Proper Garage Co. — Storage Guides
How to Store a Car Long Term: The Complete Guide
Dead batteries, rodent damage, and ruined paint are common — and completely preventable. Here's exactly what to do before you walk away from your vehicle for the season.
Why Long-Term Car Storage Goes Wrong
Most people underestimate what happens to a car that sits for two, three, or six months. It seems like nothing should go wrong — it's not moving, nothing is wearing out. But that assumption leads to dead batteries, rodents nested in the engine bay, flat spots on tires, and a paint job covered in grime that has had months to etch in.
The good news: every one of these problems is preventable with a little prep before you park it. This guide covers the full checklist so you can store a car long term and wake it up in spring exactly how you left it.
The short version: Before you store, you need to handle the battery, the rodents, and the paint. Everything else is secondary. The Proper Garage Co. Vehicle Storage Kit ($37.97) handles all three in a single purchase.
Step 1: Deal With the Battery
A parked car still draws power. Alarm systems, clocks, computers, and various sensors create what's called parasitic drain — a slow, continuous pull on your battery that can kill it in as little as four to eight weeks. Older batteries may go dead in less time.
You have two reliable options for preventing this:
- Battery tender (trickle charger): Keeps the battery at full charge continuously. Requires an electrical outlet near the vehicle.
- Quick-release battery terminal disconnect: Physically cuts the connection between the battery and the car's electrical system. No outlet required. Works anywhere.
If you're storing in a garage with power nearby, either option works. If you're in a storage unit, a barn, or any space without an outlet, the quick-release disconnect is the practical choice.
Quick Release Battery Terminals
Flip a lever to disconnect — no tools, no outlet. Prevents parasitic drain anywhere you park it.
Step 2: Protect Against Rodents
Rodents — mice and rats especially — seek out parked vehicles for warmth and nesting material, particularly during colder months. They get into engine bays, chew through wiring harnesses, nest in air filters and behind dashboards, and gnaw on insulation and upholstery. Repair bills range from a few hundred to several thousand dollars depending on what they get into.
The most practical prevention strategy for stored vehicles is scent-based deterrence. Rodent repellent pouches placed in the engine bay, cabin, and trunk create an environment rodents don't want to enter — without traps, poison, or ongoing maintenance.
- Place 1–2 pouches in the engine bay
- Place 1–2 pouches in the cabin (under seats works well)
- Place 1–2 pouches in the trunk or cargo area
Rodent Repellent Pouches (10-Pack)
Natural scent deterrent for engine bay, cabin, and trunk. 10 pouches covers one vehicle thoroughly.
Step 3: Cover the Paint
Even inside a garage or storage unit, dust, grit, and debris settle on your paint over months. Left long enough, fine particles can cause micro-scratches and dull your finish. A quality car cover creates a breathable barrier that keeps the surface clean without trapping moisture underneath.
For indoor storage, you don't need a heavy, weather-resistant cover — a lightweight cover is actually preferable because it's easier to put on and take off and less likely to trap condensation. Key things to look for: non-abrasive lining, breathable fabric, and the right fit for your vehicle's length.
Cover sizes for the Proper Garage Co. Lightweight Indoor Car Cover:
- Small: Miata, Subaru BRZ, Honda Civic and similar
- Medium: Ford Mustang, Dodge Charger, BMW M3 and similar
- Large: Trucks, SUVs, full-size classics
- X-Large: Full-size pickup trucks
Step 4: Fluid and Tire Considerations
These steps are outside the scope of what a storage kit handles, but they're worth doing before a long storage period.
Fuel and fluids
For storage beyond 30 days, consider adding a fuel stabilizer to prevent the gas from degrading and gumming up fuel lines or the carburetor. Change the oil beforehand if it's due — used oil contains acids and contaminants that can damage engine internals over months of sitting.
Coolant and brake fluid
Both are hygroscopic (they absorb moisture over time). Check levels and condition before storage, especially if you haven't flushed them recently.
Tires
Tires that sit under the car's weight in one position for months can develop flat spots — particularly in cold temperatures. Keep tires inflated to the manufacturer's recommended pressure. For storage longer than 3 months, consider moving the car a few feet every few weeks, or using tire cradles to distribute the weight.
The Simple Kit That Handles the Big Three
If you want to handle the battery, rodents, and paint protection in one shot without sourcing three separate products, the Proper Garage Co. Vehicle Storage Kit is built for exactly that. For $37.97, it includes the car cover, quick-release battery terminals, and a 10-pack of rodent repellent pouches.
No outlet needed, no complex setup. Three steps and you're done:
- Drop 1–2 rodent pouches in the engine bay, cabin, and trunk
- Install the quick-release terminals and disconnect the battery
- Slide the car cover on and walk away
Who This Guide (and Kit) Is For
Long-term storage looks different depending on the situation. These are the three most common scenarios — and how the kit addresses each one.
Stores a car, RV, or boat from fall through spring
Recurring problems: Dead battery every March, rodent damage that's discovered too late, dusty paint from months of sitting uncovered.
"Put it away right, wake it up exactly how I left it. No surprises in spring."
Stores in a facility with no power access
Recurring problems: Battery tender requires an outlet — useless here. Extension cord workarounds that don't actually work. Rodent access that's easier in shared facilities.
"Built for storage units with no power outlet. The disconnect does the job a tender can't."
Stores 2–3 vehicles in a barn or garage
Recurring problems: Managing several separate product purchases every season, rodents that move from one car to another, paint on multiple vehicles all needing protection.
"Bought these for my barn — covers 3 cars per pack. Worth every penny."
Three Problems. One Box.
Long-term storage fails for predictable reasons: a dead battery, a rodent infestation, or paint that spent months under accumulated grit. Each problem has an obvious solution — but buying all three separately costs more and requires three different purchases. The Storage Kit handles them in one.
Everything I need in one box — that's the point. Three separate problems, three separate solutions, one $37.97 purchase. No piecing it together across multiple orders.
Frequently Asked Questions
How long can a car sit before the battery dies?
Most car batteries drain within 4–8 weeks from parasitic draw alone, even with nothing switched on. Modern vehicles with always-on electronics can drain faster. Disconnecting the battery or using a quick-release terminal eliminates this problem entirely.
Do I need a battery tender to store a car long term?
Not necessarily. A battery tender is a great option if you have access to a power outlet. If you're in a storage unit or a garage without power, a quick-release battery terminal disconnect is more practical — no cord, no outlet, no ongoing cost.
How do I keep rodents out of my stored car?
Place rodent repellent pouches in the engine bay, cabin, and trunk. Rodents are drawn to stored vehicles for warmth and nesting. Scent-based pouches deter them before they have a chance to damage wiring or upholstery.
Should I cover my car during long-term storage?
Yes. Even indoors, dust and debris settle on paint over months. A lightweight indoor car cover creates a breathable barrier that keeps your paint clean without trapping moisture underneath.
What happens to tires during long-term storage?
Tires can develop flat spots from sitting in one position under the car's weight. If storing longer than 3 months, move the car occasionally or use tire cradles. Always keep tires inflated to spec before storage.