July 22, 2024

40 Watt 24VAC Pure Sine Wave battery backup

12V direct current to 24VAC alternating current 40 Watt pure sine wave inverter

We also have 24VDC to 24VAC and 48VDC to 24VAC inverters.

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.

Quantity		1-10	11-100	101-500	501+
PST-UPS-24VAC-60Hz	40 watt UPS, 24VAC in, 24VAC out	$149	$135	$123	$ call
PST-UPS-24VAC-50Hz (allow 1-2 weeks)	50 Hz version	$149	$135	$123	$ call

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.
Tested with electronic thermostats, no loss of power when mains fail. No reset when the power comes back on.

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%
Switchover time	10 mS
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 plastic 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.

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Thank you for considering PowerStream

UPS 24VAC to 24vac, 12 VAC to 24 VAC battery backup, low voltage Uninterruptible power supply, 24VAC power backup, 24VAC 24VAC ups

PowerStream Technology 1163 South 1680 West Orem, Utah 84058 USA Phone: 801-764-9060 Fax: 801-764-9061
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