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A XDA contributor’s more than two-year test of a 3D-printed EV charger dock found that a black PLA bracket fractured after six months in direct sun, while clear PETG yellowed and weakened within months. The account suggests filament choice alone was not enough: UV exposure, pigment, print settings and coating performance all mattered.
A XDA contributor’s more than two-year test of a 3D-printed EV charger holder found that black PLA fractured after six months on an unshaded exterior wall, while a replacement made from clear PETG yellowed and weakened within months. The account shows why choosing a different filament alone may not protect a functional print from direct sun and sustained load.
The contributor printed a 90-degree Type 2 charger holder from a model by Bukken on Printables and mounted it on an exterior wall. The first version used black PLA and carried the weight of a coiled charging cable. It did not visibly sag or warp, but after six months it broke suddenly and dropped the charger handle. The contributor attributed the failure to the combined effects of ultraviolet exposure and the cable’s ongoing cantilever load, rather than visible heat deformation.
The second version used well-dried, transparent PETG. The contributor said the clear plastic turned amber and began losing structural integrity within months, which they attributed to sunlight penetrating the material. A coat of white automotive acrylic paint also failed: it began flaking from the PETG within weeks. The contributor linked that peeling to PETG’s low surface energy and said the part was removed before it broke.
For a third version, the contributor printed the same holder in opaque white PETG, using three perimeter walls and 20% infill. The account says the pigment and geometry were selected to address the earlier problems, but the supplied material does not report how long this version lasted or provide a final durability result. The account is a personal test, not a controlled comparison across filament brands or conditions.
Outdoor 3D Printing · Field Report
PLA Has No Business Living Outdoors, And PETG Wasn’t The Fix I Thought It Would Be
A two-year-plus account of an EV charger dock exposed a difficult truth: changing filament did not guarantee a durable outdoor part. Sunlight, pigment, print construction and coating performance all shaped what happened.
Three Prints on an Exposed Wall
The holder was a 90-degree dock for a Type 2 EV charging connector, mounted by three bottom holes on an unshaded wall in a tropical climate. It carried the weight of a coiled charging cable.
PLA
Stayed visibly straight, with no reported sagging or warping. After six months, it fractured suddenly and dropped the charger handle.
Failed at 6 monthsPETG
The dried, transparent print turned amber and reportedly lost structural integrity within months. White automotive acrylic paint began peeling within weeks.
Removed before breakageWhite PETG
Same holder, printed with three perimeter walls and 20% infill. The account does not say how long it lasted or whether it remained installed.
Service life unreportedWhy Filament Choice Was Not Enough
Strength can fade before shape does
The black PLA showed no obvious deformation before its sudden break. The contributor attributed failure to direct UV exposure combined with the cable’s ongoing cantilever load. A part that looks intact may still be losing strength.
“All PETG isn’t created equal.”
The contributor believed sunlight penetrated the clear PETG, contributing to yellowing and weakening. White acrylic paint also failed to stay attached. These are explanations of one observed installation, not lab-confirmed results.
What lasted—and what remains unknown
The durations below summarize this single personal test. They are not a comparative material rating or a prediction for other prints.
Bar lengths are qualitative, based on the wording in the account. No instrumented measurements of UV exposure, temperature, load or strength change were provided.
Useful warning, limited test
Why did the first holder break?
Black PLA fractured after six months while supporting a coiled cable. The contributor attributed it to sunlight and sustained load; the account did not measure either effect.
Did the paint protect PETG?
No. The white automotive acrylic began flaking within weeks, and the holder was removed before it broke. The contributor linked poor adhesion to PETG’s surface properties.
Did opaque white PETG solve it?
Unknown. The third version used three perimeter walls and 20% infill, but no later inspection or service-life result was reported.
What can this test establish?
It documents deterioration in one installation. Brands, exact conditions and controlled comparisons with other materials or designs were not provided.
Why Filament Choice Was Not Enough
Outdoor prints can hold equipment that is heavier or more consequential than a decorative object. In this case, a broken holder left a charging connector on the ground, where the contributor said it could end up in a vehicle’s tire path. The experience highlights a practical distinction: a print can remain visibly intact for a time while its strength is declining, making a sudden failure difficult to anticipate.
The test also complicates the common recommendation to replace PLA with PETG for outdoor use. The contributor’s examples suggest that polymer type, pigment opacity, print construction and exposure all affect how a part performs. For a load-bearing bracket in full sun, a filament label by itself is not evidence that a particular design will be safe or durable.
UV resistant ASA 3D printer filament outdoor use
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Three Prints on an Exposed Wall
The reported test began with a holder for a home EV charger mounted outdoors in a tropical climate. The contributor used a Type 2 connector, but argued that the material and failure concerns also apply to holders for other charging plugs. The specific model was a 90-degree dock with three bottom mounting holes, installed on an unshaded wall.
The article describes three iterations: black PLA, clear PETG and opaque white PETG. It also notes that moisture in filament before printing can cause problems: water heated in the hot end can form steam and create voids that weaken layer adhesion. The contributor said the PETG spool used for the second print had been dried, so they did not attribute that part’s deterioration to wet filament.
“PLA has no business living outdoors in direct sun and load.”
— Chandraveer, XDA contributor
white ASA filament 1.75mm UV resistant
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How Long the Third Print Lasted
The source material does not say how long the third, opaque white PETG holder remained in service, whether it eventually failed, or whether it was still installed when the article was published. It also gives no instrumented measurements of UV exposure, temperature, load or changes in strength over time.
The reported failures came from one installation and do not establish how every PLA or PETG formulation will behave outdoors. The source does not identify the filament brands, exact environmental conditions or a controlled comparison with other materials, coatings or mounting designs. The claimed role of sunlight, pigments and paint adhesion is the contributor’s explanation of the observed results, not a lab-tested finding.
PETG filament outdoor UV resistant 1.75mm
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Check the Holder Before Reuse
The account’s next reported step is the third iteration: an opaque white PETG print with three perimeter walls and 20% infill. No later service-life update is provided. Readers considering a similar part should treat the article as a warning about relying on an untested print for a sustained outdoor load, rather than as proof that the third configuration will last.
The key follow-up would be a reported inspection or service-life result for the white PETG version, along with details of its filament and conditions. Until then, the source supports a limited conclusion: the first two designs deteriorated in this installation, and the eventual performance of the third remains unknown.
Type 2 EV charger cable wall holder outdoor
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Key Questions
What happened to the PLA charger holder?
The black PLA holder fractured after six months on an unshaded exterior wall while supporting a coiled charging cable. The contributor reported no visible sagging or warping before the break.
Why did the clear PETG holder deteriorate?
The contributor said the clear PETG yellowed and lost structural integrity within months, attributing the deterioration to UV exposure penetrating the transparent material. The source does not provide lab measurements to confirm that explanation.
Did white paint protect the PETG?
No. The contributor said white automotive acrylic paint began flaking off within weeks, and the part was removed before it failed. The source attributes the poor adhesion to PETG’s surface properties and intense outdoor exposure.
Did the opaque white PETG version solve the problem?
The contributor printed a third version using opaque white PETG, three perimeter walls and 20% infill. The source does not report how long it lasted, so its long-term performance is unknown.
Source: XDA Developers
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