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Automatic Transfer Switch
120VAC, 30 amp

Safely connect an inverter and an AC generator to the same house wiring.  Switch can be used with inverters that do not have built-in transfer switch capability.  If the generator is not running, the inverter is connected to the house wiring.  When the generator is started, the house wiring is automatically disconnected from the inverter and connected to the generator.  A time delay feature allows the generator to warm-up before the transfer takes place.  DC coils on relays eliminate chatter on low voltage.


Comparison with Other Transfer Switches
(some features not included can be added by user with additional auxiliary relays)

Feature ITS30R
Higher Cost Automatic Transfer Switches
Generator Capacity 30 amp (3.6 kW max) 200 amp (48 kW)
or larger
Generator output sensed before transfer Yes Yes
Time delay before loading generator Yes Yes
Under voltage sensing starts generator Not Included Yes
Automatic retransfer when utility restored No Yes
Automatic generator exerciser clock No Usually included
Engine battery trickle charger No Usually included
Short circuit rating Low Medium-High
Factory Warranty 2 years
1 year
Dimensions (L x W x D) 7.5" x 8.5" x 4"
8.5" x 8.5" x 4.5"
7.25" x 8.37" x 4.0"


Iota ITS30R Esco LPT30BRD
Progressive Dynamics PD5110010