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VFDs 7.5 kW

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Batteries for Inverter — LiFePO4 energy storage for backup and off-grid power

An inverter battery is the core component of any backup or off-grid power system. Modern LiFePO4 batteries deliver stable energy output over 6,000+ cycles, withstand deep discharge down to 80% DoD, and integrate seamlessly with hybrid inverters and solar panels. Our catalog features models from 5 to 25 kWh at 48 V (51.2 V) nominal voltage — suitable for apartments, houses, and small commercial installations.

How to choose a battery for inverter

When selecting a lithium battery, consider your load capacity, desired backup runtime, and inverter compatibility. Below is a comparison of our top-selling models:

ModelCapacityVoltageCyclesApplication
Veichi VCLB-5K-D015.12 kWh51.2 V6,000Apartment, office
Felicity LPBA48100-OL5.12 kWh51.2 V6,000+Apartment, cottage
Felicity LPBA481708.7 kWh51.2 V6,000+House up to 150 m2
Veichi VCLB-10K-W0110.24 kWh51.2 V6,000House, small business
Rosen BAT-51.2V-200AH-WALL10.24 kWh51.2 V6,000+House, office

For an apartment, a 5 kWh battery is sufficient — providing 4 to 6 hours of runtime for a refrigerator, lighting, and router. For a house with electric heating or air conditioning, we recommend 10 kWh or more.

Inverter battery manufacturers

The chastotnik.ua catalog features brands with confirmed sales and official warranty in Ukraine:

  • Felicity — LiFePO4 lineup from 5.12 to 25 kWh; robust rack-mount and wall-mount enclosures; 6,000+ cycle life.
  • Veichi — compact wall-mount and floor-standing models 5–10 kWh with BMS and CAN/RS485 interfaces; temperature-controlled charging.
  • Rosen — rack-mount and wall-mount modules 5–10 kWh (BAT-51.2V-200AH-WALL, BAT-51.2V-200AH-RACK); built-in BMS with CAN and RS485 protocols for integration with most hybrid inverters.

Batteries for inverter by specifications

Warranty and support

All inverter batteries are sold with an official manufacturer warranty of 5 years or more. Chastotnik.ua is an authorized distributor of Veichi, Felicity, and Rosen in Ukraine. Delivery via Nova Poshta across Ukraine: Kyiv, Kharkiv, Odesa, Dnipro, Lviv, and other cities. Payment options: bank transfer for companies, card payment, or cash on delivery for individuals.

Frequently Asked Questions

Where is a 7.5 kW VFD used?

7.5 kW VFDs are used across industry: water supply and heating pump stations, HVAC systems, screw compressors, conveyor lines, woodworking machines, and shredders. This is one of the most popular power ratings for medium-scale manufacturing.

What current does a 7.5 kW VFD draw?

At 380V supply, the rated current of a 7.5 kW motor is approximately 15-17 A. The VFD must provide this current with margin. For heavy-duty starts (compressors, crushers), choose a VFD with 150% overload capacity for 60 seconds (HD mode).

What is the difference between ND and HD mode on a 7.5 kW VFD?

ND (Normal Duty) is for easy-start mechanisms: pumps, fans. Overload 120% for 60 s. HD (Heavy Duty) is for heavy starts: compressors, loaded conveyors. Overload 150% for 60 s. In HD mode, the same VFD is rated for lower power (typically 5.5 kW).

How much does a 7.5 kW VFD cost?

Prices range from UAH 12,842 (Simphoenix, INVT) to UAH 108,000+ (ABB, Siemens premium series). Mid-range is UAH 20,000-35,000 (Veichi, Delta, Schneider, Danfoss). Price depends on brand, series, EMC filter, and ingress protection rating.

What cable size is needed for a 7.5 kW VFD?

For a three-phase 7.5 kW VFD (380V, 15-18 A), the recommended power cable cross-section is 4 mm² (copper) for runs up to 30 m. For longer runs or high ambient temperatures, use 6 mm². Always use shielded cable to reduce electromagnetic interference.

Can a 7.5 kW VFD be connected to a single-phase 220V supply?

Yes, but single-phase input models at 7.5 kW are very limited (e.g., Veichi AC310-T/S2-7R5G-B). Input current will be higher — around 33 A. A 40 A breaker and cable of at least 10 mm² are required. For industrial sites, three-phase 380V supply is recommended.