Buying guide
Can you roll a generator into a mortgage or construction loan?
Yes. A standby generator can be financed inside a construction loan, a renovation mortgage such as FHA 203(k) or Fannie Mae HomeStyle, a home equity loan or HELOC, or a home improvement installment loan. The cheapest time is during a build, when the trenching, gas line and pad work is already open.
Why timing beats the interest rate
A standby generator install is mostly trenching, conduit, a gas line and a pad. During construction all of that is already open, already scheduled, and already being paid for by somebody. Adding the generator to that scope is incremental. Adding it after the landscaping is in means cutting it back open.
If you are building or doing a substantial renovation and a generator is on your list, price it now. What the installation involves.
The four routes, ranked by when they make sense
1. Inside a construction loan
The cleanest option if you are building. The generator becomes a line in the build budget, drawn like any other allowance, and on a construction-to-permanent loan it is financed over the permanent loan rather than paid in cash. Your builder will want our itemized bid early enough to fold into the schedule of values.
2. Inside a renovation mortgage
FHA 203(k) and Fannie Mae HomeStyle fund permanent improvements, and a permanently installed standby generator is affixed to the property and conveys at sale. Whether it qualifies is the lender's decision, and they will want a contractor bid with a license number on it.
3. Home equity loan or HELOC
For an existing home with equity, this is usually the lowest-cost borrowing available and it does not touch the first mortgage. The trade is that it is secured by the house and the draw period has its own arithmetic. Price it against option four.
4. A straight home improvement installment loan — or Affirm on the equipment
Typically unsecured, with no appraisal and no lien on the property. Terms, fees and whether a rate check is a soft or hard inquiry vary by lender, so ask before you apply.
Affirm is the other route on this page, and it applies to a different situation: buying the generator on its own, with your own licensed electrician doing the installation. Chosen at checkout like any other payment method, over 3 to 36 months, on totals up to $30,000 including freight and tax. It is an equipment purchase, not a way to split an installed project. When we do the installation, the generator and the work are one contract at one price, so the loan above is what funds it. How both work.
The route to be careful with: refinancing an existing mortgage purely to fund a generator. On a typical installed 20kW system, estimated at $13,500 to $17,000, closing costs can exceed the interest saved, and giving up a low fixed rate to fund an improvement is an expensive trade. Compare the total cost of each route first. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate.
Pre-wire now, add the unit later
If the budget will not stretch to the generator during the build, install the infrastructure anyway — the automatic transfer switch, the pad, the conduit run and the gas stub. That is the part that is disruptive and expensive to retrofit. Adding the generator afterwards becomes a connection rather than a project, and the infrastructure is financed inside the build where it belongs.
We quote this as a standalone scope for builders and for homeowners who know a generator is coming eventually. Transfer switches are here.
What your lender will ask us for
Every route above except the unsecured loan needs paperwork from the installer: usually an itemized bid on letterhead separating equipment, labor and permits, and the Texas electrical contractor license number, TECL #40628. If your lender asks for anything further, send us the request.
The install must be permitted and inspected. An unpermitted generator is a disclosure problem at resale, and no financing route changes that. What your city can and cannot require.
Financing questions
Can a generator be included in a construction loan?
Yes, and it is the cheapest time to do it. A generator installed during construction shares trenching, conduit, gas line and slab work that would otherwise be billed separately later. The cost is drawn against the build like any other allowance item, so it is financed over the life of the loan rather than paid out of pocket.
Can I add a generator to a renovation mortgage?
Often. FHA 203(k) and Fannie Mae HomeStyle renovation loans fund permanent improvements to the property, and a permanently installed standby generator is affixed to the property and conveys at sale. Whether it qualifies under a given program is the lender's call, and they will want an itemized contractor bid. We provide one written for that purpose.
Is it worth refinancing my mortgage to pay for a generator?
Usually not. On a typical installed 20kW system, estimated at $13,500 to $17,000, closing costs on a refinance can exceed the interest saved, and resetting a low-rate mortgage to fund an improvement is an expensive way to borrow. A home equity line or a straight installment loan is normally the better arithmetic. Run both before deciding. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate.
Do I need a generator installed before closing, or can I pre-wire?
You can pre-wire. Installing the automatic transfer switch, the pad, the conduit and the gas stub at build time and adding the generator later is a legitimate middle path — the expensive, disruptive work is done while the walls are open, and the later install becomes a connection rather than a project. It also lets a buyer finance the infrastructure inside the build and buy the unit when they are ready.
Will a generator appraise?
A permanently installed, permitted standby generator is a fixture and is normally treated as part of the property. Whether an appraiser assigns it dollar-for-dollar value is a separate question, and you should not assume full cost recovery. What reliably matters is that it was permitted and inspected — an unpermitted generator is a title and disclosure problem regardless of what it cost.
Can I just pay monthly for the generator itself?
Yes, and it is the fastest route. Equipment on this site can be paid monthly with Affirm at checkout over 3 to 36 months, with a soft credit check and no application to chase. It covers a standalone equipment purchase where you arrange your own licensed installer, not an installed project — when we install, the equipment and the work are one contract at one price. Affirm caps a single transaction at $30,000 including freight and tax. Full detail here.
What does the lender need from the installer?
Usually an itemized bid on contractor letterhead showing equipment, labor, permits and total, and the contractor license number: ours is TECL #40628. If your lender asks for anything else, tell us what it is. Request a lender-ready quote.
Need a bid your lender will accept?
Tell us it is going to underwriting and we will itemize it accordingly, with the license number on it. The survey is free either way.