Forty-eight volts, zero drama.
Five steps to a clean 24–48V feed. The Power-5HV ships with its 1808 fuses, connectors and standoffs in the box, and the input fusing is already built in. You bring a 48V class power supply, decent copper and about half an hour.
Mount the board
Stand the Power-5HV on its included M3 standoffs, never flat against a surface. Footprint, 30 mm height and hole positions match every other powerboard, so it drops straight into an existing Dig-Octa stack. All four M3 corners are ground.
Mind one stacking nuance: the output ports stay reachable under another board, but the flat 1808 fuse sockets do not, unlike the Power-5's upright ATO sockets. If fuse swaps should stay easy, keep the 5HV as the top powerboard or plan access. And wire the three inputs before anything gets stacked above them.
Mixed stacks are fine. The Power-5HV is compatible with all other Dig-Octa hardware, so 48V pucks and 12V strip can live in one tower on separate powerboards.
Wire the PSU inputs
The Power-5HV accepts 24 to 48V only; 5V and 12V LEDs belong on the other powerboards. Connect one supply to all three barrier inputs with 16 AWG minimum, and treat 12 AWG as the sweet spot. Each input passes 10A at most, so the full 30A needs all three wired.
Input fusing is onboard and fixed: auto-reset PTC fuses at 10A per input (internally two 5A PTCs each). Nothing to buy, install or forget. Terminate in SV5.5-4 fork crimps or ferrules, same as the other powerboards.
One power supply per powerboard, never two. Paralleled supplies load-share unpredictably and can create a dangerous situation. One big PSU feeding several powerboards is fine.
Choose fuses per run
Outputs use the SMD 1808 fuse, chosen because common ATO blade fuses are only rated to 32V and this board runs 48. The box includes 12x 5A, and the sockets accept 10A at most.
Fuse low, on purpose. 10A at 48V is 480W through one cable, far more than most runs need, which is exactly why only 5A fuses ship with the board. Match each fuse to its wire; lower is always fine and encouraged, larger than the maximum voids the warranty. Replacements are listed on the 48V fuse page.
The feed rule still applies at high voltage: a front feed carries about 4A, a middle injection about 8A. Interleave heavy and light runs across the board, and map the feeds with the ultimate power injection guide.
Land the LED power runs
Wire each LED run to a 5.08 mm pluggable connector at the bench, cable up to 14 AWG with a ferrule, then power the system down and click the connectors in. These ports carry power only: every run's data wire goes to the brainboard's LED terminals, while power and ground stay on the powerboard.
Do not hot-plug under power. It was never supported, and 48V raises the stakes: in testing this about 50 times, roughly 1 in 25 hot-plugs destroyed an output level shifter on the brainboard. Power down, plug, power back up.
Power up and verify
Switch on and read the display: it should show your true 24–48V input including drop over the input cabling. In a mixed-voltage stack the red digits also tell the boards apart at a glance.
Load test at full RGB white. A blown-fuse LED flags any open output fuse, and the board is designed for roughly 25 °C above ambient at its 30A continuous rating. Thirty amps sounds modest until you do the math: 1,440W at 48V.
Keep any PSU at or below 80% of its rating for continuous duty. The official pick is the Mean Well LRS-600-48 (12.5A at 48V) or bigger, and a lower-current supply is no problem at all; the full shortlist lives in the power supply recommendations.
Your brainboard never sees 48V. The 5HV down-converts QPowerPost to about 15V, and its spare brainboard feed terminal supplies the same 15V at up to 1A.
Answers are one click away.
The Power-5HV FAQ covers the questions that actually come up: which LEDs need 24–48V, 1808 fuse sourcing, the silkscreen bug, hot-plug rules. For everything else there's a Discord full of people who built this before you.