Response time
Instant
20 seconds or more for full building load
Load pickup
Full
Critical only
Runtime
100 hours / year for the diesel generator (per US EPA)
100 hours/year (per US EPA)
Controls variable current, voltage + frequency from grid
Yes
No
Requires utility interconnection agreement
No
Yes
Battery lifespan (most common chemistry)
Lithium iron phosphate - rated for 6,000 cycles
Lead acid - rated for 1,500 cycles
Power efficiency
99% at full load
40% at 80% total load capacity6
Carbon footprint
Reduced by 90% compared to diesel generators
Increased regulatory controls
Space requirements
Significantly less than diesel generators
Could be up to 50% of building space and 20-40% of land
Designed to integrate with renewable sources
Yes
No
Continuously monitored by software
Yes
No
Enables participation in utility incentives
Yes
No
Tax credits available
Yes - up to 50% via the Federal Tax Incentives Bill
No