Portable power and solar generators

OUPES MEGA 1 vs MEGA 2: Capacity, Solar Input and Portability

Published · By the SolarPanelX editors · Updated · See individual checks and dates below

Summary

For portability, the MEGA 1 is the lighter option; for stored energy and higher solar-input limits, the MEGA 2 offers more capacity. The MEGA 2 stores twice as much energy (2,048 Wh against 1,024 Wh), but the wider gap is solar input. The MEGA 1 takes up to 800 W at 12–78 V DC, the MEGA 2 up to 2,100 W at 12–148 V DC, and only the MEGA 2 has a TT-30R outlet for an RV. The MEGA 1 weighs 27.8 lb and the MEGA 2 48.5 lb.

The spec sheets side by side

SpecMEGA 1MEGA 2
Capacity1,024 Wh2,048 Wh
AC output (surge)2,000 W (4,500 W)2,500 W (5,400 W)
AC outlets4 × NEMA 5-20R4 × NEMA 5-20R, 1 × TT-30R
Solar input800 W, 12–78 V DC2,100 W, 12–148 V DC
MPPT range18–75 V, 14 A18–140 V, 15 A
AC charging (fast/slow)1,400 W / 700 W1,600 W / 800 W
With B2 batteries5,120 Wh with two10.24 kWh with four
Weight27.8 lb (12.6 kg)48.5 lb (22.0 kg)

Both run on LiFePO4 cells rated for more than 3,500 cycles to 80%, and both carry a five-year warranty that grows by a year when the owner registers. Every AC outlet on both units is 120 V. Neither has a 240 V output.

Counting 240 W panels

OUPES's 240 W folding panel is listed at 24.6 V open circuit and 20.5 V and 11.7 A at maximum power. The store's bundles stop at two of these panels for the MEGA 1 and four for the MEGA 2. Four panels come to 960 W, under half of the MEGA 2's 2,100 W ceiling. How many panels to connect, and whether in series or parallel, follows the input voltage and current limits in OUPES's manual.

The B2 expansion battery (2,048 Wh) carries its own solar input of up to 2,100 W through an 18–140 V, 15 A MPPT. One B2 takes a MEGA 1 to 3,072 Wh.

Choosing between portability and capacity

The MEGA 1 is 20.7 lb lighter in the listed specifications, which matters if you will move it frequently. The MEGA 2 doubles nominal battery capacity and raises the AC-output and solar-input limits. Those ratings do not guarantee a particular appliance runtime: actual use depends on the load, conversion losses and operating conditions.

The MEGA 2's TT-30R outlet is still 120 V, not a 240 V supply. Do not confuse the MEGA 2 reviewed here with the separately named MEGA 2 Pro, or the MEGA 1 with the MEGA 1 Lite. Check the exact model on the product page before comparing specifications or expansion compatibility.

Price and availability checked October 23, 2026

The official MEGA 2 page now displays $1,499 and marks the model sold out. The earlier $729 preorder price and October 15 shipping estimate are historical, so this article no longer recommends choosing it on the basis of a $30 difference from the MEGA 1.

ModelCurrent price verificationAvailability verification
MEGA 1Not reverified in this updateCheck the official page
MEGA 2, base unit$1,499 displayed on October 23, 2026Marked sold out on the official page

Compare the same base-unit or bundle configuration and delivered price. Panel and expansion-battery prices have been removed pending a fresh comparison; do not assume a historical accessory price is still available.

The capacity and specification comparison above is based on the linked product specifications, not hands-on testing. Confirm the latest manuals and exact variant before purchase.

Shopping for one? Browse portable power stations →

Sources

  1. OUPES — Mega 1 Home Backup & Portable Power Station (specs and prices)
  2. OUPES — Mega 2 Home Backup & Portable Power Station (specs and prices)
  3. OUPES — 240W Portable Solar Panel
  4. OUPES — B2 Multi-functional Extra Battery
  5. OUPES — How to Choose an OUPES MEGA Series Power Station: 2026 Buying Guide (July 23, 2026)

We have not tested these products. Specs, prices, stock and terms are as published on these pages on the date above and can change; check the manufacturer or retailer before you buy.

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