Solar + 500 kWh storage system designed around demand-charge management. Storage discharges during peak windows; demand-charge reduction pays back in under 7 years.
Specialty metal-fabrication manufacturer with predictable shift schedule but high demand charges — peaks of ~850 kW on hot summer afternoons drove the demand-charge line above $17,000/month. Solar alone wouldn't dent it because cloud cover dropped output during peak windows. Owner wanted both kWh savings AND demand reduction.
Solar + 500 kWh lithium battery storage paired through one EMS. Storage continuously monitors facility load and discharges to keep demand under 540 kW threshold. Solar charges the battery during sun hours; battery covers the gap when clouds hit. Storage qualified for the standalone-storage federal ITC.
Peak demand cut from 850 kW to 540 kW (37% reduction). Demand-charge savings: ~$74K/year on top of energy savings. Combined monthly bill reduction: ~50%. Storage standalone payback under 7 years even before counting solar synergies.
First peak summer with the system live and our utility bill was the lowest July I've seen in fifteen years. The storage is the unsung hero.
Testimonial pending client release
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