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Planning Tool

Solar Planner

Estimate the solar generation and battery storage your project might need before you choose equipment or finalize a system design.

Build your solar planning estimate

Use simple early-stage assumptions. These results are planning estimates, not an engineering recommendation.

Daily electricity use

Choose a starting point or enter your own estimate in kWh per day.

Use a location-specific planning estimate when available. This is not a universal U.S. default.How many days of your estimated electricity use should the battery cover?Planning assumption for the portion of nominal battery capacity intended for use.

How the estimate works

The planner estimates solar array size from daily energy use, peak sun hours, and an 86% system-efficiency assumption. Battery storage is based on your selected days of autonomy and usable battery capacity.

86%Solar system efficiency
1–3 daysBattery autonomy
80%Default usable battery capacity
Important: This planner is an early-stage estimate, not a solar-system design, engineering recommendation, or equipment quote. Use site-specific solar-resource data where available and verify final sizing with qualified professionals. The model does not account for detailed hourly or seasonal load profiles, shading analysis, panel orientation, inverter sizing, generator integration, battery chemistry, electrical-code requirements, or specific equipment.

Where do peak sun hours come from?

Peak sun hours are a simplified planning input representing equivalent full-sun hours available to a solar array. For a serious project, use location-specific solar-resource information rather than assuming one national value.

Based on this estimate

Solar products to research

These are planning candidates sized against the estimated solar array. They are not definitive equipment recommendations or a substitute for system design.

Rigid rooftop or ground-mount panel

Renogy 400W N-Type Bifacial Solar Panel

A 400W N-Type bifacial panel for fixed solar arrays where standard rigid modules fit the installation.

Rated power
400W
Cell type
N-Type
Panel type
Bifacial
Protection
IP68

Best for: Space-conscious fixed arrays where a 400W-class rigid panel is a practical planning candidate.

View manufacturer specifications

6 panels≈ 2.4 kW arrayCloser array fit

Portable or flexible solar setup

EcoFlow 400W Portable Solar Panel

A folding 400W portable panel designed for applications where portability and adjustable placement matter.

Rated power
400W
Conversion
Up to 23%
Protection
IP68
Design
One-piece folding panel

Best for: Portable power systems and flexible installations where a folding panel is more useful than a fixed module.

View manufacturer specifications

6 panels≈ 2.4 kW arrayCloser array fit

Rigid rooftop or ground-mount panel

Indepwr 440W Bifacial Solar Panel

A 440W N-Type bifacial module sold by Signature Solar for fixed residential and light-commercial arrays.

Rated power
440W
Cell type
N-Type monocrystalline
Panel type
Bifacial
Efficiency
22.50%

Best for: Fixed arrays where a 440W-class module and the installation space can accommodate the panel size.

View manufacturer specifications

6 panels≈ 2.6 kW arrayCloser array fit

Compatibility reminder: Panel count alone does not establish compatibility. Verify module voltage and current, series/parallel configuration, inverter or charge-controller input limits, mounting requirements, wiring, shading, roof or ground-mount space, local electrical requirements, and current manufacturer documentation before choosing equipment.
Keep researching

Use this estimate as a starting point, then review the related planning guidance before making project decisions.