60 kW dairy farm solar PV system
This dairy farm solar PV single line diagram maps a 60 kWdc rooftop installation across two barn-facing array blocks. Both array outputs meet at a string combiner and DC isolator before a three-phase inverter feeds the 480Y/277 V farm main distribution. The same board supplies the operational loads and receives utility power through a bidirectional meter.
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Scenario
A dairy operator is adding roof-mounted PV to offset daytime milking and refrigeration demand at a three-phase service.
Key decisions
- Two 30 kWdc arrays combine before the 1000 Vdc isolator.
- A 50 kWac inverter converts the DC output for the 480Y/277 V board.
- The PV feeder uses a 100 A, 25 kA breaker at the farm distribution.
- The bidirectional meter sits between utility supply and the main board.
When to reuse this
This arrangement suits a modest agricultural facility with a single interconnected service. A final design needs utility export approval and a load study for motor starting demand.
Frequently asked questions
Why use 480Y/277 V?
What does the bidirectional meter record?
Can the PV run during a utility outage?
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