The BIGTREETECH Relay V1.2 is the kind of small upgrade that makes more sense after you have lived with longer prints, late-night finishes, and a bench full of machines that do not always need to stay powered after the job is done. It is not glamorous, but it has a real operator-minded buyer case.
The current Amazon listing shows 4.2 out of 5 stars from 52 global ratings, which is enough visible buyer signal to treat this as a real power-management accessory instead of random mod-bin clutter.
What this product is really for
This module is built for printers where automatic power-down after a finished job is genuinely useful. That can mean reducing needless idle time, cutting down on fans and lights staying on overnight, or pairing a machine with a more deliberate shutdown workflow instead of relying on someone to remember to walk back to the bench.
That gives it a different buyer lane from upgrades like the BIGTREETECH Panda PWR, the SKR Mini E3 V3 review, and the BIGTREETECH filament runout sensor review. Relay V1.2 is about what happens after the print ends, not during print control, motion tuning, or filament protection.
Why the buyer case is distinct
GoodPrints3D already covers control boards, power-management gear, runout protection, hotend upgrades, and bench accessories. This module earns its own page because automatic shutdown is a narrower but still meaningful buyer problem. On a busy bench, especially with older Ender-style machines and SKR-based conversions, that end-of-job behavior matters.
It is especially relevant for owners running modified printers in garages, basements, workshops, or side rooms where the machine may finish long before anyone comes back to shut it down manually.
Who this is for
- owners of Ender-class and SKR-based printers who want cleaner end-of-print power behavior
- modders already comfortable adding boards, wiring accessories, and firmware-aware upgrades
- people who run overnight or workday prints and do not want a machine idling longer than needed
- bench operators building a more intentional printer power workflow without jumping straight to a larger smart-power stack
Who should skip it
- buyers who are not comfortable with install complexity, wiring, or compatibility checks
- printer owners whose machine already has a power-management setup they trust
- absolute beginners still sorting out first layers, extrusion, or basic machine reliability
- people expecting this module to solve safety questions that really call for broader electrical review and good printer supervision habits
What looks strong
- clear use case for automatic shutdown after completed prints
- fits well with SKR, Octopus, Manta, and Ender-class upgrade ecosystems that GoodPrints readers already care about
- distinct enough from Panda PWR because this is a simpler after-print shutdown lane rather than a broader remote-control and energy-monitoring lane
- useful for operators who value cleaner bench habits and lower idle-time waste
Tradeoffs to keep in mind
- the value depends heavily on your willingness to install and configure it correctly
- this is not the first upgrade most casual printer owners should buy
- it makes more sense on modded or semi-custom machines than on printers with polished built-in power workflows
- buyers still need sound electrical judgment and should not treat any shutdown module as a substitute for common-sense oversight
Where it earns its keep
The clearest buyer case is the printer that keeps finishing jobs at awkward times. If you are running longer prints while you sleep or while you are away from the bench, idle fans and powered electronics can feel wasteful. This module is aimed squarely at that irritation.
If your bigger problem is smarter remote control, the Panda PWR review is the better lane. If your machine still needs a more capable board first, start with the Manta M4P V2.2 review or the SKR Mini E3 V3 review. Relay V1.2 earns attention once the machine is already reliable enough that power-down polish becomes worth chasing.
Editorial take
This is a solid affiliate-review candidate because it addresses a real workflow problem for printer owners who already live in the upgrade-heavy BIGTREETECH ecosystem. It is not a universal must-buy, but it is easy to justify for the right machine, the right operator, and the right print schedule.
Should you buy it?
Buy it if you run supported boards, you are comfortable with install work, and you want cleaner automatic shutdown behavior after finished prints. Skip it if you need beginner-friendly gains first or if your current power workflow is already doing the job well enough.
Affiliate link: Check the BIGTREETECH Relay V1.2 on Amazon.
Frequently Asked Questions
Is this the same kind of product as a smart plug?
Not really. The overlap is power control, but this module is aimed at printer-integrated shutdown behavior rather than a generic wall-outlet automation approach.
Does this make sense for stock beginner printers?
Usually not as a first upgrade. It makes more sense once the machine is already stable and the owner is comfortable adding electronics-focused upgrades.
Is it better than Panda PWR?
They serve different buyer cases. Panda PWR is a broader power-management and remote-control product, while Relay V1.2 is a narrower automatic-shutdown module for supported board ecosystems.