Power System Calculator
Size your system in three steps and see the power stations and generators that fit.
Rather have our team size it? Get a free system plan
What Are You Powering?
Each choice loads a starter list. Change anything below.
Your Appliances
Set how long and how many for each one. Select the pencil to change its watts.
Add at least one appliance to see your results.
Quick add:
Runtime and Recharging
Sizing Cushion
A cushion keeps the system from running at its limit and covers appliances that use more than their label says.
Power Station Sizing Chart
Every power station the calculator can recommend, with the specs it checks. Run the calculator and your best fit is highlighted.
| Model | Output | Start-Up | Battery | Expands To | Solar Input | 120V/240V | Price |
|---|---|---|---|---|---|---|---|
| Anker SOLIX S5000Your Pick | 4,500 W | 8,000 W | 5,024 Wh | â | 3,000 W | Yes | Sold out |
| Jackery Explorer 300 PlusYour Pick | 300 W | 600 W | 288 Wh | â | 100 W | 120V | Sold out |
| BLUETTI Elite 30 V2 Portable Power StationYour Pick | 600 W | Not listed | 288 Wh | â | 200 W | 120V | $244.71 |
| OUKITEL P800 Portable Power StationYour Pick | 800 W | 1,600 W | 512 Wh | â | 200 W | 120V | $261.39 |
| Jackery Explorer 300 v2 Portable Power StationYour Pick | 300 W | 600 W | 288 Wh | â | 100 W | 120V | $269.00 |
| EcoFlow RIVER 2 Max 500 Portable Power StationYour Pick | 500 W | 1,000 W | 499 Wh | â | 220 W | 120V | $309.00 |
| BLUETTI AC50P Portable Power StationYour Pick | 700 W | Not listed | 504 Wh | â | 200 W | 120V | $319.00 |
| Jackery Explorer 500 v2Your Pick | 500 W | 1,000 W | 512 Wh | â | 200 W | 120V | $359.00 |
| Pecron E1000LFP Portable Power StationYour Pick | 1,800 W | 3,000 W | 1,024 Wh | 4,864 Wh | 600 W | 120V | Sold out |
| Dark Energy Recon 300Your Pick | 300 W | 600 W | 270 Wh | â | 54 W | 120V | $399.99 |
| BLUETTI AC70P Portable Power StationYour Pick | 1,000 W | Not listed | 864 Wh | â | 500 W | 120V | $407.06 |
| BLUETTI Handsfree 2 Backpack Power StationYour Pick | 700 W | Not listed | 512 Wh | â | 350 W | 120V | Sold out |
| OUKITEL P1000 PLUS Portable Power StationYour Pick | 1,800 W | 3,600 W | 1,024 Wh | â | 500 W | 120V | $451.25 |
| Pecron F1000LFP Portable Power StationYour Pick | 1,500 W | 3,000 W | 960 Wh | â | 600 W | 120V | $459.00 |
| EcoFlow DELTA 3 Classic Portable Power StationYour Pick | 1,800 W | 3,600 W | 1,024 Wh | â | 500 W | 120V | $479.00 |
| Jackery Explorer 1000 v2Your Pick | 1,500 W | 3,000 W | 1,070 Wh | â | 400 W | 120V | $499.00 |
| Jackery Explorer 600 v2 Portable Power StationYour Pick | 500 W | 1,000 W | 640 Wh | â | 200 W | 120V | $499.00 |
| BLUETTI Premium 100 V2 Portable Power StationYour Pick | 1,800 W | 3,600 W | 1,024 Wh | â | 1,000 W | 120V | $505.89 |
| Jackery HomePower 1000 v2 Portable Power StationYour Pick | 1,500 W | 3,000 W | 1,024 Wh | â | 400 W | 120V | $549.00 |
| Pecron E1500LFP V3 Portable Power StationYour Pick | 2,200 W | 4,400 W | 1,536 Wh | 5,376 Wh | 1,000 W | 120V | $549.69 |
| Anker SOLIX C1000 Gen 2Your Pick | 2,000 W | 2,400 W | 1,024 Wh | â | 600 W | 120V | $549.99 |
| Anker SOLIX C1000X Gen 2Your Pick | 2,000 W | 2,400 W | 1,024 Wh | â | 600 W | 120V | $549.99 |
| EcoFlow DELTA 3 Portable Power StationYour Pick | 1,800 W | 3,600 W | 1,024 Wh | 2,048 Wh | 500 W | 120V | $579.00 |
| EcoFlow RIVER 2 Pro Portable Power StationYour Pick | 800 W | 1,600 W | 768 Wh | â | 220 W | 120V | Sold out |
| BLUETTI AC180P Portable Power StationYour Pick | 1,800 W | Not listed | 1,440 Wh | â | 500 W | 120V | $601.18 |
| Jackery HomePower 1000 Plus v2 Portable Power StationYour Pick | 1,500 W | 3,000 W | 1,024 Wh | 7,168 Wh | 400 W | 120V | $639.00 |
| Pecron E2400LFP Portable Power StationYour Pick | 2,400 W | 4,000 W | 2,048 Wh | 5,888 Wh | 700 W | 120V | $649.00 |
| EcoFlow DELTA 3 PlusYour Pick | 1,800 W | 3,600 W | 1,024 Wh | 2,048 Wh | 1,000 W | 120V | Sold out |
| Anker SOLIX S2000 Portable Power StationYour Pick | 1,500 W | 2,600 W | 2,010 Wh | â | 400 W | 120V | $729.99 |
| OUKITEL P2001 Plus Portable Power StationYour Pick | 2,400 W | 4,800 W | 2,048 Wh | â | 500 W | 120V | $735.00 |
| BLUETTI Pioneer Na Sodium-Ion Portable Power StationYour Pick | 1,500 W | Not listed | 900 Wh | â | 500 W | 120V | $778.83 |
| Jackery FridgeGuardYour Pick | 800 W | 1,600 W | 1,024 Wh | 2,048 Wh | 500 W | 120V | $779.00 |
| Jackery Explorer 1500 v2Your Pick | 2,000 W | 4,000 W | 1,536 Wh | â | 400 W | 120V | $849.00 |
| BLUETTI Premium 200 V2 Portable Power StationYour Pick | 2,700 W | Not listed | 2,074 Wh | â | 1,000 W | 120V | $861.18 |
| Arkpax Ark Portable Power StationYour Pick | 1,800 W | 3,300 W | 1,500 Wh | â | 400 W | 120V | $873.75 |
| EcoFlow DELTA 3 Max Portable Power StationYour Pick | 2,400 W | 4,800 W | 2,048 Wh | â | 500 W | 120V | $879.00 |
| Jackery Explorer 2000 v2 Portable Power StationYour Pick | 2,200 W | 4,400 W | 2,042 Wh | â | 400 W | 120V | $899.00 |
| Pecron F3000LFP Portable Power StationYour Pick | 3,600 W | 4,500 W | 3,072 Wh | 10,752 Wh | 1,600 W | 120V | $899.00 |
| BLUETTI Elite 200 V2 Portable Power StationYour Pick | 2,600 W | Not listed | 2,074 Wh | â | 1,000 W | 120V | $899.00 |
| BLUETTI AC200P L Portable Power StationYour Pick | 2,400 W | 3,600 W | 2,304 Wh | â | 1,200 W | 120V | $999.00 |
| Pecron E3600LFP Portable Power StationYour Pick | 3,600 W | 7,000 W | 3,072 Wh | 14,592 Wh | 2,400 W | 120V | $999.00 |
| Anker SOLIX C2000 Gen 2Your Pick | 2,400 W | 3,000 W | 2,048 Wh | 4,096 Wh | 800 W | 120V | Sold out |
| Anker SOLIX C2000X Gen 2Your Pick | 2,400 W | 3,000 W | 2,048 Wh | 4,096 Wh | 800 W | 120V | $999.99 |
| EcoFlow DELTA 2 Max Portable Power StationYour Pick | 2,400 W | 4,800 W | 2,048 Wh | â | 1,000 W | 120V | Sold out |
| Jackery Explorer 1500 Ultra Portable Power StationYour Pick | 1,800 W | 3,600 W | 1,536 Wh | â | 800 W | 120V | $1,079.00 |
| Mango Power E Home Backup and Portable Power StationYour Pick | 3,000 W | Not listed | 3,533 Wh | 7,066 Wh | 2,000 W | 120V | $1,299.00 |
| EcoFlow DELTA 3 Ultra Portable Power StationYour Pick | 3,600 W | 7,200 W | 3,072 Wh | â | 800 W | 120V | $1,299.00 |
| Pecron E3800LFP Portable Power StationYour Pick | 4,200 W | 5,000 W | 3,840 Wh | â | 3,000 W | 120V | Sold out |
| Jackery HomePower 3000 Portable Power StationYour Pick | 3,600 W | 7,200 W | 3,072 Wh | â | 1,000 W | 120V | $1,349.00 |
| BLUETTI Apex 300 Portable Power StationYour Pick | 3,840 W | Not listed | 2,765 Wh | 19,349 Wh | 2,400 W | Yes | $1,499.00 |
| Arkpax Ark Evo Portable Power StationYour Pick | 1,800 W | 3,300 W | 1,200 Wh | â | 800 W | 120V | $1,581.25 |
| EcoFlow DELTA 3 Ultra Plus Portable Power StationYour Pick | 3,600 W | 7,200 W | 3,072 Wh | â | 1,600 W | 120V | Sold out |
| Jackery HomePower 3600 PlusYour Pick | 3,600 W | 7,200 W | 3,584 Wh | â | 1,000 W | 120V | $1,709.00 |
| EcoFlow DELTA Pro Portable Power StationYour Pick | 3,600 W | 7,200 W | 3,600 Wh | â | 1,600 W | 120V | $1,799.00 |
| Jackery HomePower 3600 Pro Max Portable Power StationYour Pick | 4,000 W | 8,000 W | 3,584 Wh | 21,504 Wh | 1,200 W | Yes | Sold out |
| Anker SOLIX F3000Your Pick | 3,600 W | Not listed | 3,072 Wh | â | 2,400 W | Yes | Sold out |
| Arkpax Ark ProYour Pick | 2,400 W | 4,800 W | 2,300 Wh | 25,300 Wh | 1,200 W | 120V | $1,879.00 |
| Dark Energy Recon 2000Your Pick | 2,400 W | 4,000 W | 2,016 Wh | â | 650 W | 120V | $1,999.99 |
| Pecron F5000LFPYour Pick | 7,200 W | Not listed | 5,120 Wh | 35,840 Wh | 6,400 W | Yes | Sold out |
| Anker SOLIX F3800 PlusYour Pick | 6,000 W | Not listed | 3,840 Wh | 26,880 Wh | 3,200 W | Yes | Sold out |
| Jackery Explorer 5000 PlusYour Pick | 7,200 W | 14,400 W | 5,040 Wh | 30,240 Wh | 4,000 W | Yes | $3,149.00 |
| EcoFlow DELTA Pro UltraYour Pick | 7,200 W | Not listed | 6,144 Wh | 30,720 Wh | 5,600 W | Yes | Sold out |
| EcoFlow DELTA Pro Ultra X (12 kWh)Your Pick | 12,000 W | Not listed | 12,288 Wh | â | 10,000 W | Yes | $7,899.00 |
Where no surge rating is listed, the calculator uses the continuous rating. Expands To shows the expansion batteries the calculator can add; some other units expand too, so ask us.
Generator Sizing Chart
Inverter, portable and home standby generators the calculator can recommend. Running watts cover what runs at once, and starting watts cover the biggest motor.
| Model | Type | Running | Starting | Fuel | 120V/240V | Runtime | Price |
|---|---|---|---|---|---|---|---|
| Firman P01204 Gasoline 1200W/1500W Portable GeneratorYour Pick | Portable | 1,200 W | 1,500 W | Gas | 120V | â | $469.99 |
| ALP 850W/1000W Portable Propane GeneratorYour Pick | Portable | 850 W | 1,000 W | Propane | 120V | â | Sold out |
| Generac GP3600Your Pick | Portable | 3,600 W | 4,500 W | Gas | 120V | 9.3 hrs | $581.30 |
| Cummins Onan P2500iYour Pick | Inverter | 2,200 W | 2,500 W | Gas | 120V | 8 hrs | $623.75 |
| DuroMax XP5500HXYour Pick | Portable | 4,500 W | 5,500 W | Gas / propane | Yes | 9 hrs | $641.18 |
| DuroMax XP2300iH Dual Fuel 1800W/2300W Portable Inverter GeneratorYour Pick | Inverter | 1,800 W | 2,300 W | Gas / propane | 120V | 7 hrs | Sold out |
| Firman W01783 Gasoline 1700W/2100W Inverter Portable GeneratorYour Pick | Inverter | 1,700 W | 2,100 W | Gas | 120V | â | $649.99 |
| Generac GP2500i Gasoline 2200W/2500W Portable Inverter GeneratorYour Pick | Inverter | 2,200 W | 2,500 W | Gas | 120V | â | $687.18 |
| EcoFlow Dual Fuel 2000W/2200W Smart Generator 3000Your Pick | Inverter | 2,000 W | 2,200 W | Gas / propane | 120V | â | $689.00 |
| Firman P03504 Gasoline 3550W/4450W Portable GeneratorYour Pick | Portable | 3,550 W | 4,450 W | Gas | 120V | â | $749.99 |
| Firman P03503 Gasoline 3550W/4450W Portable GeneratorYour Pick | Portable | 3,550 W | 4,450 W | Gas | 120V | 14 hrs | $789.99 |
| Firman P03634 Gasoline 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas | Yes | â | $799.99 |
| Firman W01781 Gasoline 1700W/2100W Inverter Portable GeneratorYour Pick | Inverter | 1,700 W | 2,100 W | Gas | 120V | â | $819.99 |
| Firman W01785 Gasoline 1700W/2100W Inverter Portable GeneratorYour Pick | Inverter | 1,700 W | 2,100 W | Gas | 120V | â | $849.99 |
| Firman P03613 Gasoline 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas | 120V | â | $849.99 |
| DuroStar DS13000MX Dual Fuel 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane | Yes | 8.5 hrs | Sold out |
| Generac 3300i Gasoline 2500W/3300W Portable Inverter GeneratorYour Pick | Inverter | 2,500 W | 3,300 W | Gas | 120V | 4.5 hrs | $898.95 |
| Generac GP6500 Gasoline 6500W/8125W Portable GeneratorYour Pick | Portable | 6,500 W | 8,125 W | Gas | Yes | 10.5 hrs | $898.95 |
| Firman P03628 Gasoline 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas | 120V | â | $899.99 |
| Firman H03655 Dual Fuel 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas / propane | 120V | â | $899.99 |
| Firman W02081 Gasoline 2000W/2500W Inverter Portable GeneratorYour Pick | Inverter | 2,000 W | 2,500 W | Gas | 120V | â | $899.99 |
| Generac iQ3800Your Pick | Inverter | 3,000 W | 3,800 W | Gas / propane | 120V | 13 hrs | $983.65 |
| Firman H03654 Dual Fuel 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas / propane | 120V | â | $999.99 |
| Firman T04472 Tri-Fuel 4400W/5500W Portable GeneratorYour Pick | Portable | 4,400 W | 5,500 W | Gas / propane / natural gas | 120V | â | $1,029.99 |
| Firman P05702 Gasoline 5700W/7125W Portable GeneratorYour Pick | Portable | 5,700 W | 7,125 W | Gas | Yes | â | $1,049.99 |
| DuroStar DS13000MXT Tri-Fuel 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane / natural gas | Yes | 8.5 hrs | Sold out |
| Cummins Onan P4500i 3700W/4500W Inverter GeneratorYour Pick | Inverter | 3,700 W | 4,500 W | Gas | 120V | â | $1,078.65 |
| Firman P03631 Gasoline 3650W/4550W Portable GeneratorYour Pick | Portable | 3,650 W | 4,550 W | Gas | Yes | â | $1,089.99 |
| Generac GP7500EYour Pick | Portable | 7,500 W | 9,400 W | Gas / propane | Yes | 10 hrs | $1,110.71 |
| Firman WH03342 Dual Fuel 3300W/4125W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 4,125 W | Gas / propane | 120V | â | $1,119.99 |
| Firman W03383 Gasoline 3300W/3650W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 3,650 W | Gas | 120V | â | $1,119.99 |
| Firman W03083 Gasoline 3000W/3300W Inverter Portable GeneratorYour Pick | Inverter | 3,000 W | 3,300 W | Gas | 120V | â | $1,129.99 |
| Firman WT03571 Tri-Fuel 3300W/4125W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 4,125 W | Gas / propane / natural gas | 120V | â | $1,129.99 |
| Generac iQ5200 Dual Fuel 3900W/5200W Portable Inverter GeneratorYour Pick | Inverter | 3,900 W | 5,200 W | Gas / propane | 120V | 9 hrs | $1,131.89 |
| Cummins Onan P4500iDFYour Pick | Inverter | 3,700 W | 4,500 W | Gas / propane | 120V | â | $1,146.15 |
| Generac GP5500E Gasoline 5500W/6875W Portable GeneratorYour Pick | Portable | 5,500 W | 6,875 W | Gas | Yes | 10 hrs | $1,163.65 |
| Cummins Onan P9500DF Dual Fuel 7500W/9500W Portable GeneratorYour Pick | Portable | 7,500 W | 9,500 W | Gas / propane | Yes | â | $1,186.25 |
| DuroStar DS10000EH Dual Fuel 8000W/10000W Portable GeneratorYour Pick | Portable | 8,000 W | 10,000 W | Gas / propane | Yes | 10 hrs | Sold out |
| Generac GP9500E Tri-Fuel 9500W/12500W Portable GeneratorYour Pick | Portable | 9,500 W | 12,500 W | Gas / propane / natural gas | Yes | 9.5 hrs | $1,237.77 |
| Firman WH03242 Dual Fuel 3200W/4000W Inverter Portable GeneratorYour Pick | Inverter | 3,200 W | 4,000 W | Gas / propane | 120V | â | $1,279.99 |
| DuroMax XP13000EH Dual Fuel 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane | Yes | 8 hrs | $1,298.82 |
| Firman WH02942 Dual Fuel 2900W/3200W Inverter Portable GeneratorYour Pick | Inverter | 2,900 W | 3,200 W | Gas / propane | 120V | â | $1,329.99 |
| Firman W03382 Gasoline 3300W/3650W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 3,650 W | Gas | 120V | â | $1,339.99 |
| Firman T07573 Tri-Fuel 7500W/9400W Portable GeneratorYour Pick | Portable | 7,500 W | 9,400 W | Gas / propane / natural gas | Yes | 12 hrs | Sold out |
| Firman T06373 Tri-Fuel 6300W/7850W Portable GeneratorYour Pick | Portable | 6,300 W | 7,850 W | Gas / propane / natural gas | Yes | â | $1,349.99 |
| Firman P06702 Gasoline 6700W/8375W Portable GeneratorYour Pick | Portable | 6,700 W | 8,375 W | Gas | Yes | â | $1,359.99 |
| Firman T08273 Tri-Fuel 6600W/8250W Portable GeneratorYour Pick | Portable | 6,600 W | 8,250 W | Gas / propane / natural gas | Yes | â | $1,379.99 |
| DuroMax XP13000HXYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane | Yes | 8.5 hrs | $1,398.82 |
| DuroStar DS13000E Gasoline 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas | Yes | 8 hrs | Sold out |
| Firman W03385 Gasoline 3300W/3650W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 3,650 W | Gas | 120V | â | Sold out |
| Firman W03386 Gasoline 3300W/3650W Inverter Portable GeneratorYour Pick | Inverter | 3,300 W | 3,650 W | Gas | 120V | â | $1,429.99 |
| Generac GP9500E Tri-Fuel 9500W/12500W Portable GeneratorYour Pick | Portable | 9,500 W | 12,500 W | Gas / propane / natural gas | Yes | â | $1,481.30 |
| DuroMax XP13000HXT Tri-Fuel 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane / natural gas | Yes | 8.5 hrs | Sold out |
| DuroStar DS13000EH Dual Fuel 10500W/13000W Portable GeneratorYour Pick | Portable | 10,500 W | 13,000 W | Gas / propane | Yes | 8 hrs | Sold out |
| Firman T08073 Tri-Fuel 8000W/10000W Portable GeneratorYour Pick | Portable | 8,000 W | 10,000 W | Gas / propane / natural gas | Yes | â | Sold out |
| Firman P06705 Gasoline 6700W/8375W Portable GeneratorYour Pick | Portable | 6,700 W | 8,375 W | Gas | Yes | â | $1,499.99 |
| Cummins Onan P5000iDF EFI Dual Fuel 3900W/5000W Portable Inverter GeneratorYour Pick | Inverter | 3,900 W | 5,000 W | Gas / propane | 120V | â | Sold out |
| Firman P06707 Gasoline 6700W/8375W Portable GeneratorYour Pick | Portable | 6,700 W | 8,375 W | Gas | Yes | â | $1,649.99 |
| DuroMax XP7000iH Dual Fuel 5500W/7000W Portable Inverter GeneratorYour Pick | Inverter | 5,500 W | 7,000 W | Gas / propane | Yes | 8 hrs | Sold out |
| DuroMax XP13750HXYour Pick | Portable | 11,000 W | 13,750 W | Gas / propane | Yes | 11 hrs | $1,699.00 |
| Firman T09376 Tri-Fuel 9300W/11600W Portable GeneratorYour Pick | Portable | 9,300 W | 11,600 W | Gas / propane / natural gas | Yes | â | $1,699.99 |
| Cummins Onan P9500DF EFI Dual Fuel 7500W/9500W GeneratorYour Pick | Portable | 7,500 W | 9,500 W | Gas / propane | Yes | 11 hrs | $1,700.00 |
| Firman P08008 Gasoline 8000W/10000W Portable GeneratorYour Pick | Portable | 8,000 W | 10,000 W | Gas | Yes | â | $1,729.99 |
| Anker SOLIX Tri-Fuel 4500W/5500W Smart Generator 5500Your Pick | Inverter | 3,600 W | 5,500 W | Gas / propane / natural gas | 120V | â | $1,799.00 |
| Firman H08052 Dual Fuel 8000W/10000W Portable GeneratorYour Pick | Portable | 8,000 W | 10,000 W | Gas / propane | Yes | 12 hrs | $1,799.99 |
| DuroMax XP15000HXYour Pick | Portable | 12,000 W | 15,000 W | Gas / propane | Yes | 12 hrs | Sold out |
| Firman T09275 Tri-Fuel 9200W/11400W Portable GeneratorYour Pick | Portable | 9,200 W | 11,400 W | Gas / propane / natural gas | Yes | â | $1,899.99 |
| Firman T09371 Tri-Fuel 9300W/11600W Portable GeneratorYour Pick | Portable | 9,300 W | 11,600 W | Gas / propane / natural gas | Yes | 11 hrs | $1,949.99 |
| DuroMax XP13750HXTYour Pick | Portable | 11,000 W | 13,750 W | Gas / propane / natural gas | Yes | 11 hrs | $1,999.00 |
| DuroMax XP9500iHYour Pick | Inverter | 7,600 W | 9,500 W | Gas / propane | Yes | 11 hrs | $2,069.41 |
| Firman W06383 Gasoline 6300W/7850W Inverter Portable GeneratorYour Pick | Inverter | 6,300 W | 7,850 W | Gas | Yes | â | $2,099.99 |
| Firman W05583 Gasoline 5500W/6850W Inverter Portable GeneratorYour Pick | Inverter | 5,500 W | 6,850 W | Gas | Yes | â | $2,199.99 |
| Firman WT06873 Tri-Fuel 6800W/8500W Inverter Portable GeneratorYour Pick | Inverter | 6,800 W | 8,500 W | Gas / propane / natural gas | Yes | â | $2,299.99 |
| Firman WT06375 Tri-Fuel 6300W/7850W Inverter Portable GeneratorYour Pick | Inverter | 6,300 W | 7,850 W | Gas / propane / natural gas | Yes | â | $2,299.99 |
| Firman WT07071 Tri-Fuel 7000W/8750W Inverter Portable GeneratorYour Pick | Inverter | 7,000 W | 8,750 W | Gas / propane / natural gas | Yes | â | $2,339.99 |
| Cummins Onan P11000iTF 9000W/11000W Tri-Fuel Portable Inverter GeneratorYour Pick | Inverter | 9,000 W | 11,000 W | Gas / propane / natural gas | Yes | â | Sold out |
| DuroMax XP11000iHYour Pick | Inverter | 9,000 W | 11,000 W | Gas / propane | Yes | 9 hrs | $2,481.18 |
| DuroMax XP15000HXT Tri-Fuel 12000W/15000W Portable GeneratorYour Pick | Portable | 12,000 W | 15,000 W | Gas / propane / natural gas | Yes | 12 hrs | Sold out |
| DuroMax XP13500iH Dual Fuel 10500W/13500W Portable Inverter GeneratorYour Pick | Inverter | 10,500 W | 13,500 W | Gas / propane | Yes | 10.8 hrs | Sold out |
| Firman WT12579 Tri-Fuel 10000W/12500W Inverter Portable GeneratorYour Pick | Inverter | 10,000 W | 12,500 W | Gas / propane / natural gas | Yes | â | $2,749.99 |
| DuroMax XP11000iHT Tri-Fuel 9000W/11000W Portable Inverter GeneratorYour Pick | Inverter | 9,000 W | 11,000 W | Gas / propane / natural gas | Yes | 9 hrs | $2,882.35 |
| DuroMax XP13500iHT Tri-Fuel 10500W/13500W Portable Inverter GeneratorYour Pick | Inverter | 10,500 W | 13,500 W | Gas / propane / natural gas | Yes | 10.8 hrs | Sold out |
| DuroMax XP15000HXT+ Tri-Fuel 12000W/15000W EFI Portable GeneratorYour Pick | Portable | 12,000 W | 15,000 W | Gas / propane / natural gas | Yes | 12 hrs | $3,375.29 |
| Generac Next-Gen 10kWYour Pick | Home standby | 9,000 W | Not listed | Natural gas / propane | Yes | Gas line | $3,916.59 |
| Generac GP15500EFI Gasoline 15500W/19300W Portable GeneratorYour Pick | Portable | 15,500 W | 19,300 W | Gas | Yes | 11 hrs | $4,467.18 |
| Generac XD5000E Diesel 5000W/5500W Portable GeneratorYour Pick | Portable | 5,000 W | 5,500 W | Diesel | Yes | 32 hrs | $4,498.95 |
| Generac GP18000EFI Gasoline 18000W/22500W Portable GeneratorYour Pick | Portable | 18,000 W | 22,500 W | Gas | Yes | 9 hrs | $4,657.77 |
| Firman T13071 Tri-Fuel 13500W/16800W Portable GeneratorYour Pick | Portable | 13,500 W | 16,800 W | Gas / propane / natural gas | Yes | â | $4,699.99 |
| Generac Next-Gen 14kWYour Pick | Home standby | 14,000 W | Not listed | Natural gas / propane | Yes | Gas line | $5,081.30 |
| DuroMax XP16000iH Dual Fuel 13000W/16000W Portable Inverter GeneratorYour Pick | Inverter | 13,000 W | 16,000 W | Gas / propane | Yes | 10.5 hrs | $5,175.29 |
| DuroMax XP16000iHT Tri-Fuel 13000W/16000W Portable Inverter GeneratorYour Pick | Inverter | 13,000 W | 16,000 W | Gas / propane / natural gas | Yes | 10.5 hrs | $5,485.88 |
| Generac Next-Gen 18kWYour Pick | Home standby | 17,000 W | Not listed | Natural gas / propane | Yes | Gas line | $5,928.36 |
| Generac Next-Gen 22kWYour Pick | Home standby | 21,000 W | Not listed | Natural gas / propane | Yes | Gas line | $6,553.06 |
| Generac Next-Gen 24kWYour Pick | Home standby | 22,500 W | Not listed | Natural gas / propane | Yes | Gas line | $6,987.18 |
| DuroMax XP28000iH Dual Fuel 22000W/28000W Portable Inverter GeneratorYour Pick | Inverter | 22,000 W | 28,000 W | Gas / propane | Yes | 9 hrs | $7,234.12 |
| Generac Next-Gen 26kWYour Pick | Home standby | 24,000 W | Not listed | Natural gas / propane | Yes | Gas line | $7,431.89 |
| DuroMax XP28000iHT Tri-Fuel 22000W/28000W Portable Inverter GeneratorYour Pick | Inverter | 22,000 W | 28,000 W | Gas / propane / natural gas | Yes | 9 hrs | $7,647.06 |
| Generac Next-Gen 28kWYour Pick | Home standby | 25,000 W | Not listed | Natural gas / propane | Yes | Gas line | $8,469.53 |
Runtime is per tank at half load on gasoline. Standby prices are for the generator; the transfer switch and installation are extra.
Get a Free System Plan
Send us your list and how long you need power. Our team will check the numbers and recommend a system that fits.
What Happens Next
- Send Your DetailsIf you used the calculator, your results go into the form for you.
- We Check Your NumbersOur team reviews your appliances, runtime and recharging plan.
- Get Your PlanWe reply with a recommended system and a quote. No obligation.
Prefer to talk? Call or text 1-888-976-5443
MondayâFriday, 8:00 a.m.â4:00 p.m. AZ MST
How to Size a Power Station or Solar Generator
The calculator does these four steps for you. Here's what it's doing.
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Add Up Your Daily Energy
Multiply each appliance's watts by the hours it runs each day and by how many you have, then add them up. That's your daily energy in watt-hours (Wh). A 150 W refrigerator compressor that runs 8 hours a day uses 1,200 Wh.
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Find the Output You Need
Add the watts of everything that runs at the same time. That sets the continuous output in watts (W), or a generator's running watts. A cushion on top keeps the system from running at its limit.
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Check the Start-Up Surge
Motors in refrigerators, pumps, air conditioners and compressors draw several times their running watts for a moment when they start. A power station's surge rating, or a generator's starting watts, has to cover that spike.
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Size the Battery and Solar
The battery has to hold your daily energy for the hours or days you need, plus the cushion and about 15% for inverter losses. Solar has to replace one day of energy in your peak sun hours, at about 75% system efficiency. Generators skip this step, because fuel sets how long they run.
Power System Sizing Questions
What size power station do I need?
Start with two numbers: the watts of everything you'll run at the same time, and the watt-hours you use each day. The output (W) has to cover the first, and the battery (Wh) has to cover the second for as long as you need power. The calculator above works out both and matches you to units that fit.
Should I choose a power station or a generator?
Power stations are quiet, give off no fumes and can run indoors. They recharge from a wall outlet, a car or solar panels. Generators run on gas, propane or natural gas and keep going as long as they have fuel, which suits long outages, big loads and jobsites. Portable and inverter generators must run outdoors, away from windows and doors. A home standby generator is installed outside and starts on its own when the power goes out.
What size generator do I need?
Add the running watts of everything you'll run at the same time, and make sure the generator's running watts cover that total. Then check that its starting watts cover the start-up surge of your biggest motor, such as a well pump or air conditioner. The calculator does both and shows generators that fit.
What's the difference between watts and watt-hours?
Watts measure how much power an appliance draws at one moment. Watt-hours measure how much energy it uses over time. A 100 W TV running for 3 hours uses 300 Wh. A power station's output is rated in watts, and its battery is rated in watt-hours.
Why does start-up surge matter?
Appliances with motors or compressors, like refrigerators, well pumps and air conditioners, draw a short burst of extra power when they start. If the power station's surge rating is too low, it can shut off when that appliance kicks on. Check the surge or peak rating as well as the continuous output.
How long will a power station run a refrigerator?
A typical refrigerator uses about 150 W while its compressor runs, roughly 8 hours a day, or about 1,200 Wh a day. A 2,048 Wh power station delivers about 1,740 Wh at the outlet after inverter losses, so it would run that refrigerator for about 35 hours. Your refrigerator's label gives a closer number.
Can a power station run a central air conditioner or well pump?
Many central air conditioners, well pumps, electric dryers and water heaters run on 240V and have large start-up surges. They need a system with 120V/240V output and enough surge capacity, and connecting them to your home usually means a transfer switch or panel installed by an electrician. Add them to the calculator to see which units fit, or ask us to size it for you.
How many solar panels do I need?
Divide your daily energy use by your peak sun hours, then allow about 25% for system losses. For 2,000 Wh a day with 4.5 peak sun hours, that's about 600 W of solar, such as three 200 W panels. Make sure the power station's solar input rating can take that much.
Can you help me design a bigger system?
Yes. If your list needs more than one portable unit, or you want whole-home backup, send us your details with the form above or call 1-888-976-5443. Our team will recommend a system and send a free, no-obligation plan.