SPF T HVM/DVM off-grid inverter with a low-frequency transformer, 3–18 kW
Country: China · Model: SPF T HVM/DVM
The SPF T HVM/DVM off-grid inverter with a built-in low-frequency transformer is available from 3 to 18 kW and runs from a 48 V battery. It briefly delivers three times its rating, so it is used where pumps, compressors and other motors start.
- Power
- 3–18 kW
- Peak power
- 3× rated (9–36 kW)
- Battery
- 48 V
- Output
- 208–240 V (HVM) or 120/240 V split-phase (DVM)
Technical specifications
| Power | 3–18 kW |
|---|---|
| Peak power | 3× rated (9–36 kW) |
| Battery | 48 V |
| Output | 208–240 V (HVM) or 120/240 V split-phase (DVM) |
| Transformer | built-in low-frequency, copper |
| Efficiency | up to 94 % |
| Parallel | up to 6 units, single-phase and three-phase systems |
| Customs codes (for reference) | |
| HS code | 8504.40 |
| UKTZED code (Ukraine) | 8504408400 (≤7.5 kVA); 8504408800 (>7.5 kVA) |
| CN code (EU) | 85044087 |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
The copper low-frequency transformer is heavier than a transformerless design, but it is what takes the inrush currents and galvanically separates the battery circuit from the AC output. The peak power is 3× rated, which the manufacturer gives as 9–36 kW for the range. The HVM version delivers 208–240 V, the single-phase voltage usual in Ukraine, while the DVM forms 120/240 V split-phase in the North American scheme. The efficiency reaches 94 %. Up to 6 units are connected in parallel to make a single-phase system of higher power or a three-phase one for a farm or workshop. The 48 V battery bus limits the current in the battery cables, but on the larger models it is still significant, so cross-sections and fuses are calculated for full power.
How to choose
The main selection criterion is the nature of the load. If the loads include a borehole pump, a compressor or a woodworking machine, take the SPF T with its threefold peak power margin. For lighting, household appliances and a boiler, the transformerless SPF ES of 3500–6000 VA with a 2× peak or the compact SPF TL of 2000–5000 VA with a 24 or 48 V battery is enough. When the site has a grid connection and needs joint operation with it and a generator, look at the hybrid SPE of 3.5–12 kW or the three-phase WIT.
Request a price and lead time
SPF T HVM/DVM off-grid inverter with a low-frequency transformer, 3–18 kW. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Can the SPF T start a borehole pump?
The inverter has a peak power of 3× rated and a low-frequency transformer designed for inrush currents. The model is chosen so that the pump starting current fits within this margin.
How do the SPF T HVM and DVM versions differ?
The HVM delivers 208–240 V for a single-phase network, and the DVM forms 120/240 V split-phase. For Ukrainian sites the HVM is used.
How many SPF T inverters can be connected in parallel?
Up to 6 units work in parallel. They can form either a higher-power single-phase system or a three-phase one.
What battery does the SPF T HVM need?
The inverter works with a 48 V battery bus. The bank capacity is calculated from the load power and the desired autonomy time.
What is the efficiency of the SPF T transformer inverter?
The maximum efficiency is up to 94 %, so the transformer design here does not lose to the transformerless SPF TL and SPF ES with their 93 %.
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