BLUETTI AC50B vs BLUETTI AC50P
BLUETTI AC50B
BLUETTI AC50PThe AC50P holds 12% more energy, and that is the gap worth deciding on: it runs longer between charges. They are level on AC output, weight and wall recharge time. Scored across this catalogue they land at 5.0 and 5.2 out of 10.
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BLUETTI AC50PIt leads by 12% on capacity. That is the combination most people are actually choosing between.
Check price on AmazonBLUETTI AC50BIt gives up ground on every axis large enough to measure, so take it only if it is clearly cheaper on the day or you already own the accessories.
Check price on AmazonThe specifications side by side
| Specification | AC50B | AC50P |
|---|---|---|
| Score | 5.0/10 | 5.2/10 |
| Capacity | 448 Wh | 504 Wh |
| AC output | 700 W | 700 W |
| Surge | 1,000 W (Lifting Power) | 1,200 W (Lifting Power) |
| Cell chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 cycles to 80% | 3,000 cycles to 80% |
| Wall recharge | 1.2 hours | 1.3 hours |
| Max solar input | 200 W | 200 W |
| UPS switchover | 20 ms | 20 ms |
| Weight | 14.8 lb (6.7 kg) | 15.1 lb (6.9 kg) |
| Extra batteries | Not expandable | Not expandable |
The rows worth your attention are the ones where the gap is large enough to change a decision. On this pair that means capacity. Everything else is close enough to ignore.
Where they really separate: capacity
This is the one gap large enough to decide the question. The AC50P comes out 12% ahead on capacity, and the reason that matters is practical rather than arithmetic.
Capacity sets how long a unit runs something, not what it can run. A larger pack behind the same inverter buys hours, not new appliances.
What each one will run
Same arithmetic for both: usable watt hours after an assumed 85% inverter efficiency, divided by average draw rather than peak.
BLUETTI AC50B
| Appliance | Typical draw | Estimated run time |
|---|---|---|
| Fridge | 120 W | 9 h 4 min |
| CPAP machine | 45 W | 8 h 28 min |
| Router and modem | 15 W | 25 h 23 min |
| Television | 90 W | 4 h 14 min |
| Microwave | 1200 W | 0 h 19 min |
BLUETTI AC50P
| Appliance | Typical draw | Estimated run time |
|---|---|---|
| Fridge | 120 W | 10 h 12 min |
| CPAP machine | 45 W | 9 h 31 min |
| Router and modem | 15 W | 28 h 34 min |
| Television | 90 W | 4 h 46 min |
| Microwave | 1200 W | 0 h 21 min |
For your own appliance and its real wattage, the run time calculator shows the assumptions on screen and lets you move them.
Common questions
Is the AC50B or the AC50P better value?
This site does not print prices, because a stale price is worse than none. Check both on Amazon, then weigh the gap against the differences above. A 12% lead on capacity is worth paying for only if that axis matters to your use.
Can I compare their surge ratings directly?
Not always. BLUETTI's Lifting Power and EcoFlow's X-Boost run appliances above rated output by lowering voltage, which suits a kettle or a heater but not a motor or a computer. A conventional surge rating means something else: a brief tolerance for start-up current. The table keeps each maker's own label attached.
Is the newer one simply a better version?
Not automatically. Makers revise units to hit a different price or size, and a newer model sometimes drops something the older one had. Read the table rather than the generation number.