Solar Loan Dealer Fee Unmasker: Calculate True APR & Hidden Origination Markup
When a solar salesperson offers you a 2.99% or 3.99% APR 25-year solar loan through GoodLeap, Mosaic, or Sunlight Financial, they are hiding a $9,000 to $14,000 dealer origination fee inside your principal balance on Day 1. Enter your loan quote below to unmask the exact dollar markup, your True Effective APR, and your 5-year early payoff loss.
Loan & Cash Benchmark Inputs
Your lender (GoodLeap / Mosaic / Sunlight / Dividend) is charging $11,400 (32.6% of your total loan) just to buy down the interest rate to 3.99%. Borrowing $23,580 of real solar hardware at $184/mo for 25 years is mathematically equivalent to a 8.16% APR loan!
Where Your $55,333 Total Commitment Actually Goes
📊 Side-by-Side Comparison: Dealer Loan vs. Cash vs. Direct Hardware
| Option | Day-1 Principal | Dealer Fee | Yr-5 Payoff Debt | Total Lifetime Cost |
|---|---|---|---|---|
| 3.99% Solar Dealer Loan | $34,980 | $11,400 (+48%) | $30,464 | $55,333 |
| Credit Union Loan (7.25% · $0 Fee) | $23,580 | $0 | $18,335 | $38,746 |
| Fair Market Cash Price | $23,580 | $0 | $0 | $23,580 |
| Direct Hardware (EG4 18kPV / EcoFlow) | $9,180 | $0 | $0 | $9,180 (Save $46,153) |
Skip the $14,000 Installer Markup: Direct-Purchase Hardware & Vetted Quotes
Turnkey solar salespeople routinely charge $3.60–$4.80/W by bundling 30% loan dealer fees and $12,000+ battery margins. Buying Tier-1 UL9540 hardware directly—either DIY or hiring a local licensed electrician ($1,500–$2,500)—cuts total cost by 50–65%.
EG4 18kPV Inverter + 14.3kWh PowerPro WallMount
The gold-standard UL9540 all-in-one hybrid system. Pair an 18kW PV input hybrid inverter (200A pass-through) with an indoor/outdoor IP65 14.3kWh LiFePO4 WallMount battery—saving $12,000+ vs turnkey quotes.
- 18kW PV Input / 12kW Continuous AC Output (200A Pass-Through)
- 14.3kWh LiFePO4 (8,000+ cycles @ 80% DoD)
- UL9540 & UL1741-SB Certified for Permit Approval
EcoFlow Delta Pro Ultra (6kWh–30kWh Modular)
Skip the $30,000 contractor quote and 6-month utility interconnection wait. Delivers 7.2kW–21.6kW continuous 120V/240V split-phase output and 5.6kW Solar Input right out of the box—expandable up to 90kWh.
- 7,200W–21,600W 120V/240V Split-Phase Output
- 6.1kWh LFP Stackable Battery (scales to 30kWh–90kWh)
- 5,600W Solar Input — Zero Roof Permit Required for Portable PV
Renogy 48V Off-Grid & Hybrid LFP Solar Kit
Complete modular 48V architecture combining high-efficiency N-type bifacial panels, a 48V 3,500W–5,000W MPPT inverter-charger, and smart modular LiFePO4 storage at ~$1.15/W hardware cost.
- 48V High-Efficiency Bus (75% lower copper wire loss)
- Modular 48V 50Ah / 100Ah Smart LiFePO4 Battery Bank
- Complete Plug-and-Play MPPT All-in-One Controller
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Frequently Asked Questions About Solar Loan Dealer Fees
What is a hidden solar loan dealer fee?
A solar loan dealer fee (or origination buydown fee) is an upfront bank charge of 22% to 35% that solar lenders like GoodLeap, Mosaic, Sunlight Financial, and Dividend add directly to your loan principal in exchange for advertising an artificially low interest rate (such as 2.99% or 3.99% APR). On a $24,000 cash system, a 32% dealer fee inflates your Day-1 loan balance to $35,294.
Why is a 3.99% APR solar loan actually equivalent to ~9.2% True Effective APR?
Because the lender inflates your principal balance by $10,000–$12,000 on Day 1, your monthly payment on that inflated principal is identical to borrowing the true cash value of the equipment at 8.8% to 9.5% APR—except with a solar loan, the interest is front-loaded into non-refundable principal.
What happens if I pay off a low-APR solar loan early or sell my house in 5 years?
You lose 100% of the dealer fee. With a normal 8.5% credit union loan, paying off early saves you 20 years of future interest. With a 3.99% solar loan, the 30% fee was baked into your principal balance on Day 1, meaning you still owe more in Year 5 than the system was worth in cash when installed.
Holding a proposal from GoodLeap, Mosaic, or a solar lender? Check your exact $/W markup, hidden 30% dealer fees, and NREL yield in 10 seconds.