Insurance Claim Guides
How To Document Aftermarket Modifications So Your Claim Actually Pays
Published January 22, 2026 | Updated February 27, 2026 | By OCRV Center
The short answer
A carrier pays actual cash value on what is documented in the file, not on what is bolted to the vehicle. Photograph every modification at install, keep the receipts, and build an itemized inventory with dates and cost. Then get the high-value items scheduled or covered by an agreed value endorsement before you ever need them.
01
The Declarations Page Is the Vehicle, As Far As the Carrier Knows
An adjuster valuing a loss starts from a stated vehicle: year, make, model, and whatever endorsements appear on the declarations page. A $28,000 build sitting on top of a base Sprinter is invisible in that process unless something in the file makes it visible. This is not the carrier being difficult. It is the carrier having no mechanism to pay for equipment nobody ever told it existed and nobody ever collected premium for.
The consequence lands hardest on the two ends of the spectrum. Owners of van conversions and overland builds routinely carry more value in the build than in the chassis. Owners of older coaches with a decade of accumulated upgrades find the actual cash value calculation running off a base model comparable in Escondido that has none of it. In both cases the fix happens before the loss, not during it.
02
What an Inventory Has To Contain To Be Usable
A list of items is not an inventory. What survives adjuster review is a spreadsheet where every line has a description specific enough to price, a date, a cost, an installer, and a photograph. Model numbers matter enormously here, because the difference between two lithium banks of the same nominal capacity can be several thousand dollars and no adjuster will assume in your favor. Save the invoice as a file next to the photograph, not in a drawer in a house you may not be at.
Keep it somewhere that is not in the vehicle. Owners lose the paperwork in the same fire that destroys the equipment more often than you would think. Cloud storage, an email to yourself, a copy with a family member. Any of those beats a binder in the pass-through compartment.
- Item description with brand and model number, not a generic category
- Install date and the name of the shop or the note that it was owner installed
- Purchase price with the invoice or receipt attached as a file
- Photographs during install showing the item mounted and wired
- Photographs after install showing it in place and operating
- Serial numbers for anything with one, especially inverters, controllers and batteries
- A running total, updated whenever something is added
03
Scheduled Personal Property Versus an Agreed Value Endorsement
These are different instruments and owners conflate them constantly. Scheduling personal property means listing specific items with stated values so they are covered individually, usually above what the base personal effects limit would pay. An agreed value endorsement addresses the vehicle itself, setting a figure the carrier agrees to pay for a total loss rather than computing depreciated market value at the time of loss.
For a heavily built van or a custom coach, the useful combination is often an agreed value figure on the unit that reflects the build, plus scheduling for high-value removable equipment. Getting there requires giving the carrier your documentation up front, which is exactly the inventory described above. Underwriting will ask for photographs and receipts, and the owners who have them get the endorsement issued in a week rather than a month.
Ask the agent to send you the endorsement wording after it is bound and read what it actually says. Verbal assurances from an agent are not a coverage grant.
04
Solar Arrays and Lithium Banks Carry Their Own Problem
Solar and lithium are the two systems most likely to be underpaid, for two different reasons. Panels are frequently damaged in a way that is easy to miss and easy to dismiss: hail in Apple Valley or Hesperia can crack cells under the glass with no visible surface damage, and output loss is only provable with a measured test. Get the panels tested and get the numbers in the file, because a visual inspection will find nothing.
Lithium is the opposite problem. The battery bank is expensive, it is often owner assembled, and it frequently has no single receipt because cells, a battery management system, busbars and a case were bought separately across a year. If your bank was built rather than bought, the inventory has to itemize the components with dates or the carrier prices it against the cheapest drop-in replacement it can find online.
The controller, inverter and wiring are separate line items and should be listed that way. A hit that takes out an array frequently takes the charge controller with it through the DC side, and a bundled line item makes that impossible to claim cleanly.
05
Lifts, Bumpers and Racks Have a Structural Argument Attached
Heavy exterior equipment is not just a value question. A steel front bumper, a rear carrier loaded with a spare and fuel cans, or a lift kit changes the load path the frame was designed around, and after an impact those changes matter to the repair scope. Documenting the modification is how the reinforcement work that goes with it ends up in an approved estimate instead of being written off as an upgrade.
The distinction the carrier will draw is between restoring the vehicle to its pre-loss condition, which includes the equipment that was on it, and improving the vehicle, which is your expense. That line is drawn on evidence. A photographed, dated, receipted rack that was on the unit at the time of loss is restoration. An undocumented rack is an argument, and arguments lose to file documents.
06
Interior Build-Outs and the Builder Who Is Out of Business
Custom interiors are the hardest category to value and the most common place we see owners short-changed. A cabinetry package, a countertop, a fixed bed platform and a galley built by a shop in Chino five years ago has no catalog price. If that shop is gone, and small conversion shops close constantly, then the invoice you kept is the only remaining evidence of what the work cost.
Where no invoice exists, the substitute is a documented rebuild cost: the hours a shop would need to reproduce the work at a stated labor rate, plus materials. That is a defensible construction of value and it is something we can produce as part of an estimate. It is also considerably less persuasive than a receipt, which is why the receipt matters more than owners think at the time they get it.
Photograph the build in progress if you are doing it yourself. Framing photographs before the panels go on establish what is behind a finished surface, and that is precisely what nobody can prove after a fire or a water loss.
07
What We Photograph and Itemize During Disassembly
When a modified unit comes apart here, the modifications get their own documentation set separate from the damage documentation. Every aftermarket item in the affected area is photographed in place before removal, itemized with whatever identifying information is visible on it, and listed on the supplement as a distinct line rather than folded into a general reassembly allowance. Items folded into a general allowance get valued at nothing.
This is one of the most common reasons a supplement moves. An adjuster working from a first estimate has no idea there is a $4,200 induction galley and a custom electrical panel behind the wall that has to come out and go back in. Once photographs of it are in the file with removal and reinstall time attached, that work becomes a priced line item instead of an assumption.
- Every aftermarket item in or adjacent to the damage zone, photographed in place before removal
- Model and serial numbers off inverters, controllers, batteries, generators and roof units
- Wiring runs, conduit paths and penetration points exposed during disassembly
- Mounting method and backing structure behind racks, bumpers and roof-mounted equipment
- Condition of each item before it comes off, so post-repair disputes have a reference
- Removal, protection and reinstall hours itemized separately from the covered damage
FAQ
Questions
Frequently asked questions
Does my RV insurance cover aftermarket solar and lithium batteries?
Only if the policy accounts for them. Base RV policies value the unit as delivered from the manufacturer and carry a modest personal effects limit. Solar arrays, lithium banks, inverters and controllers usually need to be declared and either scheduled or reflected in an agreed value figure. Call your agent, send documentation, and get the endorsement wording in writing once it is bound.
What if I never kept receipts for my modifications?
You are not out of options, but you are in a weaker position. Bank and credit card statements establish dates and amounts. Photographs establish that the equipment existed and was installed. Where nothing survives, a documented reproduction cost built from shop hours and materials is a defensible substitute. Expect more negotiation and a lower result than a receipted item would produce.
Will declaring modifications raise my premium?
Usually yes, modestly, because you are increasing the insured value. That is the trade. The alternative is paying premium on a base unit and discovering at total loss that the settlement reflects a base unit. Owners with large builds routinely find the premium difference to be a small fraction of the coverage gap it closes.
Is a lift kit or a custom bumper covered after a collision?
When it is documented as being on the vehicle at the time of loss, generally yes, since restoring pre-loss condition includes the equipment that was there. Undocumented equipment tends to be treated as an upgrade and excluded. Heavy exterior equipment also changes the load path, so its documentation matters to the structural repair scope, not only to the dollar value.
How do I value a custom interior build for insurance?
Start with the original invoice if the builder is still reachable. If not, value it as reproduction cost: the labor hours a shop would need to rebuild it at a stated rate, plus materials. We can produce that figure as part of an estimate. In-progress framing photographs help enormously, because they prove what exists behind finished surfaces.
Note
Where the work happens
Location: All work is performed at our Yorba Linda facility. We do not offer mobile, roadside, or fleet route service.
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