Technical Data Sheet

Microgrid Energy for Electricity Resilience and Savings

Sol Donum’s Vulcan Microgrid© system is a portable device that allows you to create a true off-grid (or “Islanded Microgrid”) solution that prioritizes energy from a variety of distributed energy sources (DER). It is designed to be a mobile microgrid solution to run appliance loads and keep batteries charged first using energy harvested from solar or other source inputs and use the grid only as a backup if needed. Generators with or without an electric-start feature can be integrated as an energy resource to run under specific load and/or battery capacity scenarios (e.g., when appliance loads exceed harvested energy and/or when battery capacity drops below 20%). Thereby, continuing to meet energy consumption needs during extended periods of limited PV harvesting.


If grid power is available, the Vulcan Microgrid© can also be configured to automatically cutover to the grid to run appliances and charge the batteries. By prioritizing these energy resources, customers can choose the Vulcan Microgrid© configuration to minimize or eliminate grid dependency for energy savings and maximize investments in existing fossil-fuel generators.

5kWh Vulcan system with parallel charging and 15A NEMA 5-15R service receptacles is illustrated

High Energy Capacity: 

Smaller footprint and more power. From 4KWh - 100kWh in less space than traditional battery systems. Built-in parallel charging circuitry ensures fast and consistent charge times.

Wide Operating Range: 

-20ºC/-4ºF to 50ºC/122ºF & IP50 enclosure. Built-in battery heating activates at 5ºC/41ºF to support battery charging in austere environments. Extends battery performance and lifespan when operating below 0ºC/32ºF.

Long Term Cost-Effectiveness: 

Field serviceable and upgradable. Overall maintenance costs are lowered due to the use of high quality components and a subsystem design approach. Batteries have a 5000+ lifecycle over 10 years. Long-term costs are lowered and overall ROI can be realized sooner.

Multiple Voltage Options: 

AC output voltages of 108V, 110V & 120V and 220V, 230V & 240V at 2kW or 3kW continuous, 4kW or 6kW (2 second peak).

Safety: 

Features the safest lithium-ion iron phosphate (LiFePo4/LFP) battery chemistry, high-reliability electronics, thermal management, and NEMA-3 rated enclosures for personnel and device protection. Arc-fault circuit interrupter (AFCI) and heavy duty 20A hospital grade plug options are available for total protection.

Applications

Vulcan supports multiple power applications. Please visit our website www.soldonum.com or contact sales@soldonum.com for a power solution that fits your needs. Vulcan Microgrid© supports:


Time-of-Use/Arbitrage: Use battery energy during “peak” hours when electricity demand and the price is higher, and charge it during “off-peak” hours, under time-of-use (TOU) rate plans.

Backup: Protect critical loads with long-term backup power for hours or days of power coverage.

Generator Firming and Peak Shaving: Use generators as a grid or DER input with renewables and battery energy to extend generator fuel reserves and reduce power demand.

Islanded Microgrid: Use solar+generators and other DER to form a perpetual microgrid.


Architecture


Size, Weight and Power - Efficiency and Value


Vulcan’s modular design allows for building out systems with a small footprint to deliver the power you need from DC and AC distributed energy resources (DER). The all-in-one design ensures ease of installation and use without a custom design/build installation.

Key Features:


  • Size: Vulcan’s modular Inverter-Charger and Smart Store expansion batteries are each 20"H x 23"D x 10"W and can be placed flat or stacked to meet floor or rack space requirements.
  • Weight: Vulcan modules weigh an average of 65 lbs making for a 5kWh turnkey system capacity of 3.3Ah/lb vs 0.9Ah/lb for comparable lead-acid battery based system. More power, less weight.
  • Power: Vulcan uses safe and high energy density, Grade A Lithium Iron Phosphate (LiFePO4/LFP) battery cells for energy production that surpass 5000 charge/discharge cycles over a 10 year period for a higher return on investment (ROI).
  • Everything in one box: All in one means less cabling, consistent design and lower installation costs.

Grid Backup or Islanded Microgrid Operation


Energy preference (Grid) or (Battery/DER). Choose the mode of operation best suited for your needs. Set the energy preference mode selector to Grid to use the system as a traditional backup. If grid zero connectivity is your preference to run loads from the battery and other connected DER for cost savings or peak shaving, set the selector to Batt/DER and the Vulcan Microgrid©will power your loads from the DER sources and battery, only switching to grid backup if the battery state of charge drops below 20%. This reduces carbon emissions and energy savings.


Key Features:


  • Dual AC Inputs: Separate Grid and DER inputs allow for flexibility to support peak smoothing, energy buffering and backup. Grid is switched between the inverter and AC/DC converter with an automatic transfer switch. The DER input is switched while in Battery/DER mode.
  • Simultaneous AC and DC Charging: Charge from DER and grid sources at the same time to maintain power sharing across all sources.
  • Grid as Backup: Support Grid-as-a-Backup operation by switching to grid only when the battery is 20% or lower. The grid input is disconnected when the battery charging state reaches approximately 90% state of charge (SoC). This supports cost savings and electricity resilience by allowing for off-grid operation using multiple energy sources.


Battery Discharge Graph


The discharge graph shows representative load runtimes of sample Vulcan battery configurations 1.4kWh, 5kWh and 8.6kWh. This illustrates the estimated number of runtime hours that can be achieved when battery capacity is increased. Additional runtime hours can be obtained by adding more battery capacity, solar, generator or other DER to offset the balance of the energy needed.



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