40 Watt 24VAC Pure Sine Wave battery backup

Single Pulse Resistance Welder Unique system takes 24VAC input, charges an external 12V battery and supplies 24VAC uninterrupted in case of power failure, Can be used with CCTV, security, and 24VAC irrigation systems. Could even provide battery backup for 24VAC doorbells.
link to 12V DC to 24VAC alternating current 40 Watt pure sine wave inverter 12V to 24VAC inverters We also have 24VDC to 24VAC and 48VDC to 24VAC inverters.
PST-UPS-24VAC-60Hz
40 watt UPS, 24VAC in, 24VAC out
$149 Add to Cart
PST-UPS-24VAC-50Hz (allow 1-2 weeks)
50 Hz version
$149 Add to Cart

This is a handy low voltage Uninterruptible power supply (UPS) which accepts 24VAC, charges a 12 volt sealed lead acid battery, and converts to 24VAC. This is a single conversion unit. When AC is available from the ‘mains’ that is passed directly to the output, so the output does not come from the inverter. When the ‘mains’ drops out the inverter takes over. The battery is not included in the box, and can be any size that makes sense for your system. The output 24 volt AC inverter is rated at 40 watts for use with CCTV, security, and other low voltage installations. It basically provides an easy to use battery back-up for 24VAC.

PST-UPS-24VAC

Function: 24VAC UPS battery backup

Input power

24VAC 24VAC allows the UPS to be remotely located by powering it off the 24VAC system

Output power

40VA continuous (40 Watts) (24VAC 1.6Amps nominal) 50VA for 1 minute at 50% duty factor( 1 minute above 40VAC, one minute below 40VA

Output Current

1.6 Amps continuous, 2 amps peak

Input voltage

DC 24VAC Nominal

Input voltage range

19VAC to 28VAC

Output voltage

AC 24VAC

Output voltage regulation

±15%

Output wave form

Pure sine wave

Output frequency

60Hz± 1% or 50Hz ± 1%

Standby current

0.2A, 200 mA typical

Battery Charge Current

1.1 Amps

Battery Size Backup time

This can be used with any size 12V sealed lead acid battery. At full power the backup time from a 7AH battery would be about 75 minutes

Cooling

Convection cooling, no fan

Protections

Polarity reverse Under voltage input

Under voltage protection

Unit will go into UPS mode when the input voltage falls below 19VAC

DC Input

Screw terminals

Mechanical Format

Custom polymer case

AC output

Screw Terminals

Annunciation

There is a dry-relay contact that closes when the unit is on mains power

Isolation

DC input from the battery is galvanically isolated from the AC output, greater than 100V hipot

Dimensions

79 x 45 x 180 mm including flanges 3.1 x 1.75 x 7.1 inches including flanges

Drawing
Weight

10.9 oz., 300 grams

Advantages:
  • UPS with 24VAC input and 24VAC pure sine wave output
  • Makes 24 VAC equipment usable in case of AC failure. 24VAC inverter can also work with solar or other sources of 12VDC.
  • Useful for powered security systems, 24VAC irrigation systems and CCTV systems.
  • The 24VAC voltage output is regulated, so it is independent of power drawn. Transformers are not voltage regulated, which makes this inverter a better power source than AC mains.