Wattstanding
OUPES Mega 2 Pro Home Backup & Portable Power Station

Product image: OUPES

Home battery system · OUPES

OUPES Mega 2 Pro Home Backup & Portable Power Station

OUPES · 2,048 Wh · 2,500 W AC output

The short answer

The OUPES Mega 2 Pro Home Backup & Portable Power Station stores 2,048 Wh and the maker lists 2,500 W of continuous AC output. By our calculation a full charge runs a typical refrigerator for roughly 29.0 h, and the unit can power 19 of the 20 appliances we model. OUPES lists it at $699, about $341 per kWh of storage.

Capacity
2,048 Wh
AC output
2,500 W
Weight
48.8 lb
Price seen
$699

Good fit if

  • You want essentials covered for a day or more, recharged by solar or between outages
  • You need to start motor loads such as a sump pump within the unit's output

Look elsewhere if

  • You want to power a whole house or electric heat
  • You can only charge it from a wall outlet and need days of runtime
  • You need a confirmed surge rating — the sources we read do not state one
$699OUPES listed price (base model) · seen 30 Sep 2026
View at OUPES

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

What it can run, and for how long

A power station is a battery with an inverter: it stores energy as watt-hours (Wh) and delivers it as AC watts (W). The OUPES Mega 2 Pro Home Backup & Portable Power Station stores 2,048 Wh, of which about 1,741 Wh reaches your appliances after losses, and its inverter limits the load to 2,500 W at a time.

Appliances this unit can run, with estimated runtime on a full charge
Appliance (typical)Running / starting wattsCan it run it?Runtime on a full charge
Refrigerator (modern, about 18–22 cu ft)150 W / 600 W startYes29.0 h18%
Chest freezer (about 7 cu ft)100 W / 400 W startYes2.1 days31%
Sump pump (1/3 hp)800 W / 1,500 W startYes14.5 h9%
Well pump (1/2 hp)1,000 W / 2,100 W startYes8.7 h6%
Gas furnace blower750 W / 1,500 W startYes4.6 h3%
Window air conditioner (5,000–8,000 BTU)600 W / 1,800 W startYes4.8 h3%
CPAP with heated humidifier70 WYes24.9 h16%
Home oxygen concentrator300 WYes5.8 h4%
Wi-Fi router and modem25 WYes2.9 days44%
LED television (55 in)100 WYes17.4 h11%
LED lighting (10 bulbs)100 WYes17.4 h11%
Laptop and charger60 WYes29.0 h18%
Phones and tablets charging (4)40 WYes43.5 h28%
Ceiling or box fan75 W / 150 W startYes23.2 h15%
Microwave oven (1,000 W cooking)1,500 WYes11.6 h7%
Coffee maker900 WYes19.3 h12%
Garage door opener (1/2 hp)550 W / 1,100 W startYes6.6 days100%
Washing machine500 W / 1,300 W startYes8.7 h6%
Electric space heater (1,500 W)1,500 WYes1.2 h2%
Central air conditioner (3-ton)3,500 W / 10,500 W startNo—
Wattstanding calculationWattstanding calculation — runtime = capacity (Wh) × 85% ÷ (running watts × duty cycle). The 85% covers inverter and conversion losses; duty cycle is the share of time the appliance actually draws power. Appliance wattages are typical planning values, not measurements — read the nameplate on your own appliance. Real runtime also depends on temperature, battery age and the maker's inverter efficiency.
Outage scenarios
ScenarioRunning wattsStarting watts neededAverage drawFitsEstimated runtime
Essentials: refrigerator, router, lights, phones315 W765 W225 WFits7.7 h
Essentials + sump pump1,115 W1,815 W345 WFits5.0 h
Essentials + furnace blower + TV1,165 W1,915 W700 WFits2.5 h
Essentials + window air conditioner915 W2,115 W585 WFits3.0 h
Practical noteCooling appliances cycle on and off, so a refrigerator draws far less than its running watts over a day, but each start needs a brief surge. If a load's starting watts exceed the maker's surge rating, the inverter can shut down.

Recharging

Recharge time depends on the source. Solar numbers below are our calculation for the panel wattage shown, assuming 75% real-world output and the approximate annual-average peak sun hours for each region; winter and cloud cover cut them sharply.

Days of sun to refill from empty
Panel totalBasisFlorida and the Gulf CoastTexasCalifornia
100 W—5.3 sunny days5.5 sunny days5.0 sunny days
200 W—2.6 sunny days2.7 sunny days2.5 sunny days
400 W—1.3 sunny days1.4 sunny days1.2 sunny days
  • solar input up to 480 W (as stated)

See the solar recharge calculator for your own panel size and sun hours.

Connecting it to a home

You can plug appliances straight into the unit's outlets. Powering a home's circuits is different: it needs a properly rated transfer switch or the maker's home-integration hardware, installed by a licensed electrician.

SafetyNever plug a generator or battery system into a wall outlet to power the house ("backfeeding"): it can send electricity back into the utility lines and injure line workers, and it can start fires. Connecting a generator to a home's wiring is a job for a licensed electrician, with the permit and inspection your local code requires. Wattstanding does not give wiring instructions.

If you plan to connect it to the house, compare it with the equipment in our transfer switch and hookup library and read the whole-house guide.

Fit check before you buy

Checks to make against your loads and your plan before ordering.

✓ Required? Check firsti Good to know
  • ✓Loads fit the outputAdd up the running watts of everything you will run together; keep the total under 2,500 W.
  • ?Starting surgeNo surge rating was stated in the sources we read; confirm with the maker before running motors.
  • ?Outlets and voltage4*NEMA 5-20R (120V/20A) The listing mentions 120/240 V output — confirm which model variant has it.
  • iRecharge planDecide how you will refill it: wall power, solar or a generator, within its stated input limits.
  • iExpansionUp to 10.24kWh with 4 B2
  • iWeight48.8 lb as stated — plan how you will move it.

Specifications

Each figure is labelled with where it comes from. Numbered references link to the source list below.

Manufacturer storeRetailer listingWattstanding calculationNot verified

Published specifications

Battery capacity2,048 Wh[S1]Manufacturer store
Continuous AC output2,500 W[S1]Manufacturer store
120/240 V outputListed[S1]Manufacturer store
Cycle life4,000 cycles to 80% capacity[S1]Manufacturer store
AC outlets4*NEMA 5-20R (120V/20A)[S1]Manufacturer store
USB-C ports2*USB-C (PD 140W per port)[S1]Manufacturer store
UPS / switchoverKeep your essentials running without interruption. With a 20[S1]Manufacturer store
Solar input (as stated)480 W[S1]Manufacturer store
ExpansionUp to 10.24kWh with 4 B2[S1]Manufacturer store
Weight48.8 lb[S1]Manufacturer store
Dimensions18.8*11.6*11.6in (468*294*296mm)[S1]Manufacturer store
App / connectivityDon't leave your comfort at home. Drive power-hungry ovens, space heaters, and w[S1]Manufacturer store
WarrantyUp to 6 Years[S1]Manufacturer store

Wattstanding calculations

Usable energy (85% of capacity)1,741 WhWattstanding calculation
Refrigerator runtime (typical)29.0 hWattstanding calculation
Price per kWh of storage$341Wattstanding calculation

Limitations to weigh

  • Specifications are the maker's or seller's; Wattstanding has not tested this product.
  • Runtime figures are calculations with stated assumptions, not measurements.
  • Prices change; confirm the price, stock and what is included before ordering.
  • No surge rating was found in the sources we read.

Alternatives worth comparing

Dabbsson DBS2300 Portable & Home Backup Power Station2,330 Wh, 2,200 W; $200 more
Dabbsson DBS2300 Plus Portable & Home Backup Power Station2,330 Wh, 2,200 W; $200 more
OUPES Mega 1 Home Backup & Portable Power Station1,024 Wh, 2,000 W; same price
OUPES Mega 1 Lite Home Backup & Portable Power Station1,024 Wh, 2,000 W; $100 less

Where to buy

Our link opens this exact product page. Prices and stock change; check before you order.

$699OUPES listed price (base model) · seen 30 Sep 2026
View at OUPES

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

Questions buyers ask

How long will the OUPES Mega 2 Pro Home Backup & Portable Power Station run a refrigerator?
About 29.0 h on a full charge by our calculation (typical modern refrigerator, 40% duty cycle, 85% efficiency). Your refrigerator's nameplate and its door-opening habits change this.
Can the OUPES Mega 2 Pro Home Backup & Portable Power Station run a sump pump or well pump?
Sump pump (1/3 hp): yes. Well pump (1/2 hp): yes. These use typical wattages; read the pump's nameplate.
Can I use it to power my whole house?
Not by plugging the house into it. With 2,048 Wh it holds about 7% of one day's energy for a home that uses 30 kWh a day (an example figure — check your own bill), and connecting it to home wiring needs a licensed electrician.
Where can I buy the OUPES Mega 2 Pro Home Backup & Portable Power Station?
1 seller list it: OUPES.

Sources and verification

  1. OUPES — OUPES Mega 2 Pro Home Backup & Portable Power Station — product page and specifications Retrieved 30 Sep 2026

Wattstanding has not tested this product hands-on. This reference is compiled from the sources above; our calculations are labelled and show their working. Electrical work belongs to a licensed electrician. Last verified 30 Sep 2026. How we work