# Holdvolt

> Holdvolt makes industrial, online double-conversion, modular and lithium-ion uninterruptible power supply (UPS) systems from 1 to 800 kVA, plus batteries and battery monitoring, at its own factory in Nantong, Jiangsu, China (R&D in Nanjing). The high-frequency online range (1-600 kVA) is CE tested to EN IEC 62040-1 and EN IEC 62040-2. Already exported to Indonesia, the Philippines and Singapore. OEM / ODM available.

Contact: sales@holdvolt.com. Quotes need: load (kVA or kW), input voltage and phases, output phases, backup time, site conditions.

## Online UPS

- [Single-phase online UPS, 1-10 kVA](https://holdvolt.com/online-ups/single-phase-online-ups/): H11. H11 single-phase online double-conversion UPS, 1 to 10 kVA. Output PF 1, 0 ms transfer, 110-300 VAC input, standard and long-run models. CE tested.
- [Rack-mount online UPS, 1-40 kVA](https://holdvolt.com/online-ups/rack-mount-online-ups/): H11R / H31R / H33R. Rack-mount online double-conversion UPS for 19-inch cabinets: single-phase 1-10 kVA, three-in single-out 10-20 kVA and three-phase 10-40 kVA.
- [Three-in, single-out online UPS, 10-30 kVA](https://holdvolt.com/online-ups/3-in-1-out-online-ups/): H31. H31 online UPS with three-phase input and single-phase 220 VAC output, 10 to 30 kVA. 0 ms transfer, >=95.5% efficiency, ECO 98.5%. CE tested.
- [Three-phase online UPS, 10-600 kVA](https://holdvolt.com/online-ups/three-phase-online-ups/): H33. H33 three-phase online double-conversion UPS from 10 to 600 kVA. 0 ms transfer, 95.5% efficiency, ECO 98.5%, 4-unit parallel. CE tested to 600 kVA.
- [Online UPS for medical equipment, 1-10 kVA](https://holdvolt.com/online-ups/medical-grade-online-ups/): H11-MD. Single-phase online UPS for hospital and laboratory equipment, 1 to 10 kVA. 0 ms transfer, pure sine wave, low-noise operation for imaging and monitors.

## Modular UPS

- [Modular online UPS, 20-600 kVA](https://holdvolt.com/modular-ups/modular-online-ups/): M33. M33 modular online UPS: 20, 30 or 50 kVA hot-swap power modules in one cabinet, systems from 20 to 600 kVA, N+X redundancy and touch-screen control.
- [Rack-mount modular UPS, 10-200 kVA](https://holdvolt.com/modular-ups/rack-mount-modular-ups/): M33R. M33R rack-mount modular online UPS, 10 to 200 kVA, with hot-swap power modules in a standard cabinet for server rooms and edge sites. Specifications on request.

## Lithium-ion UPS

- [Single-phase lithium-ion UPS, 1-10 kVA](https://holdvolt.com/lithium-ion-ups/single-phase-lithium-ion-ups/): H11-Li. H11-Li single-phase rack-mount online UPS with LiFePO4 battery, 1 to 10 kVA. Output PF 1, 0 ms transfer, 94.5% AC efficiency, ECO mode 98%.
- [Three-phase rack lithium-ion UPS, 10-60 kVA](https://holdvolt.com/lithium-ion-ups/three-phase-rack-lithium-ion-ups/): H33R-Li. H33R-Li three-phase rack-mount online UPS with lithium battery, 10 to 60 kVA. 3U chassis, 95.5% efficiency, ECO 98.5%, four units in parallel.
- [High-power lithium-ion UPS, 200-600 kVA](https://holdvolt.com/lithium-ion-ups/high-power-lithium-ion-ups/): H33-Li. H33-Li online UPS cabinet for lithium battery systems, 200 to 600 kVA. Output PF 1, system efficiency >=97%, 7-inch display, 30-50 cell battery string.
- [All-in-one lithium UPS, 1.5 kVA](https://holdvolt.com/lithium-ion-ups/all-in-one-lithium-ups/): H11-1.5K-Li. Compact 1.5 kVA / 1.2 kW online UPS with a built-in LiFePO4 battery in one housing, for desks, network corners, POS and small medical devices.

## Industrial UPS

- [Single-phase industrial UPS, 1-40 kVA](https://holdvolt.com/industrial-ups/single-phase-industrial-ups/): X11. X11 transformer-based single-phase industrial UPS, 1 to 40 kVA, with output isolation transformer, 0 ms transfer and -10 to 50  degC operating range.
- [Three-in, single-out industrial UPS, 6-120 kVA](https://holdvolt.com/industrial-ups/3-in-1-out-industrial-ups/): X31. X31 transformer-based industrial UPS with three-phase input and single-phase output, 6 to 120 kVA, output isolation transformer and 0 ms transfer.
- [Three-phase industrial UPS, 10-200 kVA](https://holdvolt.com/industrial-ups/three-phase-industrial-ups/): X33. X33 transformer-based three-phase industrial UPS, 10 to 200 kVA, with output isolation transformer, 6- or 12-pulse rectifier options and touch screen.
- [High-power industrial UPS, 300-800 kVA](https://holdvolt.com/industrial-ups/high-power-industrial-ups/): X33. X33 high-power transformer-based UPS, 300 to 800 kVA, 6- or 12-pulse rectifier, output isolation transformer, ECO mode to 98%. Built to project spec.
- [Power-utility UPS, 1-120 kVA](https://holdvolt.com/industrial-ups/power-utility-ups/): P11 / P31 / P33. P-series transformer-based UPS for substations and power plants, 1 to 120 kVA, running from the station DC 110 V or 220 V battery. <=1 ms bypass transfer.

## Batteries & Monitoring

- [LiFePO4 rack battery, 48 V - 576 V](https://holdvolt.com/batteries/lifepo4-rack-battery/): L48 / L51 / L144-L576. Lithium iron phosphate rack batteries for UPS and telecom, 48 V and 51.2 V from 20 to 200 Ah, plus high-voltage cabinets from 144 to 576 V.
- [VRLA battery, 12 V, 24-250 Ah](https://holdvolt.com/batteries/vrla-battery/): B12. B12 maintenance-free valve-regulated lead-acid batteries for UPS systems, 12 V from 24 to 250 Ah, with full discharge tables at 20, 10 and 3-hour rates.
- [Battery monitoring system, 2 V / 6 V / 12 V cells](https://holdvolt.com/batteries/battery-monitoring-system/): BM. Online battery monitoring for UPS battery strings: cell voltage, internal resistance and temperature for 2 V, 6 V and 12 V cells, up to 300 cells per group.

## Energy Storage

- [All-in-one energy storage, 3 kW / 5.1 kWh](https://holdvolt.com/energy-storage/all-in-one-energy-storage/): ES. All-in-one energy storage with a 3 kW pure sine inverter, 2.2 kW MPPT solar charger and 5.1 kWh LiFePO4 battery in one cabinet, for shops and small sites.
- [Off-grid lithium battery, 12-30 kWh](https://holdvolt.com/energy-storage/off-grid-lithium-battery/): L51. LiFePO4 battery banks for off-grid solar, 51.2 V in 230, 300 and 600 Ah sizes (about 12 to 30 kWh), with BMS and touch-screen display.
- [Portable power station, 145 Wh - 5.4 kWh](https://holdvolt.com/energy-storage/portable-power-station/): PS. Portable lithium power stations from 145 Wh to 5.4 kWh, with AC outlets, USB, solar charging and a UPS function on larger models, for field work and backup.

## Systems & Accessories

- [Central battery system, 0.5-100 kVA](https://holdvolt.com/central-battery-system/): CB11 / CB33. Central battery systems that power emergency lighting and evacuation loads, single-phase 0.5-10 kVA and three-phase 5-100 kVA, 90 min standard autonomy.
- [Micro data center, Single- and dual-row](https://holdvolt.com/micro-data-center/): MDC. Single-row, dual-row and all-in-one micro data center cabinets with integrated UPS, power distribution, cable management and hot / cold aisle containment.
- [Monitoring cards, ](https://holdvolt.com/ups-accessories/): Cards. Monitoring accessories for our UPS range: SNMP network card, Modbus card, dry-contact relay card and a cloud monitoring terminal for remote sites.

## Applications

- [Manufacturing](https://holdvolt.com/applications/manufacturing/): A half-second dip can stop a line, scrap a batch and reset every PLC. We size industrial and online UPS systems for controls, drives and process loads, not just the office IT room.
- [Oil, Gas and Petrochemical](https://holdvolt.com/applications/oil-and-gas-petrochemical/): Control systems, safety instrumentation and telemetry must stay powered through grid faults and generator changeovers. We build transformer-based UPS systems for the electrical and control rooms of process sites.
- [Power Substations](https://holdvolt.com/applications/power-substations/): Relays, SCADA, RTUs and communication equipment in a substation need clean AC power when station supply is disturbed. Our P-series power utility UPS is built for that control-room duty.
- [Data Centers](https://holdvolt.com/applications/data-centers/): Data center power has to grow with the racks and stay up while you service it. We supply modular, rack-mount and lithium-ion online UPS systems from server room to full data hall.
- [Healthcare](https://holdvolt.com/applications/healthcare/): Imaging systems, lab analyzers and hospital IT react badly to dips and outages. We size double-conversion online UPS systems for individual devices up to whole hospital wings.
- [Telecom](https://holdvolt.com/applications/telecom/): Telecom and network sites run unattended, often on unstable rural supplies. We supply rack-mount, modular and lithium-ion online UPS systems that keep links up and report problems remotely.
- [Transportation](https://holdvolt.com/applications/transportation/): Signalling, passenger information, ticketing and control centres must keep running when the supply fails. We supply industrial, modular and central battery systems for stations, depots and terminals.
- [Security and Surveillance](https://holdvolt.com/applications/security-and-surveillance/): Cameras, recorders and door controllers are spread across many small sites, each on its own supply. We supply compact online UPS units that keep recording and doors working through outages.

## Company

- [About and factory](https://holdvolt.com/about/)
- [OEM / ODM](https://holdvolt.com/oem-odm/)
- [Request a quote](https://holdvolt.com/contact/)

## Optional

- [Buying guides](https://holdvolt.com/guides/)
- [Downloads and CE certificates](https://holdvolt.com/downloads/)