48V Solar-First Transfer Switch
by MySite Energy
This Service Entrance rated 200A transfer switch provides solar-first power to loads, with automatic switching to utility power when battery voltage becomes low. Transfer voltage is adjustable using built-in digital voltmeter, that can display real-time battery voltage. Software settings are defined by user.
Also enables fire department to switch off the utility feed and solar inverter output power at one location. This is one of the few switches that ensure maximum protection to first responders.
The Intelligent Transfer Switch monitors the battery voltage and the AC voltage coming from the solar system. Excessive drop in battery voltage OR loss of AC power, will cause transfer to the incoming utility power.
The utility supply your home is maintained until the battery voltage returns AND the solar AC power resumes. When the solar system output resumes, the transfer switch automatically switches from utility power, back to the solar power.
Uses solar as primary source, and utility as backup
Simple 2-wire battery connection powers system controller and voltmeter
- Dual AC disconnects to disable utility and solar
Steel enclosure is NEMA 3R outdoor rated
200-amp, Volts: 240; Poles: 2
- RMS Symmetrical Amps at 240 VAC: 22,000A
- Dimensions: 28.9″ x 16.4″ x 6.9″, weight 63lbs
Solar-First transfer Switch, software controlled from 48V battery
Electrical diagram of Solar-First battery controlled transfer switch
System Battery Meter, software settings control transfer switch
Battery input connection, 10 ft connector wire