Solargraf vs OpenSolar Free vs Paid CA Proposal Gen
The Problem: California's NEM 3.0 requires complex hourly modeling. Smaller installers and startups need a tool capable of handling the Avoided Cost Calculator (ACC) without paying the massive enterprise licensing fees demanded by premium software. The bottleneck is balancing software cost with necessary NEM 3.0 compliance.
While OpenSolar's free model is highly attractive, Solargraf (backed by Enphase) provides a slightly more robust, out-of-the-box native NEM 3.0 modeling engine for a reasonable, tiered price. If you are specifically selling in California, Solargraf's deep integration with Enphase hardware and CA rates provides a safer compliance path for the mid-market.
Critical Comparison Criteria
| Criteria | Solargraf | OpenSolar |
|---|---|---|
| Base Cost | Accessible Tiered Pricing | $0 / Forever Free ✦ |
| Hardware Integration | Native Enphase Synergy ✦ | Broad Hardware Support |
| NEM 3.0 Compliance | Robust Native Support ✦ | Supported via Updates |
| 3D Design Interface | Modern & Fast | Highly Customizable |
| Proposal Customization | Standard Templates | Deep Customization ✦ |
| Permit Pack Add-ons | Integrated Fulfillment ✦ | Partner Network |
Lumen's Take
OpenSolar is aggressively updating its battery dispatch logic, but Solargraf's acquisition by Enphase gave it a massive injection of capital to perfect its California storage modeling. If you are a zero-budget startup, OpenSolar works. But if you have even a modest software budget, Solargraf provides a more frictionless NEM 3.0 proposal workflow, especially if you install Enphase storage.
Deep Technical Audit
Looking for the raw side-by-side data? Access the full technical comparison matrix between Solargraf and OpenSolar.
Thinking of Pivoting to Solargraf?
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