Fronius

Fronius

Use this skill for operator-approved Fronius photovoltaic monitoring: local inverter reads through Fronius Solar API V1 and cloud reads through Solar.web Query API. This v1 skill covers read-only monitoring for inverters, meters, storage, OhmPilot, and Solar.web account data.

Core Contract

• Run supported operations through skills/fronius/fronius.cjs; the helper is the source of truth for Fronius URLs, Solar.web headers, endpoint bounds, and response-shape metadata.
• For the common "what is my solar doing now?" local LAN query, use the helper local-summary command. It performs the bounded local Solar API reads and returns normalized live production, consumption, grid, battery, meter, and storage fields.
• For live API calls, run the helper to build the request, then pass the emitted httpRequest object unchanged to the built-in http_request tool.
• Use local-health through the helper and http_request for local reachability checks.
• The helper emits only allowlisted endpoint shapes. It rejects arbitrary path passthrough and command-line secret values.
• Treat the inverter LAN base URL as plain local configuration. Use --local-host http://<fronius-ip> when the operator provides it, or use the configured FRONIUS_LOCAL_HOST environment value.
• Solar.web Query API authentication uses AccessKeyId and AccessKeyValue HTTP headers per Fronius' interface documentation. The helper emits those as secretHeaders so the gateway injects them server-side.
• Treat the first 401 or 403 live response as final for that attempt. For 429, report the rate-limit condition and any retry-after guidance.
• Treat local host reachability, gateway host policy, and macOS Local Network permission as separate failure modes.

Setup

Local inverter path:

hybridclaw env set FRONIUS_LOCAL_HOST "http://<fronius-ip>"

The inverter LAN URL is configuration, not credential material. It can also be passed per request with --local-host http://<fronius-ip> or exported as FRONIUS_LOCAL_HOST.

Solar.web cloud path setup order:

1. Browser admin: open the active HybridClaw admin URL ending in /admin/secrets and set FRONIUS_SOLARWEB_ACCESS_KEY_ID and FRONIUS_SOLARWEB_ACCESS_KEY_VALUE.
2. Browser /chat or TUI fallback: /secret set FRONIUS_SOLARWEB_ACCESS_KEY_ID "<access-key-id>" and /secret set FRONIUS_SOLARWEB_ACCESS_KEY_VALUE "<access-key-value>".
3. Local console fallback:

hybridclaw secret set FRONIUS_SOLARWEB_ACCESS_KEY_ID "<access-key-id>"
hybridclaw secret set FRONIUS_SOLARWEB_ACCESS_KEY_VALUE "<access-key-value>"

Solar.web Query API access is requested from Solar.web. Create and store the AccessKeyId and AccessKeyValue in HybridClaw secrets as soon as Solar.web shows them. Solar.web Premium or a paid Query API package may be required for some system, historical, and aggregate endpoints.

The cloud helper emits:

{
  "secretHeaders": [
    { "name": "AccessKeyId", "secretName": "FRONIUS_SOLARWEB_ACCESS_KEY_ID", "prefix": "none" },
    { "name": "AccessKeyValue", "secretName": "FRONIUS_SOLARWEB_ACCESS_KEY_VALUE", "prefix": "none" }
  ]
}

The gateway injects the real access-key values server-side. Model-visible helper output, prose, logs, and tests should contain only SecretRef names.

Command Contract

Show helper usage:

node skills/fronius/fronius.cjs --help

Local reads:

node skills/fronius/fronius.cjs --format json --local-host http://<fronius-ip> local-summary
node skills/fronius/fronius.cjs --format json http-request local-api-version
node skills/fronius/fronius.cjs --format json http-request local-health
node skills/fronius/fronius.cjs --format json http-request local-power-flow
node skills/fronius/fronius.cjs --format json http-request local-inverter-realtime --scope System
node skills/fronius/fronius.cjs --format json http-request local-meter-realtime --scope System
node skills/fronius/fronius.cjs --format json http-request local-storage-realtime --scope System
node skills/fronius/fronius.cjs --format json http-request local-ohmpilot-realtime --scope System
node skills/fronius/fronius.cjs --format json http-request local-archive \
  --start 2026-05-26 \
  --end 2026-05-27 \
  --channel EnergyReal_WAC_Sum_Produced
node skills/fronius/fronius.cjs --format json http-request local-logger-info
node skills/fronius/fronius.cjs --format json http-request local-active-device-info --device-class Inverter

Cloud reads:

node skills/fronius/fronius.cjs --format json http-request cloud-pvsystems
node skills/fronius/fronius.cjs --format json http-request cloud-auth-check
node skills/fronius/fronius.cjs --format json http-request cloud-pvsystem --pv-system <id>
node skills/fronius/fronius.cjs --format json http-request cloud-flowdata --pv-system <id>
node skills/fronius/fronius.cjs --format json http-request cloud-aggrdata \
  --pv-system <id> \
  --period day \
  --from 2026-05-26
node skills/fronius/fronius.cjs --format json http-request cloud-histdata \
  --pv-system <id> \
  --from 2026-05-20 \
  --to 2026-05-27 \
  --channel EnergyReal_WAC_Sum_Produced
node skills/fronius/fronius.cjs --format json http-request cloud-messages --pv-system <id> --since 2026-05-20
node skills/fronius/fronius.cjs --format json http-request cloud-devices-list --pv-system <id>
node skills/fronius/fronius.cjs --format json http-request cloud-errors --pv-system <id> --since 2026-05-20

Run one gateway-proxied smoke request:

node skills/fronius/fronius.cjs --live --format json http-request cloud-flowdata --pv-system <id>

Health Checks

• local-health verifies local-host reachability by reading the local API version endpoint.
• cloud-auth-check verifies Solar.web key validity by reading the bounded PV systems list endpoint. A 401 or 403 from Solar.web means the upstream API rejected the injected key pair or the key lacks access. Gateway errors that name FRONIUS_SOLARWEB_ACCESS_KEY_ID or FRONIUS_SOLARWEB_ACCESS_KEY_VALUE indicate missing, unavailable, or blocked SecretRefs. A 429 means the account hit Solar.web rate limits.

Error Interpretation

• For local DNS, connection refused, timeout, no route to host, or gateway network-policy denial, report the exact gateway/local failure and ask for the actual inverter host when no operator-supplied host is available.
• For helper errors naming FRONIUS_LOCAL_HOST, ask the operator for the inverter LAN base URL or a configured environment value.
• For gateway errors naming FRONIUS_SOLARWEB_ACCESS_KEY_ID or FRONIUS_SOLARWEB_ACCESS_KEY_VALUE, ask the operator to set or unblock that specific secret.
• For Solar.web 401 or 403, report that the configured Solar.web key pair was rejected or lacks access.
• When both local and cloud paths fail, give a concise status for each path and one next action for each.

Result Handling

• Use local-summary for local live status answers. Report from its normalized metrics, meter, and storage objects.
• Use local-power-flow or cloud-flowdata to summarize live production, consumption, grid exchange, battery power, and self-consumption ratio.
• For local live production, prefer local-power-flow; read current PV production from Body.Data.Site.P_PV in watts, current load from Body.Data.Site.P_Load, grid exchange from Body.Data.Site.P_Grid, and battery power from Body.Data.Site.P_Akku when present.
• Use local-meter-realtime --scope System for Smart Meter details; read current meter power from Body.Data.<meterId>.PowerReal_P_Sum.
• Use local-storage-realtime --scope System for battery details; read state of charge from Body.Data.<storageId>.Controller.StateOfCharge_Relative and prefer local-power-flow P_Akku for live battery power.
• For inverter-only live output, use local-inverter-realtime --scope System; read current AC inverter power from Body.Data.PAC.Values in watts and sum the device values when a plant total is needed. For a single device, use local-inverter-realtime --scope Device --device-id <id> --data-collection CommonInverterData and read Body.Data.PAC.Value in watts.
• Use local-inverter-info for inverter identity, status, serial/unique ID, and connected or rated PV capacity. Interpret PVPower from GetInverterInfo.cgi as connected/rated PV capacity in watts.
• Use local-archive, cloud-aggrdata, or cloud-histdata for R5 energy rollups. Helper output includes a responseShape describing stable rollup fields such as produced energy, consumed energy, period, and channel values.
• Use cloud-messages and cloud-errors for R29 incident-card summaries: inverter offline, battery fault, export curtailment, meter failure, or repeated communication errors.
• State whether each answer came from the local inverter or Solar.web cloud. When the operator explicitly asks for local LAN data, keep the answer scoped to the local path unless the operator asks for cloud fallback.

Policy Notes

Local inverter access requires gateway host policy for the selected LAN host and Fronius /solar_api/ paths. Cloud access requires policy for api.solarweb.com. Keep mutating endpoints out of scope for v1 even if an API reference mentions installer-only or configuration surfaces.

References: Fronius Solar API V1, Solar.web Query API, and Solar.web Query API overview.