Mini Tools Collection
Useful one-page tools for real work
ToolPatch is a growing collection of focused utilities. Each page handles one task with clear inputs, fast results, and practical outputs.
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Solar & Power
Featured
Battery Bank Capacity Calculator
Calculate required usable and total battery capacity.
Calculate battery bank size in kWh and Ah based on autonomy days, voltage, and depth of discharge.
Solar & Power
Featured
Charge Controller Sizing Calculator
Size MPPT or PWM charge controllers for safe operation.
Calculate required controller current (Amps) based on PV power and battery voltage with safety margins.
Solar & Power
Featured
Inverter Sizing Calculator
Determine recommended inverter continuous and surge ratings.
Size your inverter based on simultaneous continuous loads and peak motor starting surges.
Solar & Power
Featured
PV Stringing Helper
Analyze series and parallel solar panel configurations.
Optimize panel stringing based on Voc, Vmp, temperature coefficients, and MPPT voltage limits.
Solar & Power
Featured
Solar Array Size Calculator
Calculate required PV array size and panel count.
Determine the required DC solar capacity based on daily energy usage, peak sun hours, and system efficiency.
Solar & Power
Featured
Solar Charge Time Estimator
Estimate hours to reach target battery state of charge.
Predict the time required to recharge batteries based on present SOC, target SOC, and available charge power.