Exide STAR 12V 850VA vs Microtek Super Power 900 (Pure Sine Wave)
Two 12 V home inverters of about the same size, side by side on the specs each maker states. They differ on rating.
- Specs from makers’ pages
- Backup worked out the same way for both
Side by side
“Not stated” means the maker’s page doesn’t give it, not that the inverter lacks it.
| Exide STAR 12V 850VA | Microtek Super Power 900 (Pure Sine Wave) | |
|---|---|---|
| Rating | 850 VA | 800 VA / 640 W |
| Battery | 12 V | 12 V |
| Output wave | Pure sine wave | Pure sine wave |
| Max charging current | 12 A | Not stated |
| Lithium support | Not stated | Not stated |
| Warranty | Not stated | 36 months |
| Comfortable load | 544 W | 512 W |
| Backup at 300 W, 1 × 150 Ah | 4 h 05 min | 4 h 05 min |
| Source | Exide product page | Microtek product page |
What actually differs
- Only Exide STAR 12V 850VA has the headroom for: 2 bhk home.
Which homes each one runs
From the running load of each set with a 25% margin, against each inverter’s VA.
| Home or load | Needs | Exide STAR 12V 850VA | Microtek Super Power 900 (Pure Sine Wave) |
|---|---|---|---|
| 1 BHK home | 431 VA | Yes | Yes |
| 2 BHK home | 811 VA | Yes | No |
| 3 BHK home | 1048 VA | No | No |
| 4 BHK or independent house | 1528 VA | No | No |
| Refrigerator | 263 VA | Yes | Yes |
| 1 HP water pump | 1200 VA | No | No |
| Air cooler | 728 VA | Yes | Yes |
| Work from home | 473 VA | Yes | Yes |
| Small shop | 609 VA | Yes | Yes |
| 1.5 ton AC | 2372 VA | No | No |
What each adds to your bill
At half its comfortable load. Standby is 1% of rated watts, an assumption: no Indian brand publishes it.
| Exide STAR 12V 850VA | Microtek Super Power 900 (Pure Sine Wave) | |
|---|---|---|
| Running 272 W / 256 W, 2 h of cuts a day | 30.4 units a month | 28.6 units a month |
| of which standby | 4.9 units | 4.6 units |
Backup
Backup depends on the battery, not the inverter brand: with the same batteries and load, both give about the same hours.