Samlex America ST1500-148 - Manual (Page 4)

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2. Functional Characteristics
2-1. General Information
ST-series consist of a stand–alone power inverter with built-in AC
Transfer
Switch and is suitable for RV, Marine and Emergency applications.
The following two separate optional versions of these units are available
(These are required to be ordered separately) :
Option 1
• Off-line Mode : The AC input power from the utility is the primary
source and the DC to AC inverter is the backup source. If AC input
power from the utility is available, it will be passed through to the AC
loads and the inverter will remain in the standby condition. If AC input
power from the utility fails, the AC loads will be transferred to the
inverter. When AC input power from the utility returns, the load will
once again be transferred back to the utility and the inverter will once
again remain in standby condition. This is the standard version.
Option 2
• On-line Mode : The AC power from the DC to AC inverter is the
primary AC power source and the utility AC power is the backup
source. If the DC source or the inverter fail, AC input power from the
utility will be passed through to the AC loads. Once the DC power
source is restored, the load will once again be transferred back to the
inverter. This is an optional version and has to be ordered
specifically.
WARNING!
The above two option are fixed during the production and
customer unable to modify.