2026)
Propel
30% captured (Section 48E)
Tesla
$0 (Section 25D expired)
Effective cost (8 kW)
Propel
~$17,500-$21,000 after ITC
Tesla
~$16,000-$20,000 (no ITC)
APR / financing
Propel
7.79-9.79% (25 yr)
Tesla
~4-6% (varies)
Monthly payment (8 kW)
Propel
~$210-$250/mo
Tesla
~$140-$180/mo (loan)
Total paid (25 yr, 8 kW)
Propel
~$63,000-$75,000
Tesla
~$42,000-$54,000 (loan)
ITC savings embedded
Propel
$7,500-$12,500
Tesla
$0
Net cost after ITC value
Propel
~$50,500-$62,500
Tesla
~$42,000-$54,000
Ownership
Propel
Year 5 (automatic)
Tesla
Day 1
Panels
Propel
Silfab 440W (USA-made)
Tesla
Tesla panels (overseas)
Inverter
Propel
Varies by installer
Tesla
Tesla Solar Inverter
Battery
Propel
Compatible options
Tesla
Tesla Powerwall
Ordering experience
Propel
Local installer (NuWatt)
Tesla
Online self-service
Performance guarantee
Propel
85% kWh (years 1-5)
Tesla
Panel warranty only
Maintenance (years 1-5)
Propel
Included free
Tesla
Your responsibility
FICO requirement
Propel
660+
Tesla
Varies by lender
Availability
Propel
ME, TX only
Tesla
Most U.S. states
Escalator
Propel
None (fixed)
Tesla
None (fixed loan)
Before 2026, comparing solar options was straightforward — everyone got the same 30% federal tax credit regardless of how they financed. Now that Section 25D has expired, the tax credit is the single biggest variable in the comparison. Here is how it plays out.
| Metric | Propel (8.99%) | Tesla (cash) | Tesla (5.49% loan) |
|---|---|---|---|
| System cost (8 kW) | $25,000 | $16,000-$20,000 | $16,000-$20,000 |
| Federal ITC | 30% captured ($7,500) | $0 | $0 |
| Net effective cost | ~$17,500 | $16,000-$20,000 | $16,000-$20,000 |
| Monthly payment | ~$225/mo | $0 (paid upfront) | ~$130-$160/mo |
| Total paid (25 yr) | ~$67,500 | $16,000-$20,000 | ~$39,000-$48,000 |
| Performance guarantee | Yes (85%, 5 yr) | No | No |
| Maintenance included | Yes (5 yr) | No | No |
| Ownership | Year 5 | Day 1 | Day 1 |
Tesla pricing based on $2.00-$2.49/W. Propel pricing based on $3.12/W with Silfab 440W. ITC at 30% base. Actual costs vary by location and system specifics.
The honest math
Tesla wins on raw total cost because of lower per-watt pricing and lower loan rates. Propel's ITC capture narrows the gap significantly, but it does not always close it entirely. Where Propel wins is for homeowners who: (a) do not have cash for a Tesla purchase, (b) want the ITC benefit that is otherwise inaccessible, (c) value the performance guarantee and included maintenance, or (d) want $0 down without using their own loan capacity.
The ITC capture is the reason Propel exists. Without it, Propel would simply be an expensive loan. With it, Propel offers something no other financing product can match in 2026: a way for homeowners to access the commercial tax credit that was designed for businesses. For many homeowners, that access is worth the higher APR.
Tesla has legitimate advantages over Propel in several areas. This section gives Tesla its fair due.
Tesla buyers own the system from day one. No 5-year managed phase, no third-party owner, no ESA. The system is yours and adds value to your home immediately. For homeowners who strongly prefer outright ownership, this is the most important factor.
If you have cash, Tesla offers the lowest price in the industry at $1.99-$2.49/W. A $16,000-$20,000 cash purchase beats Propel's $67,500+ in total payments every time. The trade-off is losing the ITC benefit, but for cash buyers who prioritize simplicity, Tesla is hard to beat.
Tesla's Powerwall integrates seamlessly with Tesla solar panels, the Tesla app, and the broader Tesla ecosystem (EV charging, virtual power plant participation). No other battery matches the Powerwall's software integration. If you are already in the Tesla ecosystem, this is a significant draw.
Tesla is one of the most recognized brands in energy. This matters for home resale — a Tesla solar system on your roof is a selling point that buyers immediately understand. Propel is a newer, less familiar product that requires explanation.
Tesla Solar is available in most U.S. states. Propel is limited to Maine and Texas. For the vast majority of American homeowners, Tesla is accessible and Propel is not.
Tesla's ordering process is entirely online — upload your bill, get a design, place an order, schedule installation. No in-person meetings, no sales appointments. If you prefer a self-service, Amazon-like buying experience, Tesla delivers that.
Propel's advantages are concentrated in areas that Tesla cannot match due to the fundamental differences in their business models.
This is Propel's defining advantage. Since Section 25D expired, homeowners get $0 in tax credit. Propel captures the 30% commercial ITC (plus potential FEOC and energy community bonuses up to 50%) through its third-party ownership structure. For a $30,000 system, that is $9,000-$15,000 in savings that Tesla buyers cannot access. This is not a small difference — it is the single largest cost variable in residential solar in 2026.
Propel requires $0 down and charges 0% dealer fees. Tesla cash purchases require the full amount upfront. Tesla loans require a down payment for some programs. Propel is the genuine $0 out-of-pocket option with an ownership path.
During the 5-year managed phase, Propel guarantees your system will produce at least 85% of estimated annual kWh. If it falls short, you get a credit. Tesla offers a panel warranty but does not guarantee actual production. This is a meaningful difference — actual production can vary significantly based on weather, shading, and equipment performance.
Propel covers all maintenance, repairs, and monitoring during the managed phase at no extra cost. Tesla buyers are responsible for any maintenance from day one. While solar systems require little maintenance, inverter issues, bird damage, and storm impacts do happen — and they are expensive if you are paying out of pocket.
Propel through NuWatt means working with a local installer who designs, permits, installs, and supports your system. Tesla's process is more automated and impersonal. If something goes wrong or you have questions, having a local contact makes a significant difference in customer experience.
Propel requires Silfab 440W panels manufactured in the United States. Tesla panels are manufactured overseas. The domestic content angle matters for ITC bonus eligibility and for homeowners who prefer American-made equipment.
Here is a scenario-based guide to help you decide.
Cash purchase at $1.99-$2.49/W is the lowest total cost. You own from day one with no financing complexity. The missing ITC stings, but the low price partially compensates.
Propel is the only $0-down option that captures the 30% commercial ITC in 2026. Tesla loans require down payments and offer no tax credit.
Tesla's Powerwall ecosystem is unmatched. If Powerwall integration is a priority, Tesla is the clear choice.
Run the numbers for your system size and credit tier. Propel's ITC capture makes it competitive with Tesla loans. For larger systems with the FEOC + energy community bonuses, Propel can be cheaper.
Propel is not available in your state. Tesla is your most cost-effective direct purchase option for most markets.
The 85% production guarantee and 5-year maintenance coverage are genuine protections that Tesla does not offer.
Here is the full 25-year projection for a typical 8 kW system under three scenarios, accounting for electricity savings, ITC value, and total payments.
Honest assessment
Tesla cash purchase is the best raw financial outcome — if you have $18,000+ available. Tesla loan is also competitive. Propel's strength is that it requires $0 down, captures the ITC, and includes protections (performance guarantee, maintenance) that the other options do not. For homeowners who cannot or prefer not to put cash down, Propel is the clear winner over any loan option because of the ITC capture.
Enter your monthly electric bill to compare lease escalators vs. fixed Propel ownership payments.
Compare lease escalators vs. Propel ownership by state
Lease Total
$64,356
over 25 years
Propel Total
$31,824
fixed 25 years, own yr 5
You Save
$32,532
with Propel
Crossover Year
Year 1
Lease > Propel
Auto-sized system: Based on your $200/mo bill in Massachusetts, a ~6.5 kW system would offset your usage, producing ~7,800 kWh/year.
Lease: $141/mo starting (PPA at $0.22/kWh = 70% of utility rate) | Propel: $102/mo fixed for 25 years | System: $20,020 (6.5 kW @ $3.08/W)
Massachusetts is on the Propel waitlist — join the waitlist
No. Tesla Solar is a direct purchase product — you buy the system with cash or a Tesla loan. Since the residential solar tax credit (Section 25D) expired December 31, 2025, individual homeowners receive $0 in federal tax credit. This is one of the biggest differences vs Propel, which captures the 30% commercial ITC through a third-party ownership structure.
Tesla's pricing ($1.99-$2.49/W) is among the lowest in the industry, which means a lower total system cost. However, Tesla buyers in 2026 get no federal tax credit. Propel captures a 30% ITC that reduces the effective cost by $9,000-$15,000 for a typical system. When you compare effective cost after ITC, Propel is often cheaper despite the higher APR. The break-even depends on system size and credit tier.
Propel supports battery storage, but not Tesla Powerwall specifically. Propel requires Silfab 440W panels and works with compatible battery systems. If having a Tesla Powerwall is important to you (for the Tesla app ecosystem, virtual power plant participation, or Powerwall-specific features), you would need to go with Tesla directly — but you would forgo the ITC benefit.
Tesla uses their own proprietary panels and the Tesla Solar Inverter. Propel uses Silfab 440W panels (440W, USA-made, 25-year warranty). Both are quality products. Tesla's panels are manufactured overseas and do not qualify for FEOC domestic content bonuses. Silfab panels are made in the USA and qualify for the +10% FEOC ITC bonus. For pure specifications, they are comparable. For ITC purposes, Silfab is superior.
Tesla's process is online-first: you order through tesla.com, upload your electric bill, get an automated design, and schedule installation. It is streamlined but impersonal. Propel through NuWatt involves working with a local installer who designs a custom system, walks you through financing options, handles permitting, and provides ongoing support. If you value personal service, Propel is better. If you prefer self-service, Tesla wins.
With Tesla (cash purchase), the system is already yours — include it in the sale price. With Tesla (loan), pay off the loan or have the buyer assume it. With Propel (before year 5), transfer the loan and ESA to the buyer or buy out the system. With Propel (after year 5), the system is yours — include it in the sale price. Both add value to the home, but owned solar (Tesla cash or Propel after year 5) adds more than a system with an outstanding loan or ESA.
Tesla Solar is available in both Maine and Texas, as well as most other U.S. states. Propel is currently limited to Maine and Texas only. So in those two states, you have both options. Outside ME and TX, Propel is not an option, making Tesla (or another provider) your path to solar.
With excellent credit (760+ FICO), you qualify for Propel's lowest APR (7.79%) and also for competitive Tesla loan rates (typically 4-6%). The decision comes down to the ITC: Tesla offers no federal tax credit in 2026 (Section 25D expired), while Propel captures 30%. For a $30,000 system, that is $9,000+ in value. Even with excellent credit and a lower Tesla loan rate, Propel's ITC capture typically makes it the better financial outcome over 25 years.
Get a free Propel quote with your estimated payment, ITC savings, and 25-year cost analysis. Compare it to a Tesla quote side by side.
Propel financing by Concert Finance. Loans by Medallion Bank, FDIC. Tesla and Powerwall are trademarks of Tesla, Inc. NuWatt is not affiliated with Tesla.
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Elena helps homeowners plan whole-home electrification projects — solar, heat pumps, batteries, and EV charging. She focuses on financing strategies and long-term energy savings.