Essential Project Financing Glossary for Contractors and Investors
The same unfamiliar term shows up in completely different conversations. A contractor hears "dealer fee" on a battery storage quote. An investor hears "business-purpose loan" on a fix-and-flip draw schedule. A fleet owner hears "residual value" on a truck lease comparison. Different projects, same vocabulary gap, and the gap costs time, and sometimes a deal, when nobody stops to ask what a term actually means.
Across more than 30,000 financing proposals processed at Eos Loan, the same handful of terms trip up contractors and investors regardless of which essential project they are financing: APR, direct lender, term length, business-purpose loan, and "subject to approval." This page defines those terms and more, organized by solution, so you can look up one definition or read straight through before your next proposal.
> Key Takeaways
> - APR is the full annual cost of financing, not just the interest rate; comparing APR across lenders saved borrowers an average of $1,500 on home improvement loans (CFPB, 2024).
> - Eos Loan is a direct lender, never a broker or marketplace, and charges no dealer fee on any program.
> - Battery storage is the only category with a stated financing term range (6 to 240 months); EV charger, water filtration, truck fleet, and real estate financing are described as flexible terms.
> - "Business-purpose loan" and "mortgage" are not interchangeable; investor financing on a non-owner-occupied property is classified differently under federal lending rules.
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How Should You Use This Glossary?
Use this page as a lookup, not a required read-through. Each section below covers one Eos Loan solution category: battery storage, EV charger, water filtration, truck fleet, and real estate. A shared "Universal Terms" section up top covers the five terms that show up in nearly every financing conversation, regardless of category.
Illustrative map of the five Eos Loan solution categories this glossary covers. Categories are shown for navigation only, not ranked, weighted, or sized by volume.
Skip straight to your category, or read the Universal Terms section first if a financing offer just landed on your desk and you need the vocabulary fast.
What Are the Universal Financing Terms Every Contractor and Investor Should Know?
APR, direct lender, term length, monthly payment, and "subject to approval" are the five terms that recur across every essential project category, and getting them wrong is the single most common source of confusion in a financing conversation. Here is what each one means.
APR (annual percentage rate) is the full annual cost of financing, including the interest rate plus any fees rolled into the loan, expressed as one percentage. In 2024, the Consumer Financial Protection Bureau found that borrowers who compared APR across at least two lenders saved an average of $1,500 in interest on a home improvement loan (CFPB, 2024). APR disclosure is required on consumer financing offers under the Truth in Lending Act, Regulation Z (CFPB, ongoing). Eos Loan never quotes a specific APR as a blanket rate; every rate depends on underwriting and is subject to approval.
Direct lender means the company funding the loan is the same company you are talking to, with no intermediary in between. A broker or marketplace, by contrast, is a real and common industry role: it collects your application and routes it to one or more third-party lenders, who then decide and fund. Eos Loan operates as a direct lender only, never as a broker or marketplace, which means one underwriting conversation and one point of contact from application to funding.
Term length is the number of months over which the loan is repaid, and monthly payment is the dollar figure your customer or your business actually budgets against. "Subject to approval / eligibility" means every quoted scenario depends on underwriting; no financing offer guarantees approval before that review happens.
One term deserves its own deep dive rather than a repeat here: dealer fee, the discount a lender takes off the funded amount, is a normal part of point-of-sale lending, but it changes total cost depending on how it is disclosed. Eos Loan charges no dealer fee on any program. For the full mechanics and a line-by-line checklist, see Dealer Fees Explained. For the math behind how term length moves a monthly payment, see Financing Terms Explained: APR, Term Length, and Monthly Payment Math.
What Do Battery Storage Financing Terms Mean?
Battery storage financing carries the widest term range in the Eos Loan lineup: 6 to 240 months (per Eos Loan program terms, 2026), and that range changes how several terms below apply. A longer available term means a lower possible monthly payment on the same system cost, which is why term length gets more attention in battery conversations than almost anywhere else.
Battery energy storage (never "battery backup" as the primary label) is the core product. Interconnection is the utility process that approves a system to connect to the grid, and financing timelines sometimes need to flex around it. Critical load describes the specific circuits a system is sized to keep powered during an outage, which affects system size and, in turn, the amount financed. Total cost of ownership compares the financed cost against a cash purchase over the system's life, including the warranty period, which should roughly track the financing term chosen.
Source: Eos Loan program terms, 2026. Battery storage is the only category with a stated month range; EV charger, water filtration, truck fleet, and real estate financing are described as flexible terms without a stated month count.
For the full solution page, see battery energy storage financing.
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What Do EV Charger Financing Terms Mean?
"EV charger" is the correct term industry-wide; "EV car charger" is redundant and worth dropping from your own vocabulary when you talk to customers or lenders. Financing conversations in this category hinge on a handful of terms tied to what is actually being installed and how it gets paid for.
Level 2 chargers are the standard for most workplace, multifamily, and retail installs; DC fast chargers deliver a much faster charge at meaningfully higher equipment and electrical cost, which changes the amount financed. A demand charge is a utility fee based on peak electricity draw rather than total usage, and it matters in financing conversations because it affects a site's ongoing operating cost, not the loan itself. Make-ready infrastructure refers to the electrical and conduit work done in advance of charger installation, sometimes financed as its own line item. Rebate stacking means applying a utility or state rebate on top of financing, not instead of it, since financing covers the cost upfront while a rebate arrives later.
EV charger financing terms are flexible rather than fixed to a stated month range. For the full solution page, see EV charger financing.
What Do Water Filtration Financing Terms Mean?
"Water filtration" is the canonical term for this category; "water purification" describes a narrower process and is not the preferred label here. The terms that matter most distinguish scale and system type, since both drive the amount financed and who the buyer is.
Point-of-use filtration treats water at a single tap, while whole-home filtration treats all water entering a property, a distinction that changes both equipment cost and installation scope. A reverse osmosis system is a specific filtration technology often financed as an upgrade rather than a full system replacement. Commercial filtration financing (restaurants, schools, multi-unit properties) differs from residential filtration financing mainly in system scale and the buyer's underwriting profile, not in the vocabulary itself.
Water filtration financing, like EV charger financing, uses flexible terms rather than a stated month range. For the full solution page, see water filtration financing.
What Do Truck Fleet Financing Terms Mean?
Fleet financing vocabulary belongs to the buyer, the carrier, owner-operator, distributor, or municipal fleet manager who is purchasing the truck, not to an installer, since there is no installation step in this transaction the way there is with the other four categories. Getting the buyer-side terms right matters because they drive the underwriting conversation directly.
Lease vs. buy (loan) is the first fork: a lease typically returns the truck at term end, while a loan builds toward ownership. Down payment is the upfront amount that reduces the financed balance. DOT authority is the federal operating authority a carrier holds, and lenders may reference it as part of eligibility review. ELD data (electronic logging device records) can factor into underwriting conversations as a proxy for operating history. Reefer trailer financing is a common use-case term for refrigerated trailers, financed the same way as a dry van or tractor, just with different equipment cost.
Fleet financing, like the two categories above, uses flexible terms rather than a stated month range. For the full solution page, see truck fleet financing.
What Do Business-Purpose Real Estate Financing Terms Mean?
Real estate financing terms here are business-purpose only; a mortgage is a consumer product for an owner-occupied home, and it belongs in this glossary only as a contrast, never as a description of what Eos Loan offers. This is not a consumer mortgage, and nothing in this section applies to buying a place to live in.
A business-purpose loan is classified by the purpose of the funds and the property's use, not simply by property type. Fix and flip describes financing a short-term renovation-and-resale project, while fix and hold describes financing a renovation the investor intends to keep as a rental. After-repair value (ARV) is the estimated property value once renovation work is complete, and lenders often size a loan against it. A construction draw releases financing in stages tied to renovation progress, and a seasoning requirement is the minimum ownership period some lenders require before certain refinance scenarios apply.
The direct-lender-versus-broker distinction defined in the Universal Terms section applies identically here: a business-purpose investor evaluating capital sources should ask the same "who is actually funding this" question a contractor asks when comparing financing partners. Most single-category glossaries miss this connection because they stay inside one vertical. For the full solution page, see business-purpose real estate financing.
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Frequently Asked Questions
What does APR mean in equipment or project financing?
APR is the full annual cost of financing expressed as one percentage, including the interest rate plus applicable fees, not just the interest rate alone. Comparing APR across lenders saved borrowers an average of $1,500 on home improvement loans (CFPB, 2024). Disclosure is required under the Truth in Lending Act, Regulation Z.
What is the difference between a direct lender and a broker or marketplace?
A direct lender funds the loan itself, with no third party in between. A broker or marketplace is a real industry role that routes an application to one or more outside lenders, who then decide and fund. Eos Loan operates as a direct lender only, never as a broker or marketplace.
What does "subject to approval" mean on a financing offer?
It means the quoted scenario depends on underwriting review; no financing offer guarantees approval before that review is complete. Eos Loan never implies guaranteed approval on any program, regardless of essential project category.
Why do battery storage terms go up to 240 months while other categories use "flexible terms"?
Battery storage is the only Eos Loan category with a stated month range, 6 to 240 months, per Eos Loan program terms (2026). EV charger, water filtration, truck fleet, and real estate financing are each described as flexible terms without a stated month count.
What does "business-purpose loan" mean for a real estate investor?
It means the financing is tied to an investment or business property and its intended use, not a consumer mortgage for an owner-occupied home. The classification depends on the purpose of the funds and the property's use, not simply on property type.
The Bottom Line
The vocabulary gap is the same whether the conversation starts with a battery storage quote, an EV charger proposal, a water filtration bid, a truck purchase, or a real estate draw schedule. APR is the full cost, not just the rate. Direct lender means one company, start to finish. Battery storage is the one category with a stated term range; everything else here is flexible. Business-purpose is not a mortgage. Bookmark this page and come back to it the next time an unfamiliar term shows up on a proposal.
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Sources
- Consumer Financial Protection Bureau, Mortgages and APR comparison savings guidance, retrieved 2026-09-30, https://www.consumerfinance.gov/consumer-tools/mortgages/
- Consumer Financial Protection Bureau, Regulation Z, Truth in Lending Act disclosure requirements, retrieved 2026-09-30, https://www.consumerfinance.gov/rules-policy/regulations/1026/
- Eos Loan program terms (battery storage financing term range, 6 to 240 months; company figures, $4B+ originated, 30k+ proposals processed), 2026
About the author: Eduardo Donadi is the CEO of Eos Loan, the fintech built to finance essential projects (battery energy storage, EV chargers, and water filtration) for installers, contractors, and resellers across the United States.