We didn't build another solar panel—we solved the biggest reasons trailer batteries die.
Most trailer owners don't realize their battery is being slowly drained every day by wireless remotes, hydraulic power units, breakaway systems, control modules, and natural battery self-discharge. We designed this system specifically to fight those problems.
1. Bigger Really Is Better
Most trailer solar panels are only 3W, 5W, 7W or 12W.
Those numbers sound fine until you remember:
Panels are mounted flat.
They never point directly at the sun.
Weather affects output.
Dirt affects output.
Shade affects output.
By the time you factor in real-world losses, those tiny panels simply don't produce enough energy to stay ahead of parasitic loads.
Our philosophy:
If your dump trailer toolbox has room for a larger panel, use it.
Capture more sunlight.
Make more power.
Keep the battery healthier.
2. We Designed It For Reality
Lab ratings don't matter.
Real trailers:
Sit outside
Sit inside barns
Sit under trees
Sit for weeks
Sit all winter
Our goal wasn't to advertise the biggest wattage.
Our goal was to build something that actually works in the conditions customers use every day.
3. The Hidden Battery Killer
Most people think the battery dies because they forgot to charge it.
Often that's not true.
Today's trailers have:
wireless remotes
hydraulic controllers
breakaway systems
battery self-discharge
All of those slowly pull the battery down.
Solar helps offset those losses.
4. One Feature Almost Nobody Talks About
This is probably the biggest engineering feature.
Many charge controllers continue consuming power even when the panel isn't producing power.
That means:
Trailer parked in a barn...
No sunlight...
Charge controller still awake...
Battery slowly drains.
We specifically chose a controller that does not create parasitic draw when there is no sunlight.
If there's no sun...
the controller essentially goes to sleep.
No glowing LEDs.
No unnecessary battery drain.
That's something most companies never mention.
5. We Sized It Correctly
People focus on wattage.
We focused on usable charging.
Our 25W system typically provides around:
1.5–2 amps
under good conditions.
That's enough to continuously maintain batteries and even recover from light discharge over time.
6. Works With Both Battery Types
Perfect for
Lead Acid
AGM
Lithium
One solution regardless of what battery the customer owns.
7. It's Not Just Maintenance
The goal isn't only preventing dead batteries.
It's also:
extending battery life
reducing sulfation
keeping batteries topped off
reducing downtime
having the trailer ready when needed
Things Customers Don't Think About
Did you know...
Your battery is slowly losing power even if NOTHING is connected?
Lead acid batteries naturally self-discharge.
Temperature changes accelerate it.
That's why maintenance charging matters.
Did you know...
Flat-mounted solar panels rarely produce their advertised wattage?
Real-world conditions reduce output significantly.
That's why we chose a larger panel.
Did you know...
A cheap charge controller can actually drain your battery when there's no sunlight?
Ours was specifically selected to avoid that.
Keep Your Trailer Ready to Work
A dead battery rarely happens overnight. It's usually the result of weeks or months of small, unnoticed power losses.
Choosing the right solar maintenance system can help offset parasitic loads, reduce battery wear, and keep your trailer ready when you need it—not after you've searched for a charger or replaced another battery.
If you're looking for a solar solution that's designed for real-world trailer use—not just laboratory specifications—Primary Mover is here to help.
Explore our trailer solar battery kits or contact our team to find the right solution for your equipment.