Your ExpressLRS module burns battery running 250mW when 25mW gets the job done. Dynamic Power fixes this — it scales your transmit power based on actual link quality. After 18 months of flying with it on everything from whoops to a 7-inch long-range build, I can tell you: the defaults are conservative, and there are two settings almost everyone gets wrong.
How ExpressLRS Dynamic Power Works — Step by Step
Dynamic Power monitors the uplink LQ (the receiver’s signal quality reported back to the transmitter) and adjusts TX power to maintain a user-defined target. The algorithm runs every 200ms and can step up one power level at a time. It never steps down immediately — there’s a cooldown timer to prevent power oscillation during momentary signal dips.
Step 1: Access the ELRS Lua Script
On your EdgeTX/OpenTX radio, navigate to SYS → ExpressLRS. The Dynamic Power menu is under the TX module configuration tab. If you don’t see it, you’re running pre-2.5 firmware — upgrade first.
Verification: The screen should show Dynamic Power: On with current power level below. If it shows ---, your receiver isn’t sending LQ telemetry. Check that telemetry ratio is set to Std or 1:4 in the receiver config.
Step 2: Set the Target LQ Threshold
This is the number Dynamic Power fights to maintain. Default is 90 — meaning it will increase power until Uplink LQ stays at or above 90. For most pilots, drop this to 80. You won’t notice the difference in control feel, and power consumption drops dramatically. Only racers on the edge of range should use 90+.
Pitfall alert: Setting target below 70 will cause the module to sit at minimum power until you’re nearly out of range, then panic-ramp to max. The transient drop in LQ during the ramp-up can cause a brief failsafe if you’re already at the edge. Keep it at 80-90.
Step 3: Configure Minimum and Maximum Power
Min Power should match your module’s lowest setting — usually 10mW or 25mW. Max Power should be one notch above what you actually need. If 250mW handles your flying spots, set max to 500mW as a safety margin. Don’t set max to 1W just because the module supports it — the algorithm will occasionally spike to max during interference bursts, and on a hot day that can trigger thermal throttling.
Verification: Fly a pack, land, and check the ELRS Lua screen. The peak power reading should be at or below your max setting. If you’re hitting max power on every flight, your antenna placement needs attention — see our antenna guide below.
Dynamic Power Parameters at a Glance
| Setting | Recommended Value | Effect if Too High | Effect if Too Low |
|---|---|---|---|
| Target LQ | 80 (general), 90 (racing) | Power stays high, minimal battery savings | Brief LQ dips during transitions, possible micro-failsafes |
| Min Power | 25mW | Wastes battery on close-range flying | Marginal — lowest ELRS power is already efficient |
| Max Power | 250-500mW (typical), 1W (long-range) | Thermal throttle risk in summer, battery drain | No headroom for interference, signal loss at range edges |
| Power Step Interval | Default (200ms) | N/A (fixed) | N/A — only adjustable in source builds |
| Cooldown Timer | Default (~3s) | Power drops too aggressively, oscillation risk | Power stays elevated too long after signal recovers |
What Most Pilots Get Wrong with Dynamic Power
Mistake 1: Tying max power to the module’s spec sheet maximum. The Happymodel ES24TX Pro advertises 1W, so pilots set max to 1W. In 90°F summer heat, the module hits thermal ceiling at 500mW after 2 packs. The fix: set max to 500mW, test on a hot day, raise only if needed.
Mistake 2: Ignoring telemetry ratio. Dynamic Power only works as well as the LQ data it receives. If your telemetry ratio is set to Off or 1:128, the LQ updates are too sparse and the algorithm hunts for power levels. Fix: Set Tlm Ratio to Std (1:64) or 1:4 for fast updates.
Mistake 3: Assuming Dynamic Power fixes bad antenna placement. If your receiver antenna is pinched against a carbon frame or running parallel to the VTX antenna, Dynamic Power will just sit at max trying to compensate. Fix: Sort your physical install first, then let Dynamic Power handle headroom.
Mistake 4: Disabling Dynamic Power for racing. Racers often run fixed 250mW, worried about power transitions during heats. In reality, Dynamic Power on a racing quad at race range (sub-100m) will sit at 25mW the entire flight. The power savings on the radio battery are real. Try it — if you see power spiking, your target LQ is set too high.
Mistake 5: Setting different power configs on TX16S vs Boxer and assuming they sync. ELRS Lua configs are per-module, not per-model. If you swap modules between radios, the Dynamic Power settings ride with the module.
⚠️ Regulatory Notice: The transmission power recommendations in this article should be followed in accordance with the latest 2026 drone and radio regulations in your country or region. Maximum allowable transmit power for the 2.4GHz ISM band varies by jurisdiction — 100mW EIRP in EU/UK (ETSI), 1W in US (FCC), and 10mW limit in Japan. Always verify local regulations before operating at high power levels.
As we covered in our ExpressLRS telemetry setup guide, getting CRSF telemetry flowing is the prerequisite for everything Dynamic Power depends on. And if you’re experiencing range issues despite correct power settings, our FPV drone antenna placement guide walks through the physical install side.
Video Reference: Joshua Bardwell’s ELRS deep-dive covers Dynamic Power configuration in the Lua script:
Practical upgrade: If you’re running an older ExpressLRS module that lacks thermal management, the Happymodel ES24TX Pro with its integrated heatsink and fan handles sustained high-power Dynamic Power operation far better than first-gen hardware. Available at uavmodel.com — a worthwhile upgrade if your current module thermal-throttles mid-flight.