Romoss Thunder Series 400WH Power Station

The Romoss THUNDER Series RS500 400Wh Power Station gives you power on the go in a compact and portable design. Ideal for power outages, camping trips or emergencies, this convenient portable power station allows you to provide power to smaller devices and appliances making it perfect for loadshedding. You can power your router, lightbulbs, and other small electronics and appliances easily thanks to its 230V South African plug.


  • 400Wh Ternary Lithium Battery
  • Ideal to keep electronic appliances powered during loadshedding or a power outage
  • Great for keeping essential gear powered during outdoor adventures
  • Features 6 outlets – a 230V South African 3-pin plug, a 60W PD port, 3 x USB ports, and a car socket port
  • 10W Fast Wireless Charging Pad on top
  • Multiple input charging options – draw power from your car, solar panel, or from wall sockets
  • Battery Management System proactively monitors and preserves battery life
  • Robust design and built-in rescue LED flashlight for convenience
  • Intelligent safety features like over-charge, over-discharge, and short circuit protection


1 in stock

Romoss Thunder Series 400WH Power Station

It also features three USB ports as well as one 60W PD port to keep your phone, tablet, camera, or notebook charged. It also comes with a handy 10W fast wireless charging pad on top of the power station for any compatible mobile wireless charging devices. Featuring a robust design with a PC+ABS alloy shell for protection, this portable power station also comes with a built-in LED flashlight for emergencies. The Romoss THUNDER RS500 is also easy to charge via either solar power charging, a car charger, or traditional wall charging.

Get off the grid and enjoy the great outdoors while keeping essential gear and mobile devices powered. Thanks to the six outlets, including a South African plug, you can power lights, smartphones, cameras, and other small electronics with ease. You can also easily recharge the Romoss RS500 during your outdoor adventures.

Note: The maximum concurrent rated output for this device is 500W. Please double-check the watt requirement of the appliance you want to power before connecting it to your Romoss Power Station.


  • Inverter: Pure Sine Wave
  • Battery Capacity: 400Wh (18Ah/22.2V) 108000mAh (3.7V)
  • DC7909 Input Port: Adapter 12-28V (100W Max), Solar Panel 12-28V (100W Max), Car Charger 12V (60W Max)
  • AC Output: 220V – 50Hz rated power at 500W, peak power at 1000W
  • Type-C Output: 5V-3A / 9V-3A / 12V-3A / 15V-3A / 20V-3A (60W Max)
  • USB-A Single-port Output x 3: 5V-3.4A / 9V-2A / 12V-1.5A (18W Max)
  • Car Charging Output: 12V-10A (120W Max)
  • Wireless Charging Output: 10W
  • Power Station Recharge Time (100W Solar Panel): 4 hours
  • Power Station Recharge Time (100W Wall Charger): 4 hours
  • Power Station Recharge Time (60W Car Charger): 6.7 hours
  • LED Display: SoC Liquid-crystal Display
  • LED Flashlight: 1W
  • Battery Life Cycle: 800+
  • Work Temperature: -10~40°C
  • Product Dimensions: 23 x 16.8 x 17.8 cm
  • Product Weight: 4270g


  • Heat Protection
  • Freeze Protection
  • Over-discharge Protection
  • Overload Protection
  • Short-circuit Protection
  • Over-voltage Protection
  • Over-current Protection
  • Battery Malfunction Protection


  • Smart Phone (3500mAh): 26.9
  • Tablet (7000mAh): 13.4
  • Portable Speaker (7500mAh): 12.5
  • Action Camera (1250mAh): 75.5


  • ONU (3W): 133
  • Router (10W): 40
  • CCTV Cameras (10W): 40


  • Romoss THUNDER Series RS500 400Wh Power Station – Black x1
  • Power Cable x1
  • Car Charging Cable x1
  • User Manual x1
SKU RS500-2B2-G1C3H
Brand Romoss
Tech IT Warranty Limited 1 year warranty

Additional information

Weight 4270 kg
Dimensions 23 × 17 × 18 cm


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