V-Guard Synergy Smart 3750: what it runs and for how long
V-Guard’s 3200 VA, 36 V home inverter: the specs the maker states, the load it handles, and backup with common batteries.
- 3200 VA
- Runs up to about 2040 W comfortably
- 36 V battery
Specifications
As stated on the manufacturer’s page, read on 15 October 2026.
| Brand | V-Guard |
|---|---|
| Model | Synergy Smart 3750 |
| Rating | 3200 VA / 2550 W |
| Battery voltage | 36 V (3 batteries) |
| Output wave | Pure sine wave |
| Maximum charging current | 12 A |
| Lithium battery support | Not stated |
| Solar charging | Not stated |
| Warranty | 24 months |
| Source | V-Guard brochure (2021) Ratings from the 2021 brochure; the model is still listed on vguard.in. |
What it can run
Keep the running load under about 2040 W: that is its rated 2550 W less a 25% margin for motors starting and battery sag. Home sets it covers:
Backup with 3 × 150 Ah tubular
| Load | Backup |
|---|---|
| 100 W | 43 h 10 min |
| 200 W | 21 h 35 min |
| 300 W | 14 h 25 min |
| 400 W | 10 h 50 min |
| 500 W | 8 h 25 min |
| 600 W | 6 h 50 min |
| 800 W | 4 h 50 min |
| 1000 W | 3 h 35 min |
| 1200 W | 2 h 50 min |
| 1500 W | 2 h |
| 2040 W | 1 h 10 min |
Backup with other battery sizes
| Load | 3 × 100 Ah | 3 × 150 Ah | 3 × 200 Ah |
|---|---|---|---|
| 100 W | 28 h 50 min | 43 h 10 min | 57 h 35 min |
| 200 W | 14 h 25 min | 21 h 35 min | 28 h 50 min |
| 300 W | 9 h 30 min | 14 h 25 min | 19 h 10 min |
| 400 W | 6 h 50 min | 10 h 50 min | 14 h 25 min |
| 500 W | 5 h 10 min | 8 h 25 min | 11 h 30 min |
| 600 W | 4 h 05 min | 6 h 50 min | 9 h 30 min |
| 800 W | 2 h 50 min | 4 h 50 min | 6 h 50 min |
| 1000 W | 2 h | 3 h 35 min | 5 h 10 min |
| 1200 W | 1 h 25 min | 2 h 50 min | 4 h 05 min |
| 1500 W | 1 h 05 min | 2 h | 3 h |
| 2040 W | 50 min | 1 h 10 min | 1 h 55 min |
What it adds to your bill
Running 1020 W through two hours of cuts a day adds about 114 units a month to your bill: 95.6 to recharge the battery and 18.4 for standby. See it at your state’s rates in the inverter calculator.
Batteries for this inverter
It takes 3 × 12 V battery in series. Tubular batteries of 100 to 220 Ah.