0.625 sun-days is the example result. Read it using the units and relationship stated below.
Power Station Solar Recharge uses battery to recharge (wh), solar input (w), peak sun hours.
Distinguishing electrical arithmetic from equipment selection
For power station solar recharge, the relationship is Result = (([Battery to recharge (Wh)]) ÷ ([Solar input (W)] × [Peak sun hours] × ([Charging efficiency (%)] ÷ 100))). The amount depends on the supplied battery to recharge (wh), solar input (w), rather than a live market price or a value imported from another record. 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.
What the model includes
Result = (([Battery to recharge (Wh)]) ÷ ([Solar input (W)] × [Peak sun hours] × ([Charging efficiency (%)] ÷ 100))) Read unit labels before comparing results. Motor estimates depend on phase, efficiency and power factor; energy budgets depend on duration and duty cycle. Nameplate values and measured consumption may differ under real loads. Treat the output as the stated estimate. It does not select a code-compliant conductor, protective device or complete installation. Equipment specifications and applicable requirements remain part of the design decision.
Example with the supplied inputs
Battery to recharge (Wh): 1000; Solar input (W): 400; Peak sun hours: 5; Charging efficiency (%): 80. Result: 0.625 sun-days. The values are illustrative.
Compare one changed input
Battery to recharge (Wh) changes from 1000 to 1100. The result becomes 0.6875 sun-days. All other inputs remain fixed.
Calculation rule
Result = (([Battery to recharge (Wh)]) ÷ ([Solar input (W)] × [Peak sun hours] × ([Charging efficiency (%)] ÷ 100)))
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Battery to recharge (Wh) | 1000 | Measure battery to recharge (wh) in the displayed unit. Convert the source measurement before entry if it uses another system; a changed label does not perform a unit conversion. |
| Solar input (W) | 400 | Use the source quantity represented by solar input (w). Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Peak sun hours | 5 | Use the duration unit stated in peak sun hours. A time period is not interchangeable with a currency amount or a count of events. |
| Charging efficiency (%) | 80 | Enter charging efficiency (%) 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. |
Output: 0.625 sun-days is the example result. Read it using the units and relationship stated below. Unit: sun-days.
How to use the page
Collect the inputs
Gather Battery to recharge (Wh), Solar input (W), Peak sun hours. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Battery to recharge (Wh) on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 0.625 sun-days.
Change Battery to recharge (Wh) from 1000 to 1100 while keeping every other value fixed. The result becomes 0.6875 sun-days. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
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