Financing Guide · Updated April 2026
Solar Loan Guide Maryland — Rates, Types & How to Compare
A solar loan lets you own your system, keep all Maryland incentives, and start saving from day one — with no upfront cost. Maryland homeowners with strong credit can secure rates from 4.5%–6.5%. Montgomery County residents have access to an exclusive 0%–2.99% loan through the Green Bank. This guide explains every loan type, what rates to expect, what to watch out for, and how to compare offers.
2026 Solar Loan Rate Snapshot
Current rates available to Maryland homeowners as of April 2026, from lowest to highest:
| Loan Type | Rate | Term | Best For |
|---|---|---|---|
| Montgomery Co. Green Bank (equity) | 0% | 10 yrs | Montgomery Co. homeowners with equity |
| Montgomery Co. Green Bank (standard) | 2.99% | 15 yrs | Montgomery Co. homeowners |
| Home Equity Loan / HELOC | 3.5%–6% | 10–20 yrs | Homeowners with significant equity |
| Unsecured Solar Loan (700+ credit) | 4.5%–6.5% | 10–25 yrs | Strong credit, no equity needed |
| Installer-Arranged Loan | 5.99%–8.99% | 10–25 yrs | Convenience — bundled with install |
| Unsecured Solar Loan (650–700) | 7%–9% | 10–20 yrs | Fair credit borrowers |
| Personal Loan | 8%–15% | 3–7 yrs | Last resort / small systems |
Why a Solar Loan Beats a Lease for Most Maryland Homeowners
The choice between a solar loan and a solar lease comes down to one question: do you want to own your solar system or simply use it? Ownership is almost always better financially in Maryland — but it requires qualifying for a loan.
Solar Loan — You Own the System
Solar Lease — Company Owns System
The bottom line: If you qualify for a solar loan, it almost always makes more financial sense than a lease in Maryland. The combination of SREC income, MSAP grants, county tax credits, and home value appreciation — all of which go to the system owner — makes ownership significantly more valuable over 25 years.
4 Types of Solar Loans Available in Maryland
Not all solar loans are the same. The right type depends on your home equity, credit score, and how much risk you're comfortable taking.
The most common type for Maryland solar. No collateral required — your home is not at risk if you default. Offered via lending partners (Mosaic, Sunlight Financial, GreenSky) or your own bank. Fast approval, typically 1–3 business days.
- ✓No home equity required
- ✓Fast approval — 1–3 days
- ✓Home not at risk if default
- ✗Higher interest rates than secured loans
- ✗Shorter terms = higher monthly payments
Uses your home's equity as collateral — offering the lowest interest rates of any solar financing option. A home equity loan gives a fixed lump sum at a fixed rate. A HELOC works like a credit line. Requires sufficient equity (typically 15–20% after borrowing).
- ✓Lowest rates available (3.5%–6%)
- ✓Longest terms — lower monthly payments
- ✓Interest may be tax-deductible
- ✗Home used as collateral — foreclosure risk
- ✗Requires equity and good credit (680+)
- ✗Slower approval — 2–6 weeks
Many Maryland installers offer financing through lending partners built into the quote process. Convenient — but watch for dealer fees added to the loan principal, which can effectively raise your true cost by 1%–4%.
- ✓One-stop-shop — financing through your installer
- ✓Fast approval during quote process
- ✓Often available for 25-year terms
- ✗Dealer fees can add 1%–4% to effective cost
- ✗May not be the lowest rate available
- ✗Always compare APR, not just advertised rate
An unsecured personal loan from a bank or credit union. Useful for small systems or gap financing, but the shortest terms and highest rates make it the least cost-effective option for a full Maryland installation.
- ✓No collateral required
- ✓Quick approval
- ✓Good for small systems or top-ups
- ✗Highest rates of all options
- ✗Short terms = high monthly payments
- ✗Not recommended for full systems
The Montgomery County Green Bank Loan — Maryland's Best Solar Financing
If you live in Montgomery County — covering Gaithersburg, Rockville, Bethesda, or Silver Spring — you may have access to the most favorable solar loan terms available anywhere in Maryland.
Montgomery County Green Bank Solar Loan
In partnership with Climate First Bank and fintech OneEthos, the Montgomery County Green Bank offers a 30-year solar loan program exclusively for Montgomery County homeowners. Over $3 million has already been issued within months of the program's launch — demonstrating exceptionally strong local demand.
How to access the Green Bank loan: Contact the Montgomery County Green Bank directly at montgomerycountygreen.bank or ask your installer if they are an approved participating contractor. Your installer applies on your behalf as part of the solar project financing process. The loan can include your solar panels, battery storage, roof replacement, and any necessary electrical upgrades — all in a single loan.
Solar Loan Interest Rates in Maryland (2026)
Interest rates for solar loans in Maryland vary based on loan type, credit score, and lender. Here's what to expect across the market in 2026:
| Loan Type | Credit Score Needed | Rate Range | Term | Best For |
|---|---|---|---|---|
| MC Green Bank (Equity Emphasis) | Varies | 0% then 7.99% | 30 years | Montgomery Co. low-moderate income |
| MC Green Bank (Standard) | Varies | 2.99% then 7.72% | 30 years | All Montgomery Co. homeowners |
| Home Equity Loan / HELOC | 680+ | 3.5%–6.0% | 10–20 yrs | High equity, low-rate priority |
| Unsecured Solar Loan (700+ credit) | 700+ | 4.5%–6.5% | 10–25 yrs | Most Maryland homeowners |
| Installer-Partnered Loan | 650+ | 5.99%–8.99% | 10–25 yrs | Convenience, one-stop process |
| Unsecured Loan (650–700 credit) | 650–700 | 7.0%–9.0% | 10–20 yrs | Moderate credit profiles |
| Personal Loan | 600+ | 8.0%–15.0% | 3–7 yrs | Last resort, smaller systems |
Watch out for dealer fees: Some installer-partnered loans advertise a low interest rate but include a dealer fee of 1%–4% added to the loan principal upfront. On a $36,000 system, a 4% dealer fee adds $1,440 to your loan balance before you make a single payment. Always ask your installer to disclose any dealer fees and factor them into your true cost comparison.
How a Solar Loan Affects Your Monthly Savings
The goal of a solar loan is for your monthly loan payment to be less than your current electricity bill — so you save money from day one. Here's how this works in practice for a typical Maryland homeowner:
| Scenario | System Size | Gross Cost | Monthly Payment | Monthly Bill Savings | Net Monthly Benefit |
|---|---|---|---|---|---|
| 10 kW · 6.5% · 15 yrs | 10 kW | $26,400 | ~$230 | ~$165/mo (BGE) | −$65 (negative first years) |
| 10 kW · 6.5% · 25 yrs | 10 kW | $26,400 | ~$178 | ~$165/mo (BGE) | −$13/mo initially |
| 10 kW · 6.5% · 25 yrs (Pepco) | 10 kW | $26,400 | ~$178 | ~$200/mo (Pepco) | +$22/mo savings |
| Green Bank (0%) · 30 yrs | 10 kW | $26,400 | ~$73 (yr 1–10) | ~$165/mo (BGE) | +$92/mo savings |
This table illustrates why the Montgomery County Green Bank loan is so powerful — the 0% rate for 10 years keeps monthly payments dramatically lower, turning a break-even situation into immediate meaningful savings. It also illustrates why cities with higher electricity rates (Pepco territory) have better loan economics than lower-rate areas like Frederick.
How to Compare Solar Loan Offers in Maryland
When your installer presents financing options — or when you shop around for your own loan — these are the numbers that matter most.
1. Compare APR, Not the Advertised Rate
The Annual Percentage Rate (APR) includes fees in the interest rate calculation, giving you a true cost comparison. A loan advertised at 4.99% with a 3% dealer fee has a much higher effective APR. Always ask: "What is the APR including all fees?"
2. Watch the Loan Term
Longer terms reduce your monthly payment but increase total interest paid. A $30,000 loan at 6.5% over 25 years costs $30,450 in interest. The same loan over 10 years costs $10,800 in interest — $19,650 less. If you can afford higher monthly payments, shorter terms are almost always better financially.
3. Check for Prepayment Penalties
Some solar loans charge a fee if you pay off the loan early. This matters because Maryland homeowners who receive SREC income, county credits, or state grants often want to apply those proceeds directly to their loan principal. The Montgomery County Green Bank loan has no prepayment penalties — a significant advantage.
4. Understand Dealer Fee Structures
Installer-partnered loans often include a dealer fee that is added to your loan principal. Some installers offer a choice: accept a higher interest rate to avoid the dealer fee, or accept a lower advertised rate with the fee built in. In most cases, you're better off getting your own loan from a bank or credit union and paying cash to your installer — removing the dealer fee entirely.
5. Confirm What Happens if You Sell Your Home
With an unsecured solar loan, the loan stays with you — not the home. You'd need to pay it off or assume it yourself after selling. With a home equity loan or HELOC, the balance is typically settled at closing like any other home debt. Always clarify this with your lender before signing.
Solar Loan Comparison Checklist
How to Get a Solar Loan in Maryland — Step by Step
Check Your Credit Score
Most Maryland solar loan lenders require a minimum score of 650. Scores above 700 unlock the best rates (4.5%–6.5%). Pull your free credit report at annualcreditreport.com and resolve any errors before applying. If your score is below 650, consider a co-borrower or look at lease options instead.
Get at Least 3 Solar Quotes First
Know your system cost before shopping for loans. Prices vary 15–25% between installers in Maryland. Use our free quote form to compare multiple licensed installers. Having a concrete project cost makes loan applications faster and more accurate.
Check If You Qualify for the Montgomery County Green Bank
If you live in Gaithersburg, Rockville, Bethesda, or Silver Spring, contact the Montgomery County Green Bank before accepting any installer-offered financing. The 0%–2.99% rates are far below market and can mean hundreds of dollars in savings per year.
Shop Your Own Bank or Credit Union
Before accepting an installer's financing offer, check rates from your own bank and local Maryland credit unions. You may qualify for better terms — and without dealer fees. If you have home equity, also get a HELOC or home equity loan quote to compare.
Compare APR Across All Options
Put all loan options side by side using APR (not just stated rate), monthly payment, loan term, and total interest paid. Use a simple loan calculator — many are free online. Choose the option with the lowest total cost over the loan term that fits your monthly budget.
Sign, Install, and Claim Maryland Incentives
Once approved, your installer receives funds and installation begins. After system activation, your installer should guide you through SREC registration and — if income-eligible — MSAP grant applications. As the system owner, all these incentives go directly to you, not the lender.
Frequently Asked Questions
What are solar loan interest rates in Maryland in 2026? ▾
Maryland homeowners with strong credit (700+) can secure fixed solar loan rates around 4.5%–6.5%. Those with moderate credit (650–700) typically see 7%–9%. Secured home equity loans offer the lowest rates at 3.5%–6%. Installer-partnered loans range from 5.99%–8.99% but may include dealer fees that raise the effective cost. The Montgomery County Green Bank offers 0% for 10 years (Equity Emphasis Area residents) or 2.99% for 15 years (other Montgomery Co. residents) — the most competitive solar financing in the state.
What is the Montgomery County Green Bank solar loan? ▾
The Montgomery County Green Bank, in partnership with Climate First Bank, offers a 30-year solar loan exclusively for Montgomery County homeowners. Residents in Equity Emphasis Areas receive 0% interest for the first 10 years (then 7.99%). Other residents receive 2.99% for the first 15 years (then 7.72%–8.00%). There are no dealer fees or prepayment penalties. The loan can include solar panels, battery storage, roof replacement, and electrical upgrades. Over $3 million was issued within months of the program launch.
Should I use a secured or unsecured solar loan in Maryland? ▾
A secured loan (home equity) offers lower rates (3.5%–6%) but uses your home as collateral. An unsecured solar loan costs more (6%–9%) but doesn't put your home at risk and is faster to obtain. For most Maryland homeowners, an unsecured solar loan or the Montgomery County Green Bank program strikes the best balance of access, speed, and risk. Only use a home equity loan if you have significant equity, strong credit, and are confident in your repayment ability.
What credit score do I need for a solar loan in Maryland? ▾
Most Maryland solar loan lenders require a minimum credit score of 650 for unsecured solar loans. Scores of 700+ unlock the best rates (4.5%–6.5%). Home equity loans typically require 680+ with sufficient equity. If your credit score is below 650, a solar lease or community solar subscription may be more accessible. Improving your credit score before applying — even by 20–30 points — can meaningfully reduce your interest rate and total loan cost.
Is a solar loan better than a solar lease in Maryland? ▾
For most Maryland homeowners who qualify, a solar loan is better long-term. Owning your system means you keep all Maryland SRECs ($200–$400/yr), may qualify for the MSAP grant (up to $7,500 for income-eligible homeowners), and the system adds to your home value. With a lease, the solar company retains all these benefits. However, leases may not require a credit check and involve no maintenance — making them a valid choice if you can't qualify for a loan or strongly prefer simplicity over maximum savings.
What happens to my solar loan if I sell my Maryland home? ▾
With an unsecured solar loan, the loan stays with you — not the home — so you'd typically pay it off when you sell or continue making payments yourself. With a home equity loan or HELOC, the balance is settled at closing like other mortgage debt. Since you own a solar system with an owned loan, the panels add to your home's value and can be marketed as an asset to buyers. This is a major advantage over leases, where buyers must agree to take on the lease — which can complicate or slow down a sale.
See solar costs and incentives for your city — including county-specific financing programs