Product Review · Updated November 2026
OUPES Mega 1 Review: The Budget 1 kWh Station With Room to Grow
The OUPES Mega 1 is a 1,024Wh LiFePO4 power station with a 2,000W inverter (4,500W surge), 800W of solar input and expansion to 5,120Wh with two B2 batteries. For the money, few 1 kWh stations match it on output and expansion, and it is a strong value pick for outages, camping and van trips. The catches: reviewers call its fans loud, it weighs about 27.8 lb, and warranty terms differ between listings. It scores 89/100 in our scoring, a few points behind the big-brand 1 kWh units.
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By OUPES Mega 1 Verdict & Quick Specs
Capacity
1,024
Wh LiFePO4
AC Output
2,000
Watts (4,500W surge)
Solar Input
800
Watts max
Weight
27.8
Lbs
- ✓ Best for: budget outage backup, camping and van trips, buyers who may add a B2 battery later
- ✗ Not for: sleeping next to it, voltage-sensitive gear on surge-heavy loads, or anyone who wants a clear single warranty term
Our editorial rating: 89/100 · Live price: $446.49
Who Should Buy the OUPES Mega 1 (and Who Should Skip It)
Buy it if you…
- ✓ Want the most 1 kWh capacity and output for the money — compare $ per Wh in the table below
- ✓ Need 2,000W for a microwave, coffee maker or power tools
- ✓ Expect to grow into multi-day backup — two B2 batteries take it to 5,120Wh
- ✓ Charge from solar — 800W of input is more than the Jackery and Anker 1 kWh units we compare
- ✓ Want a sub-20 ms UPS switchover for a router or desktop (OUPES figure)
Skip it if you…
- ✗ Will run it in a tent or bedroom — The Solar Lab and Bob Vila both call the fans loud
- ✗ Carry it far — the Jackery Explorer 1000 V2 is about 4.8 lb lighter
- ✗ Run voltage-sensitive electronics alongside motor loads — The Solar Lab found it sags voltage during surges
- ✗ Want a built-in light — it has none (The Solar Lab)
- ✗ Need 240V or whole-home backup — see the OUPES Guardian 6000
OUPES Mega 1 Specs
Core figures come from our product database. The rest are OUPES's published specs, each cross-checked against at least one independent review (sources at the bottom of the page).
| Battery capacity | 1,024 Wh |
| Chemistry / cycle life | LiFePO4, rated 3,500+ cycles to 80% capacity |
| AC output | 2,000 W continuous, 4,500 W surge, pure sine wave, 4 AC outlets |
| USB / DC | 2 × USB-C 100 W PD; 4 × USB-A QC3.0; 12V car socket; 2 × 12V DC barrel (13 ports total) |
| AC recharge | Up to 1,400 W; 0–80% in 36 min (OUPES listing). Bob Vila reports a full charge in under 1.5 hours |
| Solar input | Up to 800 W. Published voltage windows vary by source; check the manual before wiring panels in series |
| AC + solar | Up to 2,200 W combined (OUPES) |
| UPS switchover | Under 20 ms (OUPES figure) |
| Expansion | Up to 2 × OUPES B2 (2,048 Wh each), 5,120 Wh total |
| App | OUPES app for monitoring and port control; The Solar Lab calls it dated |
| Warranty | Varies by listing (3 to 5 years, sometimes with a registration bonus) — confirm at checkout |
| Weight | About 27.8 lb (The Solar Lab rounds to 28 lb) |
| Price now | $446.49 |
OUPES Mega 1 vs Mega 1 Lite: Which One?
The Lite has the same 1,024Wh battery, 2,000W inverter (4,500W surge) and 800W solar ceiling. According to OUPES's Amazon listings, it differs in four ways:
| Feature | Mega 1 | Mega 1 Lite |
|---|---|---|
| B2 expansion | Up to 2 (5,120 Wh) | Not listed |
| USB-C | 2 × 100W | 2 × 140W |
| Ports | 13 | 9 |
| Weight | 27.8 lb | 26.7 lb |
| AC charge claim | 0–80% in 36 min | 0–100% in 46 min |
| Listed warranty | Varies by listing (3 yr on the 240W kit) | 5 yr on its listing |
| Our rating | 89/100 | 87/100 |
| Price now | $446.49 | $489.00 |
Pick the Mega 1 for the expansion path. A B2 battery triples its capacity later without buying a second inverter. Pick the Lite only if you want 140W USB-C for a large laptop and you are sure 1 kWh is enough. Its listing does carry a clearer 5-year warranty line. The charge-time claims are not directly comparable, because one is to 80% and the other is to 100%.
Solar Charging and the B2 Battery
Solar: the Mega 1 accepts up to 800W of solar (The Solar Lab; OUPES). That is more than the Jackery Explorer 1000 V2's 400W and the Anker C1000 Gen 2's 600W, though less than the EcoFlow Delta 3 Plus and Bluetti Elite 100 V2 (1,000W each). At about 70% real-world panel output, a full charge from empty takes roughly 1.8 hours of strong sun with a full 800W array. Published solar voltage windows differ between OUPES pages and reviews, so confirm the range in the manual before wiring panels in series.
The 240W kit: OUPES sells the Mega 1 with one 240W folding panel. Its listing says that panel refills the station in 5–8 hours depending on sun, and it states a 3-year warranty. The kit is currently $693.49 on Amazon.
B2 expansion: the B2 is OUPES's 2,048Wh LiFePO4 extra battery. One B2 takes the Mega 1 to 3,072Wh and two take it to 5,120Wh (Bob Vila; The Solar Lab). Expansion adds runtime, not power: the inverter still tops out at 2,000W. Among the 1 kWh units we compare, the Anker C1000 Gen 2 and Bluetti Elite 100 V2 cannot add batteries at all. See expandable power stations for how other brands handle it.
What Independent Reviewers Found: Fan Noise, Surge and Efficiency
SolarGenAdvisor does not test products itself. These findings come from two independent published reviews, credited below:
- • Fan noise: The Solar Lab calls the fans “very, very loud.” Bob Vila says the fan was noticeably louder than on other stations it reviewed, especially while wall charging.
- • Surge behavior: The Solar Lab reports that under surge loads the Mega 1 pulls output voltage down rather than briefly exceeding 2,000W, which it says could affect voltage-sensitive electronics. Keep computers and CPAPs off the same outlets as compressors or power tools.
- • Efficiency: The Solar Lab ran a 1,779W load for 27 minutes and rated efficiency at about 79%. Our runtime table uses 85%, so expect somewhat less at very high draw.
- • Real-world use: Bob Vila ran power tools, a refrigerator and a microwave on it, and rated it 4.7/5. The Solar Lab praises OUPES's customer support but calls the app dated and the display hard to read at some angles.
How Long Will the OUPES Mega 1 Run a Fridge, CPAP or Microwave?
Estimates use 1,024Wh × 0.85, about 870Wh usable after inverter losses, divided by the load. The last column adds two B2 batteries (5,120Wh total).
| Load | Typical draw | Mega 1 | With 2 × B2 |
|---|---|---|---|
| Smartphone | ~12Wh per charge | ~72 charges | ~362 charges |
| CPAP (no humidifier) | ~40W | ~21.8 hrs | ~108.8 hrs |
| 12V camping fridge (average) | ~45W | ~19.3 hrs | ~96.7 hrs |
| Wi-Fi router + modem | ~20W | ~43.5 hrs | ~217.6 hrs |
| Laptop | ~60W | ~14.5 hrs | ~72.5 hrs |
| Full-size fridge (compressor running) | ~150W | ~5.8 hrs | ~29.0 hrs |
| Microwave | ~1,000W | ~52 min | ~4.4 hrs |
| Space heater (high) | ~1,500W | ~35 min | ~2.9 hrs |
That works out to two to three CPAP nights, about six hours of a fridge compressor running nonstop (longer in practice, because compressors cycle), or a weekend of router, phones and a 12V cooler. A space heater drains it in well under an hour, so heat with blankets in a winter outage. Sizing help: what size solar generator do I need.
OUPES Mega 1 vs Jackery, Anker, EcoFlow and Bluetti
All five are 1 kWh-class LiFePO4 stations already rated on our site. Specs and ratings come from our product database. “$ per Wh” uses today's Amazon price and is blank when there is no live price.
| Model | Capacity | Output / surge | Solar in | Weight | Rating | $ per Wh | Price |
|---|---|---|---|---|---|---|---|
| OUPES Mega 1 | 1,024 Wh | 2,000W / 4,500W | 800W | 27.8 lb | 89 | $0.44/Wh | $446.49 |
| Jackery Explorer 1000 V2 | 1,070 Wh | 1,500W / 3,000W | 400W | 23 lb | 93 | $0.52/Wh | $559.00 |
| Anker SOLIX C1000 Gen 2 | 1,024 Wh | 2,000W / 3,000W | 600W | 24.9 lb | 92 | $0.52/Wh | $529.99 |
| EcoFlow Delta 3 Plus | 1,024 Wh | 1,800W / 2,400W | 1,000W | 26 lb | 89 | $0.70/Wh | $719.00 |
| Bluetti Elite 100 V2 | 1,024 Wh | 1,800W / 3,600W | 1,000W | 25 lb | 90 | $0.49/Wh | $499.00 |
vs Jackery Explorer 1000 V2: the Jackery is the carry-it-everywhere pick at 23 lb, and it rates highest of this group in our scoring (93). The Mega 1 counters with 500W more output, double the solar input and B2 expansion. See the Jackery Explorer 1000 V2 review.
vs Anker SOLIX C1000 Gen 2: both deliver 2,000W. The Anker is about 2.9 lb lighter and has a longer independent review record, but it cannot be expanded and takes less solar. Read the Anker SOLIX C1000 Gen 2 review.
vs EcoFlow Delta 3 Plus: the EcoFlow is lighter, takes 1,000W of solar and also expands. The Mega 1 has more output and a higher surge rating. It is the closest rival on features, so compare the live prices above. Read the EcoFlow Delta 3 Plus review.
vs Bluetti Elite 100 V2: the Bluetti is lighter at 25 lb with 1,000W of solar, but it is not expandable. Choose the Mega 1 if a B2 upgrade path matters. See the Bluetti Elite 100 V2 review.
More options: best 1000Wh solar generators, best solar generator under $1,000 and the full OUPES power station guide.
OUPES Mega 1 Pros & Cons
What We Like
- • Strong value — 1,024Wh LiFePO4 and 2,000W for a budget price
- • 4,500W surge rating, the highest listed of the five units we compare
- • Expands to 5,120Wh with two B2 batteries
- • 800W solar input and up to 2,200W combined AC + solar charging
- • 13 ports, 3,500+ cycle rating, sub-20 ms UPS (OUPES figures)
What Could Be Better
- • Loud fans, per The Solar Lab and Bob Vila
- • Voltage sags under surge, per The Solar Lab
- • About 27.8 lb — heavier than the Jackery, Anker and Bluetti rivals
- • Warranty terms differ by listing
- • Dated app, no built-in light (The Solar Lab)
Final Verdict: Should You Buy the OUPES Mega 1?
The OUPES Mega 1 scores 89/100 in our scoring matrix. It scores well on value, output, solar input and expandability. It loses points on portability, on reviewer reports of loud fans and surge voltage sag, and on warranty terms that differ between listings. That puts it a few points behind the Jackery, Anker, Bluetti and EcoFlow 1 kWh stations, each of which cost more per watt-hour at the Amazon prices we logged in late October 2026.
If your priority is the most capacity, output and upgrade path per dollar, for outage backup in a garage, a camping basecamp or a van, the Mega 1 is one of the best-value 1 kWh stations available. The Mega 1 has historically been discounted well below its list price (deal posts on Slickdeals and The Solar Lab's price notes), so compare the live price with the rivals above before you buy. Budget alternatives are in our best budget solar generator award.
OUPES Mega 1 FAQ
Is the OUPES Mega 1 worth it?
For buyers who want the most 1 kWh capacity and output for the money, yes. It pairs 1,024Wh of LiFePO4 with 2,000W of output (4,500W surge), 800W of solar input and expansion to 5,120Wh with two B2 batteries. Skip it if you will sleep next to it or carry it often: The Solar Lab and Bob Vila both describe the fans as loud, and at about 27.8 lb it is heavier than the Jackery, Anker and Bluetti 1 kWh units we compare. It scores 89/100 in our scoring.
Is the OUPES Mega 1 expandable?
Yes. OUPES says the Mega 1 accepts up to two B2 extra batteries (2,048Wh each) for 5,120Wh total, and Bob Vila and The Solar Lab report the same ceiling. Expansion adds stored energy only. Output stays at 2,000W. The Mega 1 Lite listing mentions no expansion support.
What is the difference between the OUPES Mega 1 and Mega 1 Lite?
Both have a 1,024Wh LiFePO4 battery, a 2,000W inverter (4,500W surge) and up to 800W of solar input. According to OUPES's Amazon listings, the Mega 1 supports B2 expansion to 5,120Wh and has 13 ports with two 100W USB-C. The Mega 1 Lite has 9 ports with two 140W USB-C, weighs about 26.7 lb against 27.8 lb, and its listing mentions no expansion support. Most buyers should pick the Mega 1 for the upgrade path.
How long does the OUPES Mega 1 take to charge?
From the wall, OUPES's Amazon listing claims 0-80% in 36 minutes, and Bob Vila reports a full AC charge in under 1.5 hours. Combined AC and solar input is listed at up to 2,200W. On solar alone, up to 800W, a full charge takes roughly 2 hours of strong sun at about 70% real-world panel output. OUPES's listing for the 240W panel kit says that single panel needs 5-8 hours.
How long will the OUPES Mega 1 run a refrigerator?
A full-size refrigerator drawing about 150W with its compressor running nonstop would run roughly 5.8 hours on the Mega 1, using 1,024Wh x 0.85 for inverter losses. Compressors cycle on and off, so a modern fridge averaging about 55W over a day runs closer to 16 hours. Check your fridge's label. One B2 battery roughly triples those figures.
OUPES Mega 1 vs EcoFlow Delta 3 Plus: which is better?
The EcoFlow rates higher in our scoring (89 vs 89). It is lighter (26 lb vs 27.8 lb), takes 1,000W of solar against 800W, and has a longer independent review record. The OUPES has more output (2,000W vs 1,800W) and a higher surge rating. Choose the Mega 1 if its live price is meaningfully lower and you can live with louder fans.
What warranty does the OUPES Mega 1 have?
It varies by listing, so confirm at checkout. On October 31, 2026, OUPES's Amazon listing for the Mega 1 with a 240W panel stated 3 years. OUPES's Mega 1 FAQ says 36 months, its Mega Series page says 5 years, and some deal posts mention a sixth year after registration. Register the unit with OUPES either way.
Sources: OUPES Amazon listings for the Mega 1, Mega 1 Lite and Mega 1 + 240W kit (titles, bullets and warranty lines checked October 31, 2026: 2,000W/4,500W, 36 min to 80%, under 20 ms UPS, 3,500+ cycles, B2 to 5,120Wh, 2,200W AC + solar, 27.8 lb); OUPES Mega 1 product page (800W solar, 1,400W AC, B2 expansion, 13 outputs); The Solar Lab Mega 1 review (800W solar, 28 lb, ports, 79% efficiency at 1,779W, surge voltage sag, fan noise, app); Bob Vila Mega 1 review (27.8 lb, 13 outlets, B2 to 5,120Wh, AC charge under 1.5 hours, fan noise). SolarGenAdvisor does not physically test products. Ratings are AI-assisted syntheses of specs, Amazon pricing and published reviews, scored with our scoring matrix and reviewed by our editor.