diff --git a/bluewalker-vfi-icr/README.md b/bluewalker-vfi-icr/README.md
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+# NUT config: PowerWalker VFI ICR IoT
+
+Network UPS Tools setup for a PowerWalker VFI ICR IoT UPS.
+
+- **Master**: one host connected to the UPS via **USB** (`nutdrv_qx`), runs
+  `upsd` + `upsmon`, and serves status to the network on port `3493/tcp`.
+- **Clients**: any other Linux hosts run `upsmon` as network slaves and shut
+  down gracefully when the master signals a power failure (FSD).
+
+This avoids the undocumented Modbus TCP register map entirely. If you ever
+want a pure-network (no USB) setup, you would need the Modbus register map
+from PowerWalker support plus the `nutdrv_modbus` driver -- not used here.
+
+## Layout
+
+```
+master/etc/nut/   config for the USB-connected host
+client/etc/nut/   config for each network slave
+install-master.sh deploy + permissions on the master
+install-client.sh deploy on a client: sudo ./install-client.sh <MASTER_IP>
+```
+
+## Quick start
+
+### Master (USB host)
+
+```
+sudo ./install-master.sh
+# edit /etc/nut/upsd.users   -> set monmaster / monslave passwords
+# edit /etc/nut/upsmon.conf  -> set the same monmaster password
+sudo nutdrv_qx -a test -DD -x port=auto   # confirm the driver reads values
+sudo systemctl enable --now nut-server nut-monitor
+upsc ups@localhost
+```
+
+If the test shows no/garbled values, retry with:
+
+```
+sudo nutdrv_qx -a test -DD -x port=auto -x protocol=voltronic -x novendor
+```
+
+and uncomment the matching lines in `master/etc/nut/ups.conf`.
+
+### Each client
+
+```
+sudo ./install-client.sh <MASTER_IP>
+# edit /etc/nut/upsmon.conf -> set the monslave password
+sudo systemctl enable --now nut-monitor
+upsc ups@<MASTER_IP>
+```
+
+## Notes
+
+- Open `3493/tcp` on the master firewall for your client subnets.
+- `runtimecal` in `ups.conf`: these UPS models may not report runtime;
+  NUT then estimates it. Format: `sec_at_full,full_pct,sec_at_half,half_pct`.
+  Adjust to your battery / EBM configuration.
+- `upsd.users` holds plaintext credentials and is gitignored. Keep the real
+  file off the repo; distribute it out of band (or via your secrets tooling).
+- To also cut UPS output power after the master shuts down, look into
+  `upsdrvctl shutdown` / the `POWERDOWNFLAG` mechanism -- intentionally left
+  out here to keep the first deployment simple.
diff --git a/bluewalker-vfi-icr/install-client.sh b/bluewalker-vfi-icr/install-client.sh
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+++ b/bluewalker-vfi-icr/install-client.sh
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+#!/usr/bin/env bash
+# install-client.sh -- deploy NUT network-slave config
+# Usage: sudo ./install-client.sh <MASTER_IP>
+# ASCII only.
+
+set -euo pipefail
+
+SRC="$(cd "$(dirname "$0")" && pwd)/client/etc/nut"
+DST="/etc/nut"
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "ERROR: run as root (sudo)." >&2
+    exit 1
+fi
+
+MASTER_IP="${1:-}"
+if [ -z "$MASTER_IP" ]; then
+    echo "Usage: sudo $0 <MASTER_IP>" >&2
+    exit 1
+fi
+
+echo "== Installing NUT (if missing) =="
+if command -v apt-get >/dev/null 2>&1; then
+    apt-get update && apt-get install -y nut
+elif command -v dnf >/dev/null 2>&1; then
+    dnf install -y nut
+else
+    echo "WARN: unknown package manager, install 'nut' manually." >&2
+fi
+
+echo "== Copying client config to ${DST} =="
+install -d "$DST"
+cp -v "$SRC/nut.conf" "$DST/nut.conf"
+sed "s/MASTER_IP/${MASTER_IP}/" "$SRC/upsmon.conf" > "$DST/upsmon.conf"
+
+chown root:nut "$DST/upsmon.conf" 2>/dev/null || true
+chmod 640 "$DST/upsmon.conf"
+
+echo
+echo "NEXT STEPS (manual):"
+echo "  1. Edit ${DST}/upsmon.conf -- replace CHANGE_ME_SLAVE with the master's monslave password."
+echo "  2. Enable the monitor service:"
+echo "       systemctl enable --now nut-monitor"
+echo "  3. Verify connectivity to the master:"
+echo "       upsc ups@${MASTER_IP}"
diff --git a/bluewalker-vfi-icr/install-master.sh b/bluewalker-vfi-icr/install-master.sh
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+#!/usr/bin/env bash
+# install-master.sh -- deploy NUT master config for PowerWalker VFI ICR IoT
+# Run as root on the USB-connected host. ASCII only.
+
+set -euo pipefail
+
+SRC="$(cd "$(dirname "$0")" && pwd)/master/etc/nut"
+DST="/etc/nut"
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "ERROR: run as root (sudo)." >&2
+    exit 1
+fi
+
+echo "== Installing NUT (if missing) =="
+if command -v apt-get >/dev/null 2>&1; then
+    apt-get update && apt-get install -y nut
+elif command -v dnf >/dev/null 2>&1; then
+    dnf install -y nut
+else
+    echo "WARN: unknown package manager, install 'nut' manually." >&2
+fi
+
+echo "== Copying config files to ${DST} =="
+install -d "$DST"
+cp -v "$SRC/ups.conf"   "$DST/ups.conf"
+cp -v "$SRC/nut.conf"   "$DST/nut.conf"
+cp -v "$SRC/upsd.conf"  "$DST/upsd.conf"
+cp -v "$SRC/upsmon.conf" "$DST/upsmon.conf"
+
+if [ ! -f "$DST/upsd.users" ]; then
+    cp -v "$SRC/upsd.users.example" "$DST/upsd.users"
+    echo "NOTE: created upsd.users from example -- edit the passwords now."
+else
+    echo "NOTE: upsd.users already exists, left untouched."
+fi
+
+echo "== Setting ownership and permissions =="
+chown root:nut "$DST"/*.conf "$DST/upsd.users" 2>/dev/null || true
+chmod 640 "$DST/upsd.users" "$DST/upsmon.conf"
+
+echo
+echo "NEXT STEPS (manual):"
+echo "  1. Edit ${DST}/upsd.users and ${DST}/upsmon.conf -- replace CHANGE_ME_* passwords."
+echo "  2. Plug in the UPS via USB and test the driver:"
+echo "       nutdrv_qx -a test -DD -x port=auto"
+echo "     (add -x protocol=voltronic -x novendor if values are missing)"
+echo "  3. Enable services:"
+echo "       systemctl enable --now nut-server nut-monitor"
+echo "  4. Verify:"
+echo "       upsc ups@localhost"
+echo "  5. Open 3493/tcp in the firewall for your client subnets."
diff --git a/bluewalker-vfi-icr/nut-powerwalker-vfi-icr-iot.tar.gz b/bluewalker-vfi-icr/nut-powerwalker-vfi-icr-iot.tar.gz
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index 0000000..1ee879d
Binary files /dev/null and b/bluewalker-vfi-icr/nut-powerwalker-vfi-icr-iot.tar.gz differ
diff --git a/bluewalker-vfi-icr/ups.conf b/bluewalker-vfi-icr/ups.conf
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+++ b/bluewalker-vfi-icr/ups.conf
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+# /etc/nut/ups.conf  -- MASTER (USB-connected host)
+# PowerWalker VFI ICR IoT via nutdrv_qx over USB.
+#
+# Uncomment the protocol/novendor/runtimecal lines only if the bare
+# config does not return clean values. See README for the test command.
+
+[ups]
+    driver = nutdrv_qx
+    port = auto
+    desc = "PowerWalker VFI ICR IoT"
+    pollinterval = 5
+
+    # Fallbacks (enable if needed):
+    # protocol = voltronic
+    # novendor
+    # runtimecal = 600,100,1200,50