How long will a Goal Zero Yeti PRO 4000 run LED Christmas tree lights (500 bulbs)?
About 2.3 days — 2 days 7 h typically, from 2 days 4 h in the worst case to 2 days 10 h at best. That assumes LED Christmas tree lights (500 bulbs) pulling 35 W continuously, plus the station's 18 W AC mains socket overhead — 53 W in total out of 2,902 usable watt-hours.
Note how much of that draw is the station rather than the appliance: 34% of the energy goes on keeping the inverter awake. On a load this small, the idle draw matters more than the capacity does.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × LED Christmas tree lights (500 bulbs), UK 230 V | 53 W | 2 days 4 h | 2 days 7 h | 2 days 10 h |
| 2 × LED Christmas tree lights (500 bulbs), UK 230 V | 88 W | 31 h 2 min | 32 h 59 min | 34 h 55 min |
| 1 × LED Christmas tree lights (500 bulbs), US 120 V | 53 W | 2 days 4 h | 2 days 7 h | 2 days 10 h |
- 6.8 nights of eight hours, or 2.28 days of continuous running.
- Usable energy: 2,902 Wh of the 3,993 Wh on the box, after chemistry, inverter losses and the reserve.
- To keep it going for a full 24 hours you would need about 1,750 Wh of rated capacity — which this station has.
- Start-up: the LED Christmas tree lights (500 bulbs) asks for 35 W at switch-on against this station's 7,200 W peak — comfortable.
Buy the Goal Zero Yeti PRO 4000
Where to buy
Amazon and approved-programme links are affiliate links; the site may earn a commission at no extra cost to you. Links marked “official site” are untracked. Prices and stock change constantly — check before you buy.
What changes the answer
| If instead… | Typical runtime | Change |
|---|---|---|
| The pack is two years old | 2 days 2 h | -8% |
| The pack is five years old | 43 h 48 min | -20% |
| It is −10 °C outside | 46 h 32 min | -15% |
| You run it flat, no reserve | 2 days 13 h | +11% |
| You keep 20% back | 2 days 1 h | -11% |
About a sixth of the same tree in old incandescent bulbs, and cool enough to touch.
If you need it to run longer
Nothing in this catalogue runs LED Christmas tree lights (500 bulbs) for twice as long as the Goal Zero Yeti PRO 4000. Either it is already near the top of the range, or this appliance is beyond what portable batteries do well — see the LED Christmas tree lights (500 bulbs) page for the full ranking.
Smaller options that still work
| Station | Wh | Typical | Weight | Indicative price |
|---|---|---|---|---|
| Anker SOLIX F3800 | 3,840 | 2 days 5 h | 60 kg | £2,999 / $3,499 |
| EcoFlow DELTA Pro | 3,600 | 2 days 1 h | 45 kg | £2,499 / $2,699 |
| Anker SOLIX F3000 | 3,072 | 43 h 47 min | 41.5 kg | £1,899 / $1,999 |
| Pecron E3600LFP | 3,072 | 43 h 47 min | 36 kg | — / $999 |
Did this match what you measured?
Nothing is sent anywhere unless analytics is switched on, and no text is collected.