One plan. One price.
No tiers to decode. Start free, and when you want the whole thing — live sync, the daily plan, charging control and Watson's AI — it's less than a coffee a month. Cancel anytime.
Connect your Tesla + Powerwall and see what your solar did today.
- Tesla + Powerwall sync: auto AM, auto PM, + 1 midday manual pull
- Today's solar plan and hourly kW curve
- Tomorrow's headline + 7-day forecast strip
- Sunrise / sunset countdown
- 7-day history
- Weekly Watson-voiced household text (taste)
Everything WhatSun does, for every car, array and person in the house.
- Live power-flow view + continuous 2-minute Tesla/Powerwall sync
- Daily Watson briefing + copy-paste household text, all five voices
- EV charging planner, start/stop and charge limits from the car popup
- Never-charge-from-the-grid protection with overrides
- Solar Priority modes (Battery-first, Cars-first, Balanced, Storm-prep)
- Watson Orchestrator — auto-trim car charging to live solar
- AI bill analysis, next-bill prediction and the energy detective
- Multi-array, multi-EV and household members (up to 5)
- Unlimited history, panel health drift, weekly + monthly reports
Card required. No charge for 7 days. Cancel anytime in Billing before day 7.
Watson's Laboratory
A back room for the curious, where half-built automation gets tested in real homes before anyone else sees it. Chip in with a donation, or tell us about your setup and ask for an invite. Founding Members are in for life.
Watson's Laboratory access — for life.
Lifetime access to every WhatSun feature, including all future AI tools and Watson upgrades. Direct line to the developer, early-access feature flags, and a vote on the roadmap. Locked-in pricing — never a price increase.
- Everything in WhatSun, forever
- All future AI features included
- Tinker Bench: early-access toggles
- Lab Notebook: message the dev directly
- Vote on the public roadmap
- Founder #N badge & lifetime price-lock
First-year founding activation: $300 one-time + $199 membership billed today. Renews at $199/year, never increases. First 10 founding cards only. Each founder card is laser-cut and hand-numbered by Jason himself — not mass-manufactured. Card #1 is his.
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