Keep the units attached to the number
Write down the power and energy figures exactly as they appear in the offer or drawing. A proposal described only as “five megawatts” leaves the amount of stored energy unanswered. Ask the team to supply the missing figure.
Power is normally expressed in kilowatts (kW) or megawatts (MW). Energy is normally expressed in kilowatt-hours (kWh) or megawatt-hours (MWh). One MW equals 1,000 kW; one MWh equals 1,000 kWh. The hour in the unit is part of its meaning.
EIA explains rated battery duration as energy capacity divided by power capacity. Use figures describing the same proposed system and rating basis. Ask the designer to distinguish the equipment rating from any limit on the connection.
If several battery areas or phases are shown, ask whether the headline numbers cover the whole development or only the first phase. Keep the dated layout with the figures so later changes are easy to identify.
Reference: EIA: power, energy capacity and battery duration
Check the duration in the proposal
Enter the stated power and energy capacity below. Choose the units shown in the document. The result illustrates the ratio of those two ratings; it does not model losses, operating limits, state of charge or changes over the project’s life.
The examples are arithmetic illustrations, not Sunland project specifications or limits for your property. The entries stay in this page and are not attached to the property inquiry.
Enter both positive ratings to check duration.
Duration = energy capacity (MWh) ÷ power (MW).
Ask which rating the team is using
Does the energy figure describe the equipment nameplate, usable energy or a promised delivery at the connection? Does the power figure describe the batteries, inverters or permitted export? Have the designer explain the basis of each figure before comparing proposals.
For example, if someone calls a proposal “four hours,” ask for the paired power and energy figures and the conditions behind that description. The calculator can check the simple ratio, but it cannot establish the actual operating performance.
If an offer mentions capacity in another context, ask what it means there. A project’s technical rating, a utility connection limit and a commercial payment measure may be different numbers. Request an explanation of the figure tied to each promise.
Want to ask about your land?
Send the location and what you know. You don’t need a project plan.
Tell us about your landCompare the size with the actual land drawing
Do not turn a megawatt figure into an acreage estimate. Request a map of the batteries, electrical equipment, entrances, cables, drainage, screening and temporary construction areas. Then compare that map with the land rights being requested.
If the energy rating increases while the power figure stays the same, ask whether the equipment count or layout changes. If the power rating increases, ask whether the electrical work or connection request changes. Have the team explain the actual design rather than assuming either change is minor.
Identify which area would be used permanently and which would be returned after construction. Ask whether additional phases are already included in the option or whether they would require another agreement.
Keep your retained uses on the map: a driveway, tenant parking, farming access or a future building area. A larger rating does not explain how those uses would be protected.
Check the number used for approvals and payments
Have the team identify the capacity measure used by the reviewing authority for the actual proposal. If a rule uses energy capacity, a power figure by itself does not answer that classification question. Ask for the current requirement and the project-specific explanation.
Read the payment terms separately. If rent is fixed, identify the land and rights it covers. If any payment changes with a project rating, ask which rating, document and measurement date determine it. An electricity-capacity figure should not leave your payment calculation ambiguous.
If the company can change the size later, ask whether that changes reserved land, construction access, rent or the option period. Identify the changes requiring your consent and how revised drawings become part of the agreement.
You can inquire without knowing these figures
Start with your name, email, phone and the property location. Acreage and a parcel number are optional. You do not need to calculate a project rating to ask about your land.
If you already have an offer, mention the figures it uses and what is unclear. Sunland can discuss the next questions. Sending the inquiry does not reserve your land, authorize entry or commit you to a lease or sale.
Questions landowners ask
Is 5 MW the same as 5 MWh?
No. MW describes power; MWh describes energy. Ask for both figures with their units.
How do I calculate battery duration?
Divide energy capacity in MWh by power in MW, using comparable ratings for the same system. 20 MWh divided by 5 MW is four hours.
Can the calculator tell me how many acres are needed?
No. The property layout, equipment and required rights need a separate review.
Does four hours mean the battery will always run for four hours?
No. This is a ratio of the supplied ratings. Actual operation depends on the equipment, available charge, operating conditions and limits.
Do these numbers establish a land payment?
No. Review the amount and conditions in the actual land agreement.
Sources & further reading
Sources checked 2026-10-06. Local rules and program details can change. Check the requirements for the actual project.