# Monthly Solar Yield Planner

Supply your own monthly sun hours and day counts for a seasonal production worksheet.

[Open this tool](https://whatson.pk/monthly-calculator/)

Category: Solar & Battery

Solar production changes across months. A single annual average can hide a period with less energy available.

Enter monthly sun hours and actual day counts, then compare the seasonal worksheet. Replace all illustrative values before relying on the totals.

## Inputs and controls

* DC array capacity (kW). Allowed range: 0.001 to 1000000
* Overall AC yield factor (%). Allowed range: 0.01 to 100
* Period
* Days in period (days). Allowed range: 1 to 366
* Peak sun hours (hours/day). Allowed range: 0.01 to 24

## How to use

* Enter DC array capacity and overall AC yield factor.

* Add the entries in seasonal resource entries as separate rows. Include period, days in period and peak sun hours for each row.

* Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Month rows let you review seasonal assumptions individually instead of folding them into one unexplained annual yield.


## Before relying on the result

Starting sun hours are placeholders, not observed Pakistan weather. Enter 29 days for February in a leap year. Total covers only the entered rows.


## Tool limitations

Starting sun hours are placeholders, not observed Pakistan weather. Enter 29 days for February in a leap year. Total covers only the entered rows.

## Questions

### How should February be entered in a leap year?

Use 29 days. Check the selected year's calendar and enter the day count for every listed month.

### What should I check before using Monthly Solar Yield Planner?

Check DC array capacity, Overall AC yield factor, Period and Days in period. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T18:56:35+00:00

This profile describes the tool. It does not execute it or supply a professional certification.