Solar Proposal Risk Checker

How Solar Proposal Risk Checker works

Press Load model once: your browser downloads Gemma 4 E2B instruction-tuned (web build) (2.0 GB) from this site and keeps it in its cache. Then add your text and press Check locally. The model runs on this device using your graphics card, so nothing you enter is sent to a server. Until the model is loaded, or if your device cannot run it, the tool falls back to a simple keyword check and labels the result as the fallback.

Gemma 4 E2B instruction-tuned (web build) is a small open language model from Google. The tool sends it the instruction below plus your text, asks for a JSON answer with fixed fields, and shows each field as a card. It runs at temperature 0, so the same input gives the same answer on the same device, though different graphics cards can word it slightly differently.

Inputs longer than 6,000 characters are cut to that length before they reach the model, and the result says so. The model only sees what you paste: it does not look anything up.

The instruction the model gets

You review the key terms of a residential solar proposal, loan or lease. Copy system size, price, production estimate, escalator, warranty and financing terms exactly as written. Do not add, subtract, multiply, average or convert any numbers; copy every figure exactly as written. Flag terms a homeowner should question, such as price escalators, short labor warranties, excluded roof work, production guarantees, transfer on sale, or dealer fees. Do not give financial or legal advice and do not say whether the deal is good.

What it returns

• Key terms: Each term as 'item: value', copied exactly.
• Terms to question: Clauses or gaps that carry risk, each with a short reason.
• Not stated: Important terms the proposal leaves out, such as panel or inverter warranty, monitoring, or who handles permits.
• Questions for the installer: Specific questions to ask before signing.

Worked example

The model's output for the built-in sample, recorded on a desktop browser. Your run may word things slightly differently.

Solar proposal: 9.6 kW system, $31,800 cash price, production estimate 14,200 kWh/year, escalator 2.9%, roof replacement not included, warranty 10 years labor.

Key terms

system size: 9.6 kW price: $31,800 cash price production estimate: 14,200 kWh/year escalator: 2.9% warranty: 10 years labor

Terms to question

roof replacement not included: Excludes potential necessary roof work. production estimate: Not a guarantee: Production estimates are not guaranteed.

Not stated

Panel warranty Inverter warranty Monitoring details Permitting responsibility

Questions for the installer

What is the exact scope of work for roof replacement? What is the warranty coverage for the panels and inverter? What is the process for monitoring system performance? Who is responsible for obtaining necessary permits?

The model

The files are served from this site, versioned so a cached copy is never stale. Nothing is fetched from a third party while you use the tool.

Limitations

• Small language models make mistakes: they can miss an item, merge two, or state something more confidently than the text supports. Check the result against your input before you rely on it.
• It needs WebGPU and about 8 GB of memory, so it is offered on desktops and laptops, not on phones and tablets. Devices that cannot run it get the keyword fallback, clearly labelled.
• Results describe the input you gave, not the real-world situation behind it. Review them yourself before acting.

Good uses

• Triage energy and utilities notes before deeper review
• Prepare consistent labels for repeat workflows
• Reduce manual sorting on small batches
• Keep sensitive drafts in the browser preview