Start with appliances, usage hours, duty cycles, and surge assumptions.
Solar & backup power planning
Size better backup systems before the first quote.
GridGap helps homeowners, installers, and small businesses estimate loads, batteries, inverter sizing, solar requirements, warnings, assumptions, and report-ready results.
Battery estimate
10.2 kWh
Solar array
4.8 kW
Model battery-only backup or solar + battery hybrid systems.
Expose assumption gaps before users rely on a result.
Use Pro+ for cleaner PDF output and branded report presentation.
Why GridGap exists
Backup power planning is full of hidden assumptions.
Battery capacity, inverter size, solar production, runtime, cloud conditions, depth of discharge, charger efficiency, and surge loads all affect the final estimate.
GridGap turns those moving parts into a structured planning workflow so users can compare options clearly before involving a qualified professional.
Common issue
Underestimated surge loads
GridGap response
Warnings, assumptions, and result context
Outcome
Cleaner early-stage conversations
Day and night usage
Model when each load actually runs.
Separate night/no-sun loads from daytime solar-time loads, then size the system around how energy is really used.
- Night and day load groups
- Appliance-level usage hours
- Scenario inclusion controls
- Saved changes and repeatable workflows
Features
Everything needed for a better preliminary system estimate.
GridGap does not try to replace final engineering. It helps users reach a better starting point.
Battery and inverter sizing
Estimate battery capacity, inverter size, charger requirements, and backup runtime.
Solar hybrid estimates
Estimate solar array size, panel count, controller guidance, and recharge assumptions.
Scenario comparisons
Compare battery-only and solar-hybrid scenarios across saved project versions.
Warnings and assumptions
Review assumptions, default values, and warnings that affect each result.
Installation guidance
Generate preliminary planning guidance without presenting it as certified design.
Equipment check
Compare selected equipment against calculated requirements before moving forward.
App workflow
From appliance list to result review, the workflow stays structured.
How it works
A simple flow for complex energy decisions.
GridGap guides users through the key inputs, performs the calculation in the backend, stores results by version, and presents outputs with warnings and assumptions.
Add your loads
Choose appliances, quantities, wattage, runtime, and usage patterns.
Pick a scenario
Model battery-only backup or solar + battery hybrid systems.
Review results
See battery, inverter, charging, solar, warnings, and assumptions.
Save or export
Compare versions and export professional reports on Pro+.
Professional output
Turn saved results into cleaner report-ready summaries.
Pro+ adds PDF export and branded output for installers and businesses that need a more polished way to share preliminary results.
Pricing
Start simple. Upgrade when you need deeper control or reports.
Free
$0
For trying GridGap and running basic estimates.
- Free account
- Simple mode
- One project
- Basic results
- No PDF export
Popular
Pro
$20/month
For installers and serious users who need deeper control.
- Simple and technical mode
- Unlimited projects
- Version history
- Full calculation views
- Equipment check
Pro+
$50/month
For professionals who need client-ready outputs.
- Everything in Pro
- PDF export
- Branded reports
- Professional formatting
- Priority support
Subscriptions are managed through the GridGap web account. Future mobile apps are planned as free companion apps.
Plan comparison
Pick the level that fits how seriously you use the calculator.
| Feature | Free | Pro | Pro+ |
|---|---|---|---|
| Simple mode | Yes | Yes | Yes |
| Technical mode | No | Yes | Yes |
| Saved projects | 1 | Unlimited | Unlimited |
| Version history | Only current version | Yes | Yes |
| Battery and inverter sizing | Basic | Full | Full |
| Solar hybrid sizing | Basic | Full | Full |
| Assumptions and warnings | Basic | Full | Full |
| Equipment check | No | Yes | Yes |
| PDF export | No | No | Yes |
| Branded PDF reports | No | No | Yes |
| Support level | Basic | Standard | Priority |
FAQ
Questions before you start.
Short answers for users who want to understand the product boundaries and plan differences.
No. GridGap provides preliminary sizing estimates only. Final design and installation decisions must be checked by qualified professionals.
Homeowners, solar installers, small businesses, and anyone planning backup power or solar-assisted backup systems.
Yes. GridGap is designed to help estimate backup requirements for outages, load shedding, and solar-assisted backup scenarios.
Free is for basic estimates, Pro adds technical tools and version history, and Pro+ adds PDF export and branded reports.
No. It helps with early planning and feasibility. Final equipment selection and installation must be professionally validated.
Mobile companion apps are planned so users can access their GridGap account and projects on Android and iOS.
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