Demand Charge Reduction Value
For a household with severe demand-charge exposure, a dedicated equipment investment, like a battery configured for peak shaving, can be worth pricing out on its own, separate from the low-cost scheduling changes covered elsewhere.
At your inputs, this specific peak-shaving investment has an NPV of $494 over 10 years, with a discounted payback of 9.3 years.
| Net cost after confirmed incentives | $8,000 |
|---|---|
| Annual savings | $1,100 |
| Net present value | $494 |
- This uses planning estimates you entered, not a contractor quote or guaranteed savings.
- A positive NPV does not guarantee the actual outcome; it reflects your entered assumptions discounted at your chosen rate.
What this also tells you: A positive NPV means the option is worth more than its cost even after discounting future savings back to today; a negative NPV means the upfront cost outweighs what the savings are worth today.
This is a planning estimate based on your entries. It does not size equipment, determine electrical or building-code compliance, verify incentive eligibility, or replace a contractor quote or professional energy audit.
Why this decision comes up
Some households face demand charges too large for simple scheduling changes to address, and a dedicated equipment investment deserves its own serious cost-benefit check.
How this is calculated
This discounts the annual demand-charge savings back to today's dollars over your ownership horizon, netted against the equipment cost, to produce an NPV.
A worked example
With the defaults ($8,000 equipment cost, $1,500/year unmanaged demand charges dropping to $400/year with peak shaving), the annual savings is $1,100 and the NPV comes out positive at $494 with a 9.3-year discounted payback, a real but more modest case than the low-cost scheduling approach, reflecting the larger upfront investment.
Common mistakes
A common mistake is jumping straight to expensive equipment before checking whether simple scheduling changes could capture most of the value at much lower cost.
Limitations
This does not size the specific equipment needed for your actual peak demand. A contractor needs to confirm that based on your real usage pattern.
Common questions
What equipment is typically used for serious demand-charge reduction?
A battery sized and configured specifically for peak shaving is the most common dedicated solution, discharging during your highest-demand moments to flatten your peak.
Is this the same as the battery demand-charge savings tool?
It uses the same underlying idea but this one is framed generally for any dedicated demand-charge equipment, while the battery-cluster tool is specifically scoped to a battery purchase.
When does this bigger investment make sense over simple scheduling?
When your demand charges are large enough that scheduling alone cannot flatten your peak sufficiently, typically for larger homes or households with concentrated high-power appliances.
Does solar help reduce demand charges too?
Solar can reduce demand charges somewhat by offsetting some usage, though it doesn't directly control timing the way a battery configured for peak shaving does. A battery is the more targeted tool for this specific problem.
How do I know my actual peak demand?
Check your utility bill for your billed peak kW figure, or ask your utility for your account's demand history if you want to see the pattern over several months.