Solar Load Audit
Use critical load 1 (w), critical load 2 (w), backup hours, reserve (%) to prepare the solar load audit record. The worksheet applies the displayed arithmetic to your supplied values; it does not retrieve account data.
Use critical load 1 (w), critical load 2 (w), backup hours, reserve (%) to prepare the solar load audit record. The worksheet applies the displayed arithmetic to your supplied values; it does not retrieve account data.
Distinguishing electrical arithmetic from equipment selection
This worksheet calculates the displayed relationship from the supplied quantities. Its label and period conventions determine how the amount should be interpreted. Power, energy, voltage and current describe different quantities. Watts represent a rate; watt-hours represent energy over time. Battery and inverter losses can reduce usable runtime even when the rated capacity is unchanged.
Scope of this operation
The figure includes only the listed inputs. It does not add unlisted tax, overhead, provider charges or conversion losses. Negative results can represent a shortfall or the signed difference between options. The example output for solar load audit is shown below so the supplied source can be checked against the actual format. It is not evidence that the operation has run against your own file or account.
How it works
Load-side energy allowance (Wh), before conversion losses = ([Critical load 1 (W)] + [Critical load 2 (W)]) × [Backup hours] × (1 + [Reserve (%)] ÷ 100)
Inputs
| Field | Example | Definition |
|---|---|---|
| Critical load 1 (W) | 200 | Use the source quantity represented by critical load 1 (w). Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Critical load 2 (W) | 150 | Use the source quantity represented by critical load 2 (w). Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Backup hours | 6 | Use the duration unit stated in backup hours. A time period is not interchangeable with a currency amount or a count of events. |
| Reserve (%) | 15 | Enter reserve (%) on the percentage scale used in the formula (20 means 20%, not 0.20). Keep its base and reporting period consistent with the other inputs. |
Step-by-step guide
Prepare the source
Supply Critical load 1 (W), Critical load 2 (W), Backup hours. Keep the original material so the output can be compared with it.
Build output
Check Critical load 1 (W), Critical load 2 (W), then select Build output.
Use the result
Compare the solar load audit result with the unchanged source before copying or downloading it.
When to use it
Load-side energy allowance (Wh), before conversion losses = ([Critical load 1 (W)] + [Critical load 2 (W)]) × [Backup hours] × (1 + [Reserve (%)] ÷ 100) The figure includes only the listed inputs. It does not add unlisted tax, overhead, provider charges or conversion losses. Negative results can represent a shortfall or the signed difference between options.
Example and scope
Example inputs: Critical load 1 (W): 200; Critical load 2 (W): 150; Backup hours: 6; Reserve (%): 15.
The figure includes only the listed inputs. It does not add unlisted tax, overhead, provider charges or conversion losses. Negative results can represent a shortfall or the signed difference between options.
Worked output
Load-side energy allowance (Wh), before conversion losses: 2415 Assumptions: load1: 200 load2: 150 hours: 6 reserve: 15
Related tool family
This focused tool is associated with Budget Review Planner. Use it when you need to isolate a specific part of that wider workflow.
Several parent models may support the same step. Keep the business question visible and choose the version that best matches the process you actually need to manage.
Related parent models
Budget Review Planner
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026