Luminous Optimus 1250 inverter and the Red Charge 150Ah
The combination of the Luminous Optimus 1250 inverter and the Red Charge RC 18000 battery is a popular, high-performance setup for homes and small offices.
Here is a breakdown of how these two components work together:
### Technical Specifications
| Feature | Optimus 1250 (Inverter) | RC 18000 (Battery
| Capacity | 1100 VA / 12V | 150 Ah |
| Rated Power | 924 Watts | — |
| Technology | Pure Sine Wave | Tall Tubular |
| Display | Advanced LCD (Real-time stats) | 6 Water Level Indicators |
| Warranty | 24–36 Months | 36–48 Months (varies by "Pro" model) |
### Performance Highlights
* Pure Sine Wave: The Optimus 1250 provides "grid-like" power, making it safe for sensitive electronics like laptops, LED TVs, and high-end fans without humming noises.
* High Load Capacity: With a 924W rated power, it can easily handle a 250L refrigerator along with basic lights and fans during a power cut.
* Smart LCD Display: One of the best features of the Optimus series is the screen, which shows exactly how many hours of backup you have left based on your current usage.
* Low Voltage Charging: The inverter can start charging the battery even when the input grid voltage is as low as 95V, which is excellent for areas with poor power quality.
### Estimated Backup Time (with 150Ah Battery)
Your actual backup will depend on the total wattage of the appliances you run:
* Light Load (~150W): 8 – 10 hours (e.g., 3 fans, 4 LED bulbs, 1 WiFi router)
* Medium Load (~400W): 3 – 4 hours (e.g., 1 LED TV, 3 fans, 5 bulbs, 1 laptop)
* Heavy Load (~700W): 1.5 – 2 hours (e.g., Refrigerator + TV + multiple fans/lights)
### Maintenance Tips
* Distilled Water: Check the float indicators on the RC 18000 every 3 months. Only top up with distilled water—never tap water or acid.
* Ventilation: Ensure the battery is kept in a well-ventilated area or a dedicated inverter trolley to prevent overheating.
* Charging Current: On the back of the Optimus 1250, you can set the charging current. For the 150Ah RC 18000, it is usually recommended to set it between 14A and 18A for optimal charging speed.
Would you like me to calculate the specific backup time for your list of appliances
