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Batteries follow solar. Same rule: VoltView reads the inverter or battery portal. We do not dispatch the battery in v1. A battery in VoltView is one storage system on one site, mapped to the same site and import MPAN as the solar it sits with (if any).

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When this ships

After the solar connect-and-map path is live on at least one OEM. Do not promise battery data on a site until that path exists.

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What you get

With solar and the import meter on the same site, VoltView can then show whether the battery charged from solar, from the grid, or covered a peak that would otherwise have been imported. “Covered a peak” means the battery discharged in the same settlement interval as the maximum demand — usually a half-hour. Those splits are derived. They need all three feeds (solar, battery, meter) on the same interval.

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Connect

Same preference order as solar:
  1. OEM API token.
  2. Read-only portal user.
  3. Installer share.
  4. File export (not a live feed).
Hybrid inverters often expose PV and battery on the same portal. In that case one connection can populate both a solar system and a battery on the site. Still store them as two assets so the meter mapping stays explicit.

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Map to the site

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Ownership

Same test as solar. If a funder owns the battery, their portal is the one that matters. Many UK C&I PPA roofs have no storage. Do not create a battery asset because the customer is “interested in batteries.”

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Supported after solar

No battery connector is in v1 until solar is shipping. The first targets are the portals we will already be in for PV: Residential products (for example Powerwall on a house) are not the C&I default. Add them only for a real site.

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What we do not do yet

  • Charge, discharge, or change a backup reserve.
  • Tariff-based optimisation on the battery.
  • Flexibility / VPP enrolment.
  • Sizing or payback as a live control loop. Modelling stays in the account conversation, not in the asset API.

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Checks after first pull

  1. Usable kWh matches the commissioning sheet.
  2. SOC stays in 0–100 and moves when charge/discharge power is non-zero.
  3. Interval energy is consistent with average power over the interval.
  4. If linked solar exists, battery charge in daylight is not treated as grid charge without looking at generation.