diff --git a/docs/changelog.d/docs-power-infrastructure.doc.md b/docs/changelog.d/docs-power-infrastructure.doc.md
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+Add power infrastructure reference card documenting the battery-backed UPS chain (Anker SOLIX F2000 → CyberPower UPS → homelab).
diff --git a/docs/reference/infrastructure/indri.md b/docs/reference/infrastructure/indri.md
index 7f0b91d..672cdc4 100644
--- a/docs/reference/infrastructure/indri.md
+++ b/docs/reference/infrastructure/indri.md
@@ -18,7 +18,7 @@ Primary BlumeOps server. Mac Mini M1 (2020).
 | **macOS** | 15.7.3 (Sequoia) |
 | **Tailscale hostname** | `indri.tail8d86e.ts.net` |
 | **Tailscale Tag** | `tag:homelab` |
-| **UPS** | Anker SOLIX F2000 GaNPrime |
+| **Power** | [[power|Battery-backed UPS]] |
 
 ## Services Hosted
 
diff --git a/docs/reference/infrastructure/power.md b/docs/reference/infrastructure/power.md
new file mode 100644
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+++ b/docs/reference/infrastructure/power.md
@@ -0,0 +1,35 @@
+---
+title: Power
+tags:
+  - infrastructure
+---
+
+# Power Infrastructure
+
+The homelab runs on battery-backed power to survive grid outages.
+
+## Power Chain
+
+```
+AC Grid (120V) → Anker SOLIX F2000 → CyberPower CP1000PFCLCD → Homelab
+```
+
+| Stage | Device | Notes |
+|-------|--------|-------|
+| **Grid** | 120V AC mains | Charges the battery station |
+| **Battery** | Anker SOLIX F2000 GaNPrime | 2048Wh portable power station |
+| **UPS** | CyberPower CP1000PFCLCD | 1000VA / 600W, pure sine wave output |
+
+## Devices on UPS
+
+| Device | Role |
+|--------|------|
+| [[indri]] | Primary server |
+| [[sifaka]] | NAS |
+| UniFi Express 7 | WiFi router |
+| Starlink | Satellite internet uplink |
+
+## Related
+
+- [[hosts]] - Device inventory
+- [[restart-indri]] - Shutdown and startup procedure
diff --git a/docs/reference/reference.md b/docs/reference/reference.md
index 1041fb6..f0794d5 100644
--- a/docs/reference/reference.md
+++ b/docs/reference/reference.md
@@ -47,6 +47,8 @@ Host inventory and network configuration.
 - [[tailscale]] - ACLs, groups, tags
 - [[gandi]] - DNS hosting for `eblu.me`
 - [[routing|Routing]] - DNS domains, port mappings
+- [[power]] - Battery-backed power chain
+
 ## Kubernetes
 
 Cluster configuration and application registry.