diff --git a/cmd/ingestd/web.go b/cmd/ingestd/web.go
index e2154a4..b44d49a 100644
--- a/cmd/ingestd/web.go
+++ b/cmd/ingestd/web.go
@@ -28,6 +28,8 @@ type dashboardResponse struct {
 	Site         string                `json:"site"`
 	Model        string                `json:"model"`
 	OpenMeteoURL string                `json:"open_meteo_url,omitempty"`
+	RangeStart   time.Time             `json:"range_start"`
+	RangeEnd     time.Time             `json:"range_end"`
 	Observations []db.ObservationPoint `json:"observations"`
 	Forecast     db.ForecastSeries     `json:"forecast"`
 	Latest       *db.ObservationPoint  `json:"latest"`
@@ -90,6 +92,8 @@ func (s *webServer) handleDashboard(w http.ResponseWriter, r *http.Request) {
 	if rangeStr == "" {
 		rangeStr = "24h"
 	}
+	startStr := r.URL.Query().Get("start")
+	endStr := r.URL.Query().Get("end")
 	bucket := r.URL.Query().Get("bucket")
 	if bucket == "" {
 		bucket = "5m"
@@ -99,13 +103,37 @@ func (s *webServer) handleDashboard(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	rangeDur, err := time.ParseDuration(rangeStr)
-	if err != nil || rangeDur <= 0 {
-		http.Error(w, "invalid range", http.StatusBadRequest)
-		return
+	var (
+		start time.Time
+		end   time.Time
+		err   error
+	)
+	if startStr != "" || endStr != "" {
+		if startStr == "" || endStr == "" {
+			http.Error(w, "start and end required", http.StatusBadRequest)
+			return
+		}
+		start, err = parseTimeParam(startStr)
+		if err != nil {
+			http.Error(w, "invalid start", http.StatusBadRequest)
+			return
+		}
+		end, err = parseTimeParam(endStr)
+		if err != nil {
+			http.Error(w, "invalid end", http.StatusBadRequest)
+			return
+		}
+	} else {
+		rangeDur, err := time.ParseDuration(rangeStr)
+		if err != nil || rangeDur <= 0 {
+			http.Error(w, "invalid range", http.StatusBadRequest)
+			return
+		}
+		end = time.Now().UTC()
+		start = end.Add(-rangeDur)
 	}
 
-	observations, err := s.db.ObservationSeries(r.Context(), s.site.Name, bucket, int64(rangeDur.Seconds()))
+	observations, err := s.db.ObservationSeries(r.Context(), s.site.Name, bucket, start, end)
 	if err != nil {
 		http.Error(w, "failed to query observations", http.StatusInternalServerError)
 		log.Printf("web dashboard observations error: %v", err)
@@ -136,6 +164,8 @@ func (s *webServer) handleDashboard(w http.ResponseWriter, r *http.Request) {
 		Site:         s.site.Name,
 		Model:        s.model,
 		OpenMeteoURL: openMeteoURL,
+		RangeStart:   start,
+		RangeEnd:     end,
 		Observations: observations,
 		Forecast:     forecast,
 		Latest:       latest,
@@ -147,3 +177,13 @@ func (s *webServer) handleDashboard(w http.ResponseWriter, r *http.Request) {
 		log.Printf("web dashboard encode error: %v", err)
 	}
 }
+
+func parseTimeParam(v string) (time.Time, error) {
+	if t, err := time.Parse(time.RFC3339, v); err == nil {
+		return t, nil
+	}
+	if t, err := time.Parse("2006-01-02", v); err == nil {
+		return t, nil
+	}
+	return time.Time{}, errors.New("unsupported time format")
+}
diff --git a/cmd/ingestd/web/app.js b/cmd/ingestd/web/app.js
index d9a96db..8126602 100644
--- a/cmd/ingestd/web/app.js
+++ b/cmd/ingestd/web/app.js
@@ -1,6 +1,9 @@
 const state = {
   range: "24h",
   bucket: "5m",
+  tz: "local",
+  rangeStart: null,
+  rangeEnd: null,
   charts: {},
   timer: null,
 };
@@ -22,11 +25,25 @@ function formatNumber(value, digits) {
   return Number(value).toFixed(digits);
 }
 
-function formatTime(iso) {
-  if (!iso) return "--";
-  const dt = new Date(iso);
+function formatDateTime(value) {
+  if (!value) return "--";
+  const dt = value instanceof Date ? value : new Date(value);
   if (Number.isNaN(dt.getTime())) return "--";
-  return dt.toLocaleString();
+  const opts = { dateStyle: "medium", timeStyle: "short" };
+  if (state.tz === "utc") {
+    return new Intl.DateTimeFormat(undefined, { ...opts, timeZone: "UTC" }).format(dt);
+  }
+  return new Intl.DateTimeFormat(undefined, opts).format(dt);
+}
+
+function formatTick(value) {
+  const dt = new Date(value);
+  if (Number.isNaN(dt.getTime())) return "";
+  const opts = { month: "short", day: "numeric", hour: "2-digit", minute: "2-digit" };
+  if (state.tz === "utc") {
+    return new Intl.DateTimeFormat(undefined, { ...opts, timeZone: "UTC" }).format(dt);
+  }
+  return new Intl.DateTimeFormat(undefined, opts).format(dt);
 }
 
 function series(points, key) {
@@ -36,6 +53,84 @@ function series(points, key) {
   }));
 }
 
+function filterRange(points, start, end) {
+  if (!start || !end) return points;
+  const min = start.getTime();
+  const max = end.getTime();
+  return points.filter((p) => {
+    if (!p.ts) return false;
+    const t = new Date(p.ts).getTime();
+    return !Number.isNaN(t) && t >= min && t <= max;
+  });
+}
+
+function safeDate(value) {
+  if (!value) return null;
+  const dt = value instanceof Date ? value : new Date(value);
+  return Number.isNaN(dt.getTime()) ? null : dt;
+}
+
+function startOfDay(date, tz) {
+  if (tz === "utc") {
+    return new Date(Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate()));
+  }
+  return new Date(date.getFullYear(), date.getMonth(), date.getDate());
+}
+
+function startOfWeekSunday(date, tz) {
+  const day = tz === "utc" ? date.getUTCDay() : date.getDay();
+  const base = startOfDay(date, tz);
+  const diff = day;
+  return new Date(base.getTime() - diff * 24 * 60 * 60 * 1000);
+}
+
+function computeRange(range, tz) {
+  const now = new Date();
+  let start = null;
+  let end = null;
+  let axisStart = null;
+  let axisEnd = null;
+
+  switch (range) {
+    case "6h": {
+      end = now;
+      start = new Date(now.getTime() - 6 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
+    case "24h": {
+      start = startOfDay(now, tz);
+      end = new Date(start.getTime() + 24 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
+    case "72h": {
+      end = startOfDay(now, tz);
+      start = new Date(end.getTime() - 72 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
+    case "7d": {
+      start = startOfWeekSunday(now, tz);
+      end = new Date(start.getTime() + 7 * 24 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
+    default: {
+      end = now;
+      start = new Date(now.getTime() - 24 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+    }
+  }
+
+  return { start, end, axisStart, axisEnd };
+}
+
 function minMax(values) {
   let min = null;
   let max = null;
@@ -75,20 +170,35 @@ function upsertChart(id, config) {
   state.charts[id] = new Chart(ctx, config);
 }
 
-function baseOptions() {
+function baseOptions(range) {
   return {
     responsive: true,
     maintainAspectRatio: false,
     interaction: { mode: "index", intersect: false },
     plugins: {
       legend: { labels: { color: "#d6f0f0" } },
-      tooltip: { mode: "index", intersect: false },
+      tooltip: {
+        mode: "index",
+        intersect: false,
+        callbacks: {
+          title: (items) => {
+            if (!items.length) return "";
+            return formatDateTime(new Date(items[0].parsed.x));
+          },
+        },
+      },
     },
     scales: {
       x: {
         type: "time",
         time: { unit: "hour" },
-        ticks: { color: "#a4c4c4", maxTicksLimit: 6 },
+        ticks: {
+          color: "#a4c4c4",
+          maxTicksLimit: 6,
+          callback: (value) => formatTick(value),
+        },
+        min: range && range.axisStart ? range.axisStart : undefined,
+        max: range && range.axisEnd ? range.axisEnd : undefined,
         grid: { color: "rgba(123, 223, 242, 0.08)" },
       },
       y: {
@@ -106,10 +216,11 @@ function baseOptions() {
 
 function renderDashboard(data) {
   const latest = data.latest;
-  updateText("site-meta", `${data.site} | model ${data.model}`);
-  updateText("last-updated", `updated ${formatTime(data.generated_at)}`);
+  const tzLabel = state.tz === "utc" ? "UTC" : "Local";
+  updateText("site-meta", `${data.site} | model ${data.model} | ${tzLabel}`);
+  updateText("last-updated", `updated ${formatDateTime(data.generated_at)}`);
   const forecastMeta = data.forecast && data.forecast.points && data.forecast.points.length
-    ? `forecast retrieved ${formatTime(data.forecast.retrieved_at)}`
+    ? `forecast retrieved ${formatDateTime(data.forecast.retrieved_at)}`
     : "forecast not available";
   updateText("forecast-meta", forecastMeta);
 
@@ -121,6 +232,8 @@ function renderDashboard(data) {
     updateText("live-wdir", `${formatNumber(latest.wind_dir_deg, 0)}`);
     updateText("live-uvi", `${formatNumber(latest.uvi, 2)}`);
     updateText("live-lux", `${formatNumber(latest.light_lux, 0)}`);
+    updateText("live-battery", `${formatNumber(latest.battery_mv, 0)}`);
+    updateText("live-supercap", `${formatNumber(latest.supercap_v, 2)}`);
   } else {
     updateText("live-temp", "--");
     updateText("live-rh", "--");
@@ -129,6 +242,8 @@ function renderDashboard(data) {
     updateText("live-wdir", "--");
     updateText("live-uvi", "--");
     updateText("live-lux", "--");
+    updateText("live-battery", "--");
+    updateText("live-supercap", "--");
   }
 
   const forecastUrl = document.getElementById("forecast-url");
@@ -142,14 +257,21 @@ function renderDashboard(data) {
   }
 
   const obs = data.observations || [];
-  const forecast = (data.forecast && data.forecast.points) || [];
+  const forecastAll = (data.forecast && data.forecast.points) || [];
 
-  const obsTemps = obs.map((p) => p.temp_c);
-  const obsWinds = obs.map((p) => p.wind_m_s);
-  const obsGusts = obs.map((p) => p.wind_gust_m_s);
-  const obsRH = obs.map((p) => p.rh);
-  const obsUvi = obs.map((p) => p.uvi);
-  const obsLux = obs.map((p) => p.light_lux);
+  const rangeStart = safeDate(data.range_start) || state.rangeStart;
+  const rangeEnd = safeDate(data.range_end) || state.rangeEnd;
+  const range = { axisStart: rangeStart, axisEnd: rangeEnd };
+
+  const obsFiltered = filterRange(obs, rangeStart, rangeEnd);
+  const forecast = filterRange(forecastAll, rangeStart, rangeEnd);
+
+  const obsTemps = obsFiltered.map((p) => p.temp_c);
+  const obsWinds = obsFiltered.map((p) => p.wind_m_s);
+  const obsGusts = obsFiltered.map((p) => p.wind_gust_m_s);
+  const obsRH = obsFiltered.map((p) => p.rh);
+  const obsUvi = obsFiltered.map((p) => p.uvi);
+  const obsLux = obsFiltered.map((p) => p.light_lux);
 
   const fcTemps = forecast.map((p) => p.temp_c);
   const fcWinds = forecast.map((p) => p.wind_m_s);
@@ -189,17 +311,17 @@ function renderDashboard(data) {
   }
   updateText("forecast-summary", forecastParts.length ? forecastParts.join(" | ") : "--");
 
-  updateText("commentary", buildCommentary(latest, forecast));
+  updateText("commentary", buildCommentary(latest, forecastAll));
 
   const tempChart = {
     type: "line",
     data: {
       datasets: [
-        { label: "obs temp C", data: series(obs, "temp_c"), borderColor: colors.obs },
+        { label: "obs temp C", data: series(obsFiltered, "temp_c"), borderColor: colors.obs },
         { label: "forecast temp C", data: series(forecast, "temp_c"), borderColor: colors.forecast },
       ],
     },
-    options: baseOptions(),
+    options: baseOptions(range),
   };
   upsertChart("chart-temp", tempChart);
 
@@ -207,13 +329,13 @@ function renderDashboard(data) {
     type: "line",
     data: {
       datasets: [
-        { label: "obs wind m/s", data: series(obs, "wind_m_s"), borderColor: colors.obs },
-        { label: "obs gust m/s", data: series(obs, "wind_gust_m_s"), borderColor: colors.gust },
+        { label: "obs wind m/s", data: series(obsFiltered, "wind_m_s"), borderColor: colors.obs },
+        { label: "obs gust m/s", data: series(obsFiltered, "wind_gust_m_s"), borderColor: colors.gust },
         { label: "forecast wind m/s", data: series(forecast, "wind_m_s"), borderColor: colors.forecast },
         { label: "forecast gust m/s", data: series(forecast, "wind_gust_m_s"), borderColor: "#f7d79f" },
       ],
     },
-    options: baseOptions(),
+    options: baseOptions(range),
   };
   upsertChart("chart-wind", windChart);
 
@@ -221,15 +343,15 @@ function renderDashboard(data) {
     type: "line",
     data: {
       datasets: [
-        { label: "obs humidity %", data: series(obs, "rh"), borderColor: colors.humidity },
+        { label: "obs humidity %", data: series(obsFiltered, "rh"), borderColor: colors.humidity },
         { label: "forecast rh %", data: series(forecast, "rh"), borderColor: colors.forecast },
       ],
     },
-    options: baseOptions(),
+    options: baseOptions(range),
   };
   upsertChart("chart-rh", rhChart);
 
-  const lightOptions = baseOptions();
+  const lightOptions = baseOptions(range);
   lightOptions.scales.y1 = {
     position: "right",
     ticks: { color: "#a4c4c4" },
@@ -240,14 +362,33 @@ function renderDashboard(data) {
     type: "line",
     data: {
       datasets: [
-        { label: "uvi", data: series(obs, "uvi"), borderColor: colors.uvi, yAxisID: "y" },
-        { label: "light lux", data: series(obs, "light_lux"), borderColor: colors.light, yAxisID: "y1" },
+        { label: "uvi", data: series(obsFiltered, "uvi"), borderColor: colors.uvi, yAxisID: "y" },
+        { label: "light lux", data: series(obsFiltered, "light_lux"), borderColor: colors.light, yAxisID: "y1" },
       ],
     },
     options: lightOptions,
   };
   upsertChart("chart-light", lightChart);
 
+  const powerOptions = baseOptions(range);
+  powerOptions.scales.y1 = {
+    position: "right",
+    ticks: { color: "#a4c4c4" },
+    grid: { drawOnChartArea: false },
+  };
+
+  const powerChart = {
+    type: "line",
+    data: {
+      datasets: [
+        { label: "battery mV", data: series(obsFiltered, "battery_mv"), borderColor: colors.obs, yAxisID: "y" },
+        { label: "supercap V", data: series(obsFiltered, "supercap_v"), borderColor: colors.forecast, yAxisID: "y1" },
+      ],
+    },
+    options: powerOptions,
+  };
+  upsertChart("chart-power", powerChart);
+
   const precipChart = {
     type: "bar",
     data: {
@@ -255,7 +396,7 @@ function renderDashboard(data) {
         { label: "forecast precip mm", data: series(forecast, "precip_mm"), backgroundColor: colors.precip },
       ],
     },
-    options: baseOptions(),
+    options: baseOptions(range),
   };
   upsertChart("chart-precip", precipChart);
 }
@@ -314,9 +455,15 @@ function buildCommentary(latest, forecast) {
 }
 
 async function loadAndRender() {
+  const range = computeRange(state.range, state.tz);
+  state.rangeStart = range.start;
+  state.rangeEnd = range.end;
+
   const params = new URLSearchParams({
     range: state.range,
     bucket: state.bucket,
+    start: range.start.toISOString(),
+    end: range.end.toISOString(),
   });
   try {
     const resp = await fetch(`/api/dashboard?${params.toString()}`, { cache: "no-store" });
@@ -342,6 +489,16 @@ function setupControls() {
       loadAndRender();
     });
   });
+
+  const tzButtons = document.querySelectorAll(".btn[data-tz]");
+  tzButtons.forEach((btn) => {
+    btn.addEventListener("click", () => {
+      tzButtons.forEach((b) => b.classList.remove("active"));
+      btn.classList.add("active");
+      state.tz = btn.dataset.tz;
+      loadAndRender();
+    });
+  });
 }
 
 document.addEventListener("DOMContentLoaded", () => {
diff --git a/cmd/ingestd/web/index.html b/cmd/ingestd/web/index.html
index 2760f17..a6bdcfe 100644
--- a/cmd/ingestd/web/index.html
+++ b/cmd/ingestd/web/index.html
@@ -17,9 +17,16 @@
         <div class="subtitle" id="site-meta">Loading...</div>
       </div>
       <div class="controls">
-        <button class="btn" data-range="6h">6h</button>
-        <button class="btn active" data-range="24h">24h</button>
-        <button class="btn" data-range="72h">72h</button>
+        <div class="segmented" role="group" aria-label="time range">
+          <button class="btn" data-range="6h">6h</button>
+          <button class="btn active" data-range="24h">24h</button>
+          <button class="btn" data-range="72h">72h</button>
+          <button class="btn" data-range="7d">7d</button>
+        </div>
+        <div class="segmented" role="group" aria-label="timezone">
+          <button class="btn active" data-tz="local">Local</button>
+          <button class="btn" data-tz="utc">UTC</button>
+        </div>
       </div>
     </header>
 
@@ -58,6 +65,14 @@
             <div class="label">Light Lux</div>
             <div class="value" id="live-lux">--</div>
           </div>
+          <div class="metric">
+            <div class="label">Battery mV</div>
+            <div class="value" id="live-battery">--</div>
+          </div>
+          <div class="metric">
+            <div class="label">Supercap V</div>
+            <div class="value" id="live-supercap">--</div>
+          </div>
         </div>
 
         <div class="callouts">
@@ -112,6 +127,12 @@
               <canvas id="chart-light"></canvas>
             </div>
           </div>
+          <div class="chart-card">
+            <div class="chart-title">Battery + Supercap</div>
+            <div class="chart-canvas">
+              <canvas id="chart-power"></canvas>
+            </div>
+          </div>
           <div class="chart-card wide">
             <div class="chart-title">Precipitation (forecast)</div>
             <div class="chart-canvas">
diff --git a/cmd/ingestd/web/styles.css b/cmd/ingestd/web/styles.css
index 1166ee9..761ecf5 100644
--- a/cmd/ingestd/web/styles.css
+++ b/cmd/ingestd/web/styles.css
@@ -53,7 +53,9 @@ body {
 
 .controls {
   display: flex;
-  gap: 10px;
+  gap: 12px;
+  flex-wrap: wrap;
+  align-items: center;
 }
 
 .btn {
@@ -79,6 +81,15 @@ body {
   color: var(--accent);
 }
 
+.segmented {
+  display: inline-flex;
+  border: 1px solid rgba(123, 223, 242, 0.2);
+  border-radius: 999px;
+  padding: 4px;
+  gap: 6px;
+  background: rgba(12, 22, 28, 0.45);
+}
+
 .layout {
   display: grid;
   grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.6fr);
diff --git a/internal/db/series.go b/internal/db/series.go
index a720c96..10148b5 100644
--- a/internal/db/series.go
+++ b/internal/db/series.go
@@ -19,6 +19,8 @@ type ObservationPoint struct {
 	WindDirDeg *float64  `json:"wind_dir_deg,omitempty"`
 	UVI        *float64  `json:"uvi,omitempty"`
 	LightLux   *float64  `json:"light_lux,omitempty"`
+	BatteryMV  *float64  `json:"battery_mv,omitempty"`
+	SupercapV  *float64  `json:"supercap_v,omitempty"`
 }
 
 type ForecastPoint struct {
@@ -38,38 +40,42 @@ type ForecastSeries struct {
 	Points      []ForecastPoint `json:"points"`
 }
 
-func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, rangeSeconds int64) ([]ObservationPoint, error) {
-	if rangeSeconds <= 0 {
-		return nil, errors.New("range must be > 0")
+func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, start, end time.Time) ([]ObservationPoint, error) {
+	if end.Before(start) || end.Equal(start) {
+		return nil, errors.New("invalid time range")
 	}
 
-	table := "cagg_ws90_5m"
+	interval := "5 minutes"
 	switch bucket {
 	case "1m":
-		table = "cagg_ws90_1m"
+		interval = "1 minute"
 	case "5m":
-		table = "cagg_ws90_5m"
+		interval = "5 minutes"
 	default:
 		return nil, fmt.Errorf("unsupported bucket: %s", bucket)
 	}
 
 	query := fmt.Sprintf(`
 		SELECT
-			bucket,
-			temp_c_avg,
-			rh_avg,
-			wind_avg_ms_avg,
-			wind_gust_ms_max,
-			wind_dir_deg_avg,
-			uvi_max,
-			light_lux_max
-		FROM %s
+			time_bucket(INTERVAL '%s', ts) AS bucket,
+			avg(temperature_c) AS temp_c_avg,
+			avg(humidity) AS rh_avg,
+			avg(wind_avg_m_s) AS wind_avg_ms_avg,
+			max(wind_max_m_s) AS wind_gust_ms_max,
+			avg(wind_dir_deg) AS wind_dir_deg_avg,
+			max(uvi) AS uvi_max,
+			max(light_lux) AS light_lux_max,
+			avg(battery_mv) AS battery_mv_avg,
+			avg(supercap_v) AS supercap_v_avg
+		FROM observations_ws90
 		WHERE site = $1
-		  AND bucket >= now() - make_interval(secs => $2)
+		  AND ts >= $2
+		  AND ts <= $3
+		GROUP BY bucket
 		ORDER BY bucket ASC
-	`, table)
+	`, interval)
 
-	rows, err := d.Pool.Query(ctx, query, site, rangeSeconds)
+	rows, err := d.Pool.Query(ctx, query, site, start, end)
 	if err != nil {
 		return nil, err
 	}
@@ -78,11 +84,11 @@ func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, rangeSe
 	points := make([]ObservationPoint, 0, 512)
 	for rows.Next() {
 		var (
-			ts                   time.Time
-			temp, rh, wind, gust sql.NullFloat64
-			dir, uvi, light      sql.NullFloat64
+			ts                                 time.Time
+			temp, rh, wind, gust               sql.NullFloat64
+			dir, uvi, light, battery, supercap sql.NullFloat64
 		)
-		if err := rows.Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light); err != nil {
+		if err := rows.Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light, &battery, &supercap); err != nil {
 			return nil, err
 		}
 		points = append(points, ObservationPoint{
@@ -94,6 +100,8 @@ func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, rangeSe
 			WindDirDeg: nullFloatPtr(dir),
 			UVI:        nullFloatPtr(uvi),
 			LightLux:   nullFloatPtr(light),
+			BatteryMV:  nullFloatPtr(battery),
+			SupercapV:  nullFloatPtr(supercap),
 		})
 	}
 	if rows.Err() != nil {
@@ -113,7 +121,9 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
 			wind_max_m_s,
 			wind_dir_deg,
 			uvi,
-			light_lux
+			light_lux,
+			battery_mv,
+			supercap_v
 		FROM observations_ws90
 		WHERE site = $1
 		ORDER BY ts DESC
@@ -121,11 +131,11 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
 	`
 
 	var (
-		ts                   time.Time
-		temp, rh, wind, gust sql.NullFloat64
-		dir, uvi, light      sql.NullFloat64
+		ts                                 time.Time
+		temp, rh, wind, gust               sql.NullFloat64
+		dir, uvi, light, battery, supercap sql.NullFloat64
 	)
-	err := d.Pool.QueryRow(ctx, query, site).Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light)
+	err := d.Pool.QueryRow(ctx, query, site).Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light, &battery, &supercap)
 	if err != nil {
 		if errors.Is(err, pgx.ErrNoRows) {
 			return nil, nil
@@ -142,6 +152,8 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
 		WindDirDeg: nullFloatPtr(dir),
 		UVI:        nullFloatPtr(uvi),
 		LightLux:   nullFloatPtr(light),
+		BatteryMV:  nullFloatPtr(battery),
+		SupercapV:  nullFloatPtr(supercap),
 	}, nil
 }