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660-800VAC Balance of System Equipment

Most Comprehensive Offerings / Up to 70% Domestic Content

EPEC has developed a comprehensive set of solutions available for 660-800VAC AC collection requirements. Our equipment is designed and manufactured in the United States and performs with all inverter brands and sizes (250/275/350kW) presently being sold in the USA. We realize that one size does not fit all though. Thus, we have crafted solutions for multiple power block/topology layouts. We illustrate this flexibility below. The following examples are based on a power block size of (4.2MVA), however, block size can reduce as required to meet exact solar plant requirements.

Main Switchboard / Inverters in Array / Local Disconnect

EPEC switchboard is located at the transformer (either cable or bus connected to MVT). MCCEt’s in the SWBD are cabled out to inverters mounted throughout the array. EPEC’s 800VAC NF disconnect provides required NEC local disconnecting means. Up to (12) 350kW inverters or up to (15) 275kW inverters are connected for a total power block size of 4.2MVA. Domestic content 55-60% for SWBD. If a skidded (MVT. SWBD) solution domestic content 70%

Main Switchboard (AC Recombines) / Field AC Combiner

EPEC modular (multi-section) switchboard is located at the transformer (either cable or bus connected to MVT). The switchboards utilize 800VAC rated air circuit breakers ACB (800A – 1200A). These (4) ACB’s are fed by field-mounted AC combiners, each of which can combine up to (3) 350kW inverters or (4) 275kW inverters for a total power block size of 4.2 MVA. Domestic content 70%, if skidded (MVT + SWBD) or integrated rack (AC combiner + INV) solution domestic content 80%.

Main Switchboard / Field Inverter Cluster with PICS 1000A

EPEC “main breaker only” switchboard is located at the transformer (either cable or bus connected to MVT). The load bus of the switchboard has load landing positions for up to 8x 1000MCM cables. Inverters are clustered in the field and combined with EPEC PICS 1000A fusible disconnect. Up to (d) Pia Units can combine up to (12) 350kW or (15) 275kW inverters for a total power block size of 4.2MVA. Domestic content 50%, if skidded (MVT + SWBD) or integrated rack (PICS + INV) solution domestic content 70%+.
660-800VAC Balance of System Equipment