battery voltage monitor

csharp/App/Backend/Controller.cs

@@ -3061,6 +3061,45 @@ public class Controller : ControllerBase
         return Ok(summaries);
     }
 
+    // ── Battery full-charge low-voltage anomaly (temporary diagnostic) ──
+
+    [HttpGet(nameof(GetBatteryVoltageAnomalySummary))]
+    public ActionResult<IEnumerable<Object>> GetBatteryVoltageAnomalySummary(Token authToken)
+    {
+        var user = Db.GetSession(authToken)?.User;
+        if (user is null || user.UserType != 2) return Unauthorized();
+
+        // DetectedAt is "yyyy-MM-dd HH:mm:ss" — fixed-width, so lexicographic == chronological.
+        // If the format ever changes, this ordering breaks silently.
+        var summary = Db.BatteryVoltageAnomalies
+            .ToList()
+            .GroupBy(a => a.InstallationId)
+            .Select(g =>
+            {
+                var latest = g.OrderByDescending(a => a.DetectedAt).First();
+                return new
+                {
+                    installationId = g.Key,
+                    lastDetectedAt = latest.DetectedAt,
+                    lastVoltage    = latest.Voltage,
+                    lastBattery    = latest.BatteryLabel,
+                    count          = g.Count()
+                };
+            })
+            .ToList();
+
+        return Ok(summary);
+    }
+
+    [HttpGet(nameof(GetBatteryVoltageAnomalyLog))]
+    public ActionResult<IEnumerable<BatteryVoltageAnomaly>> GetBatteryVoltageAnomalyLog(Int64 installationId, Token authToken)
+    {
+        var user = Db.GetSession(authToken)?.User;
+        if (user is null || user.UserType != 2) return Unauthorized();
+
+        return Ok(Db.GetBatteryVoltageAnomalies(installationId));
+    }
+
     // ── On-Site Installer Checklist (sodistore home only) ──────────────
 
     [HttpGet(nameof(GetOnSiteChecklistForInstallation))]

csharp/App/Backend/DataTypes/BatteryVoltageAnomaly.cs

@@ -0,0 +1,30 @@
+using SQLite;
+
+namespace InnovEnergy.App.Backend.DataTypes;
+
+// Temporary diagnostic: one row per battery cluster per hour where SOC=100% & pack voltage < 58V
+// ("BMS fake-full"). When this feature is no longer needed, drop the table, this type,
+// BatteryVoltageCheckService, BatteryVoltageAnomalyDetector, the two endpoints, the Db.cs
+// CreateTable entries (main + fileConnection), and the related Create/Read/Delete helpers.
+public class BatteryVoltageAnomaly
+{
+    [PrimaryKey, AutoIncrement]
+    public Int64  Id             { get; set; }
+
+    [Indexed]
+    public Int64  InstallationId { get; set; }
+
+    public String BatteryLabel   { get; set; } = "";
+
+    public String DetectedAt     { get; set; } = "";
+
+    [Indexed]
+    public String Date           { get; set; } = "";
+
+    public String DateHour       { get; set; } = "";
+
+    public Double Voltage        { get; set; }
+    public Double Soc            { get; set; }
+
+    public String CreatedAt      { get; set; } = "";
+}

csharp/App/Backend/Database/Create.cs

@@ -47,7 +47,12 @@ public static partial class Db
     {
         return Insert(session);
     }
-    
+
+    public static Boolean Create(BatteryVoltageAnomaly anomaly)
+    {
+        return Insert(anomaly);
+    }
+
     public static Boolean Create(InstallationAccess installationAccess)
     {
         return Insert(installationAccess);

csharp/App/Backend/Database/Db.cs

@@ -50,6 +50,9 @@ public static partial class Db
     public static TableQuery<OnSiteChecklistItem>      OnSiteChecklistItems      => Connection.Table<OnSiteChecklistItem>();
     public static TableQuery<OnSiteChecklistSignature> OnSiteChecklistSignatures => Connection.Table<OnSiteChecklistSignature>();
 
+    // Battery full-charge low-voltage anomaly log (temporary diagnostic)
+    public static TableQuery<BatteryVoltageAnomaly>    BatteryVoltageAnomalies   => Connection.Table<BatteryVoltageAnomaly>();
+
 
     public static void Init()
     {
@@ -98,6 +101,9 @@ public static partial class Db
             // On-site installer checklist (sodistore home)
             Connection.CreateTable<OnSiteChecklistItem>();
             Connection.CreateTable<OnSiteChecklistSignature>();
+
+            // Battery full-charge low-voltage anomaly log (temporary diagnostic)
+            Connection.CreateTable<BatteryVoltageAnomaly>();
         });
         
         // One-time migration: normalize legacy long-form language values to ISO codes
@@ -281,6 +287,9 @@ public static partial class Db
         fileConnection.CreateTable<OnSiteChecklistItem>();
         fileConnection.CreateTable<OnSiteChecklistSignature>();
 
+        // Battery full-charge low-voltage anomaly log (temporary diagnostic)
+        fileConnection.CreateTable<BatteryVoltageAnomaly>();
+
         // Migrate new columns: set defaults for existing rows where NULL or empty
         fileConnection.Execute("UPDATE Installation SET ExternalEms = 'No' WHERE ExternalEms IS NULL OR ExternalEms = ''");
         fileConnection.Execute("UPDATE Installation SET InstallationModel = '' WHERE InstallationModel IS NULL");

csharp/App/Backend/Database/Delete.cs

@@ -375,4 +375,9 @@ public static partial class Db
         Backup();
         Console.WriteLine($"[Db] Cleanup: {oldDailyIds.Count} daily, {oldHourlyIds.Count} hourly, {oldWeeklyIds.Count} weekly, {oldMonthlyIds.Count} monthly, {oldCacheIds.Count} insight cache records deleted (cutoff {cutoff}).");
     }
+
+    public static void DeleteBatteryVoltageAnomaliesBefore(String isoDate)
+    {
+        Connection.Execute("DELETE FROM BatteryVoltageAnomaly WHERE Date < ?", isoDate);
+    }
 }

csharp/App/Backend/Database/Read.cs

@@ -272,4 +272,19 @@ public static partial class Db
 
     public static OnSiteChecklistSignature? GetOnSiteChecklistSignature(Int64 installationId)
         => OnSiteChecklistSignatures.FirstOrDefault(s => s.InstallationId == installationId);
+
+    // ── BatteryVoltageAnomaly Queries (temporary diagnostic) ────────────
+
+    public static Boolean BatteryVoltageAnomalyExists(Int64 installationId, String batteryLabel, String dateHour)
+        => BatteryVoltageAnomalies.Any(a =>
+            a.InstallationId == installationId &&
+            a.BatteryLabel   == batteryLabel   &&
+            a.DateHour       == dateHour);
+
+    public static List<BatteryVoltageAnomaly> GetBatteryVoltageAnomalies(Int64 installationId)
+        => BatteryVoltageAnomalies
+            .Where(a => a.InstallationId == installationId)
+            .ToList()
+            .OrderByDescending(a => a.DetectedAt)
+            .ToList();
 }

csharp/App/Backend/Program.cs

@@ -36,6 +36,7 @@ public static class Program
         AlarmReviewService.StartDailyScheduler();
         DailyIngestionService.StartScheduler();
         ReportAggregationService.StartScheduler();
+        BatteryVoltageCheckService.StartScheduler();
         var builder = WebApplication.CreateBuilder(args);
         
         RabbitMqManager.InitializeEnvironment();

csharp/App/Backend/Services/BatteryVoltageAnomalyDetector.cs

@@ -0,0 +1,113 @@
+using System.Text;
+using System.Text.Json;
+
+namespace InnovEnergy.App.Backend.Services;
+
+public readonly record struct VoltageAnomaly(String BatteryLabel, Double Soc, Double Voltage, DateTime? Timestamp);
+
+public static class BatteryVoltageAnomalyDetector
+{
+    private const Double FullSoc        = 100.0;
+    private const Double LowVoltageVolt = 58.0;
+    private const Int32  MaxClusters    = 8;
+
+    public static List<VoltageAnomaly> Detect(String liveJson, Int32 device)
+    {
+        var decoded = Decode(liveJson);
+        using var doc = JsonDocument.Parse(decoded);
+        var root = Unwrap(doc.RootElement);
+        var ts   = ReadTimestamp(root);
+
+        return device switch
+        {
+            3 => DetectGrowatt(root, ts),
+            4 => DetectSinexcel(root, ts),
+            _ => new List<VoltageAnomaly>(),
+        };
+    }
+
+    private static List<VoltageAnomaly> DetectSinexcel(JsonElement root, DateTime? ts)
+    {
+        var found = new List<VoltageAnomaly>();
+        if (!root.TryGetProperty("Devices", out var devices) || devices.ValueKind != JsonValueKind.Object)
+        {
+            Console.WriteLine("[BattVoltage] Sinexcel JSON has no Devices node — check live-file shape assumption.");
+            return found;
+        }
+
+        foreach (var dev in devices.EnumerateObject())
+        {
+            for (var cl = 1; cl <= MaxClusters; cl++)
+            {
+                // Battery1 uses "SocSecondvalue" (capital S), Battery2 uses "Socsecondvalue"
+                // (lowercase s) per the documented live-data schema; try both casings.
+                var soc = ReadDouble(dev.Value, $"Battery{cl}Soc")
+                       ?? ReadDouble(dev.Value, $"Battery{cl}SocSecondvalue")
+                       ?? ReadDouble(dev.Value, $"Battery{cl}Socsecondvalue");
+                var v   = ReadDouble(dev.Value, $"Battery{cl}PackTotalVoltage");
+                if (soc is null || v is null) continue;
+                if (IsAnomaly(soc.Value, v.Value))
+                    found.Add(new VoltageAnomaly($"Inv{dev.Name}/Bat{cl}", soc.Value, v.Value, ts));
+            }
+        }
+        return found;
+    }
+
+    private static List<VoltageAnomaly> DetectGrowatt(JsonElement root, DateTime? ts)
+    {
+        var found = new List<VoltageAnomaly>();
+        for (var i = 1; i <= MaxClusters; i++)
+        {
+            var soc = ReadDouble(root, $"Battery{i}Soc");
+            var v   = ReadDouble(root, $"Battery{i}Voltage");
+            if (soc is null || v is null) continue;
+            if (IsAnomaly(soc.Value, v.Value))
+                found.Add(new VoltageAnomaly($"Bat{i}", soc.Value, v.Value, ts));
+        }
+        return found;
+    }
+
+    private static Boolean IsAnomaly(Double soc, Double v) => soc >= FullSoc && v < LowVoltageVolt;
+
+    private static Double? ReadDouble(JsonElement e, String name)
+    {
+        if (!e.TryGetProperty(name, out var p)) return null;
+        if (p.ValueKind == JsonValueKind.Number && p.TryGetDouble(out var d)) return d;
+        if (p.ValueKind == JsonValueKind.String &&
+            Double.TryParse(p.GetString(), System.Globalization.NumberStyles.Float,
+                            System.Globalization.CultureInfo.InvariantCulture, out var ds)) return ds;
+        return null;
+    }
+
+    private static DateTime? ReadTimestamp(JsonElement e)
+    {
+        if (!e.TryGetProperty("Timestamp", out var p)) return null;
+        if (p.ValueKind == JsonValueKind.String && p.TryGetDateTime(out var dt))
+        {
+            // Unspecified-Kind (no offset in source) is assumed UTC; otherwise convert.
+            // Without this, downstream ToString("yyyy-MM-dd HH") prints local-time for
+            // some sources and UTC for others, breaking the (..., DateHour) dedup key
+            // and the cleanup-cutoff comparison.
+            return dt.Kind == DateTimeKind.Unspecified
+                ? DateTime.SpecifyKind(dt, DateTimeKind.Utc)
+                : dt.ToUniversalTime();
+        }
+        if (p.ValueKind == JsonValueKind.Number && p.TryGetInt64(out var unix))
+            return DateTimeOffset.FromUnixTimeSeconds(unix).UtcDateTime;
+        return null;
+    }
+
+    private static JsonElement Unwrap(JsonElement root)
+        => root.ValueKind == JsonValueKind.Object &&
+           root.TryGetProperty("InverterRecord", out var inner)
+            ? inner
+            : root;
+
+    private static String Decode(String raw)
+    {
+        var t = raw.Trim();
+        if (t.StartsWith('{') || t.StartsWith('[')) return raw;
+        try { return Encoding.UTF8.GetString(Convert.FromBase64String(t)); }
+        catch { return raw; }
+    }
+}

csharp/App/Backend/Services/BatteryVoltageCheckService.cs

@@ -0,0 +1,144 @@
+using InnovEnergy.App.Backend.Database;
+using InnovEnergy.App.Backend.DataTypes;
+using InnovEnergy.App.Backend.DataTypes.Methods;
+using InnovEnergy.Lib.S3Utils;
+using InnovEnergy.Lib.S3Utils.DataTypes;
+using S3Region = InnovEnergy.Lib.S3Utils.DataTypes.S3Region;
+
+namespace InnovEnergy.App.Backend.Services;
+
+public static class BatteryVoltageCheckService
+{
+    private static Timer? _timer;
+    private const Int32 WindowStartUtc = 8;
+    private const Int32 WindowEndUtc   = 17;
+    private const Int32 RetentionDays  = 90;
+    private const Int64 MinUnixTs      = 1_000_000_000L;
+
+    public static void StartScheduler()
+    {
+        _timer = new Timer(_ =>
+        {
+            try { RunOnce().GetAwaiter().GetResult(); }
+            catch (Exception ex) { Console.Error.WriteLine($"[BattVoltage] Scheduler error: {ex.Message}"); }
+        }, null, TimeSpan.FromMinutes(1), TimeSpan.FromMinutes(30));
+
+        Console.WriteLine($"[BattVoltage] Scheduler started (every 30 min, UTC {WindowStartUtc:00}:00–{WindowEndUtc:00}:00).");
+    }
+
+    private static async Task RunOnce()
+    {
+        // Retention runs regardless of the midday window — otherwise a backend whose
+        // uptime never overlaps 08–17 UTC (frequent evening restarts) never prunes.
+        CleanupOld();
+
+        var hour = DateTime.UtcNow.Hour;
+        if (hour < WindowStartUtc || hour >= WindowEndUtc) return;
+
+        var installations = Db.Installations
+            .Where(i => (i.Product == (Int32)ProductType.SodioHome ||
+                         i.Product == (Int32)ProductType.SodistorePro)
+                        && i.DataCollectionEnabled)
+            .ToList();
+
+        var total = 0;
+        foreach (var inst in installations)
+        {
+            try { total += await CheckInstallation(inst); }
+            catch (Exception ex) { Console.Error.WriteLine($"[BattVoltage] Inst {inst.Id} failed: {ex.Message}"); }
+        }
+
+        if (total > 0) Console.WriteLine($"[BattVoltage] Run complete: {total} new anomaly row(s).");
+    }
+
+    private static async Task<Int32> CheckInstallation(Installation inst)
+    {
+        var liveJson = await TryReadNewestLiveFile(inst);
+        if (liveJson is null) return 0;
+
+        List<VoltageAnomaly> anomalies;
+        try { anomalies = BatteryVoltageAnomalyDetector.Detect(liveJson, inst.Device); }
+        catch (Exception ex)
+        {
+            Console.Error.WriteLine($"[BattVoltage] Inst {inst.Id} detect failed: {ex.Message}");
+            return 0;
+        }
+
+        var inserted = 0;
+        foreach (var a in anomalies)
+        {
+            var detected = a.Timestamp ?? DateTime.UtcNow;
+            var dateHour = detected.ToString("yyyy-MM-dd HH");
+            if (Db.BatteryVoltageAnomalyExists(inst.Id, a.BatteryLabel, dateHour)) continue;
+
+            Db.Create(new BatteryVoltageAnomaly
+            {
+                InstallationId = inst.Id,
+                BatteryLabel   = a.BatteryLabel,
+                DetectedAt     = detected.ToString("yyyy-MM-dd HH:mm:ss"),
+                Date           = detected.ToString("yyyy-MM-dd"),
+                DateHour       = dateHour,
+                Voltage        = Math.Round(a.Voltage, 2),
+                Soc            = a.Soc,
+                CreatedAt      = DateTime.UtcNow.ToString("o"),
+            });
+            inserted++;
+            Console.WriteLine($"[BattVoltage] Inst {inst.Id} {a.BatteryLabel}: SOC {a.Soc} @ {a.Voltage:F2}V");
+        }
+        return inserted;
+    }
+
+    private static async Task<String?> TryReadNewestLiveFile(Installation inst)
+    {
+        try
+        {
+            var region  = new S3Region($"https://{inst.S3Region}.{inst.S3Provider}", ExoCmd.S3Credentials!);
+            var bucket  = region.Bucket(inst.BucketName());
+
+            // Prefix-scope to recent files: first 5 digits of current unix-ts covers
+            // a ~27h window (vs a full-bucket scan of potentially 100k+ objects on
+            // 10-second cadence). At a digit boundary we may briefly miss until next
+            // poll — acceptable for a 30-min temporary diagnostic.
+            var nowTs  = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
+            var prefix = (nowTs / 100_000L).ToString();
+
+            S3Url? newest   = null;
+            var    newestTs = Int64.MinValue;
+
+            await foreach (var url in bucket.ListObjects(prefix))
+            {
+                if (!TryParseUnixTs(url.Path, out var ts)) continue;
+                if (ts <= newestTs) continue;
+                newestTs = ts;
+                newest   = url;
+            }
+
+            if (newest is null) return null;
+            return await newest.GetObjectAsString();
+        }
+        catch (Exception ex)
+        {
+            Console.Error.WriteLine($"[BattVoltage] Inst {inst.Id} S3 read failed: {ex.Message}");
+            return null;
+        }
+    }
+
+    private static Boolean TryParseUnixTs(String path, out Int64 ts)
+    {
+        ts = 0;
+        var slash = path.LastIndexOf('/');
+        var name  = slash >= 0 ? path[(slash + 1)..] : path;
+        var dot   = name.LastIndexOf('.');
+        var stem  = dot > 0 ? name[..dot] : name;
+        if (!Int64.TryParse(stem, out var v)) return false;
+        if (v < MinUnixTs) return false;
+        ts = v;
+        return true;
+    }
+
+    private static void CleanupOld()
+    {
+        var cutoff = DateTime.UtcNow.AddDays(-RetentionDays).ToString("yyyy-MM-dd");
+        Db.DeleteBatteryVoltageAnomaliesBefore(cutoff);
+    }
+}

typescript/frontend-marios2/src/content/dashboards/BatteryView/BatteryViewSodioHome.tsx

@@ -1,5 +1,6 @@
-import React, { useEffect, useMemo, useState } from 'react';
+import React, { useContext, useEffect, useMemo, useState } from 'react';
 import {
+  Card,
   Container,
   Grid,
   Paper,
@@ -24,6 +25,10 @@ import {
   ActiveCluster,
   getActiveClusters
 } from '../Information/installationSetupUtils';
+import { UserContext } from 'src/contexts/userContext';
+import { UserType } from 'src/interfaces/UserTypes';
+import axiosConfig from 'src/Resources/axiosConfig';
+import { BatteryAnomalyLogEntry } from 'src/interfaces/BatteryAnomalyTypes';
 
 interface BatteryViewSodioHomeProps {
   values: JSONRecordData;
@@ -47,6 +52,22 @@ function BatteryViewSodioHome(props: BatteryViewSodioHomeProps) {
 
   const hasDevices = !!inverter?.Devices;
 
+  const { currentUser } = useContext(UserContext);
+  const showAnomalyLog = currentUser?.userType === UserType.admin;
+  const [anomalyLog, setAnomalyLog] = useState<BatteryAnomalyLogEntry[]>([]);
+
+  useEffect(() => {
+    if (!showAnomalyLog || !props.installationId) return;
+    axiosConfig
+      .get('/GetBatteryVoltageAnomalyLog', {
+        params: { installationId: props.installationId }
+      })
+      .then((res) => {
+        if (Array.isArray(res.data)) setAnomalyLog(res.data);
+      })
+      .catch(() => setAnomalyLog([]));
+  }, [showAnomalyLog, props.installationId]);
+
   const activeClusters: ActiveCluster[] = useMemo(() => {
     const parsed = getActiveClusters(batterySerialNumbers || '');
     if (parsed.length > 0) return parsed;
@@ -376,6 +397,67 @@ function BatteryViewSodioHome(props: BatteryViewSodioHomeProps) {
           </TableContainer>
         </Container>
       )}
+      {showAnomalyLog && (
+        <Container maxWidth="lg" sx={{ marginTop: '20px' }}>
+          <Card>
+            <Typography
+              variant="h6"
+              sx={{ padding: '12px 16px', fontWeight: 'bold' }}
+            >
+              <FormattedMessage
+                id="voltageAnomalyLogTitle"
+                defaultMessage="Full-charge low-voltage log"
+              />
+            </Typography>
+            <TableContainer>
+              <Table size="small">
+                <TableHead>
+                  <TableRow>
+                    <TableCell>
+                      <FormattedMessage id="battery" defaultMessage="Battery" />
+                    </TableCell>
+                    <TableCell>
+                      <FormattedMessage
+                        id="voltageAnomalyTime"
+                        defaultMessage="Time"
+                      />
+                    </TableCell>
+                    <TableCell>
+                      <FormattedMessage id="voltage" defaultMessage="Voltage" />
+                    </TableCell>
+                    <TableCell>
+                      <FormattedMessage id="soc" defaultMessage="SOC" />
+                    </TableCell>
+                  </TableRow>
+                </TableHead>
+                <TableBody>
+                  {anomalyLog.length === 0 ? (
+                    <TableRow>
+                      <TableCell colSpan={4} sx={{ textAlign: 'center' }}>
+                        <Typography variant="body2" color="text.secondary">
+                          <FormattedMessage
+                            id="noVoltageAnomalies"
+                            defaultMessage="No anomalies recorded"
+                          />
+                        </Typography>
+                      </TableCell>
+                    </TableRow>
+                  ) : (
+                    anomalyLog.map((entry) => (
+                      <TableRow key={entry.id}>
+                        <TableCell>{entry.batteryLabel}</TableCell>
+                        <TableCell>{entry.detectedAt}</TableCell>
+                        <TableCell>{entry.voltage.toFixed(2)} V</TableCell>
+                        <TableCell>{entry.soc.toFixed(0)} %</TableCell>
+                      </TableRow>
+                    ))
+                  )}
+                </TableBody>
+              </Table>
+            </TableContainer>
+          </Card>
+        </Container>
+      )}
     </>
   );
 }

typescript/frontend-marios2/src/content/dashboards/SodiohomeInstallations/FlatInstallationView.tsx

@@ -19,6 +19,7 @@ import { useLocation, useNavigate } from 'react-router-dom';
 import routes from '../../../Resources/routes.json';
 import CancelIcon from '@mui/icons-material/Cancel';
 import BuildIcon from '@mui/icons-material/Build';
+import WarningAmberIcon from '@mui/icons-material/WarningAmber';
 import { getDeviceTypeName } from '../Information/installationSetupUtils';
 import { UserContext } from 'src/contexts/userContext';
 import { UserType } from 'src/interfaces/UserTypes';
@@ -27,6 +28,10 @@ import {
   CHECKLIST_ENABLED_PRODUCTS,
   ChecklistSummary
 } from 'src/interfaces/ChecklistTypes';
+import {
+  BatteryAnomalySummary,
+  VOLTAGE_ANOMALY_PRODUCTS
+} from 'src/interfaces/BatteryAnomalyTypes';
 import SetupProgress from '../Checklist/SetupProgress';
 
 interface FlatInstallationViewProps {
@@ -44,12 +49,18 @@ const FlatInstallationView = (props: FlatInstallationViewProps) => {
   const showChecklistColumn =
     currentUser?.userType === UserType.admin &&
     CHECKLIST_ENABLED_PRODUCTS.has(props.product ?? -1);
+  const showAnomalyColumn =
+    currentUser?.userType === UserType.admin &&
+    VOLTAGE_ANOMALY_PRODUCTS.has(props.product ?? -1);
   const isListViewPath =
     currentLocation.pathname === baseRoute + 'list' ||
     currentLocation.pathname === baseRoute + routes.list;
   const [progressMap, setProgressMap] = useState<Map<number, ChecklistSummary>>(
     new Map()
   );
+  const [anomalyMap, setAnomalyMap] = useState<Map<number, BatteryAnomalySummary>>(
+    new Map()
+  );
 
   useEffect(() => {
     if (!showChecklistColumn || !isListViewPath) return;
@@ -66,6 +77,21 @@ const FlatInstallationView = (props: FlatInstallationViewProps) => {
       .catch(() => setProgressMap(new Map()));
   }, [showChecklistColumn, isListViewPath]);
 
+  useEffect(() => {
+    if (!showAnomalyColumn || !isListViewPath) return;
+    axiosConfig
+      .get('/GetBatteryVoltageAnomalySummary')
+      .then((res) => {
+        if (!Array.isArray(res.data)) return;
+        const map = new Map<number, BatteryAnomalySummary>();
+        res.data.forEach((s: BatteryAnomalySummary) => {
+          map.set(s.installationId, s);
+        });
+        setAnomalyMap(map);
+      })
+      .catch(() => setAnomalyMap(new Map()));
+  }, [showAnomalyColumn, isListViewPath]);
+
   const sortedInstallations = useMemo(() => {
     return [...props.installations].sort((a, b) => {
       // Data-collection-disabled installations sink below everything (even offline).
@@ -158,6 +184,14 @@ const FlatInstallationView = (props: FlatInstallationViewProps) => {
                       />
                     </TableCell>
                   )}
+                  {showAnomalyColumn && (
+                    <TableCell>
+                      <FormattedMessage
+                        id="batteryVoltageAnomaly"
+                        defaultMessage="Full @ low voltage"
+                      />
+                    </TableCell>
+                  )}
                 </TableRow>
               </TableHead>
               <TableBody>
@@ -335,6 +369,49 @@ const FlatInstallationView = (props: FlatInstallationViewProps) => {
                             })()}
                           </TableCell>
                         )}
+                        {showAnomalyColumn && (
+                          <TableCell>
+                            {(() => {
+                              const a = anomalyMap.get(installation.id);
+                              if (!a) {
+                                return (
+                                  <Typography
+                                    variant="body2"
+                                    color="text.secondary"
+                                    sx={{ fontSize: 'small' }}
+                                  >
+                                    —
+                                  </Typography>
+                                );
+                              }
+                              return (
+                                <div
+                                  style={{
+                                    display: 'flex',
+                                    alignItems: 'center',
+                                    gap: '6px'
+                                  }}
+                                >
+                                  <WarningAmberIcon
+                                    style={{
+                                      width: '20px',
+                                      height: '20px',
+                                      color: '#f7b34d'
+                                    }}
+                                  />
+                                  <Typography
+                                    variant="body2"
+                                    color="text.primary"
+                                    noWrap
+                                    sx={{ fontSize: 'small' }}
+                                  >
+                                    {a.lastDetectedAt} · {a.lastVoltage.toFixed(2)} V
+                                  </Typography>
+                                </div>
+                              );
+                            })()}
+                          </TableCell>
+                        )}
                       </HoverableTableRow>
                     );
                   })}

typescript/frontend-marios2/src/interfaces/BatteryAnomalyTypes.ts

@@ -0,0 +1,21 @@
+export interface BatteryAnomalySummary {
+  installationId: number;
+  lastDetectedAt: string;
+  lastVoltage: number;
+  lastBattery: string;
+  count: number;
+}
+
+export interface BatteryAnomalyLogEntry {
+  id: number;
+  installationId: number;
+  batteryLabel: string;
+  detectedAt: string;
+  date: string;
+  dateHour: string;
+  voltage: number;
+  soc: number;
+  createdAt: string;
+}
+
+export const VOLTAGE_ANOMALY_PRODUCTS = new Set<number>([2, 5]);

typescript/frontend-marios2/src/lang/de.json

@@ -801,6 +801,10 @@
   "checklistStep10Sub3": "Atef kontaktieren, falls externes EMS vorhanden ist",
   "checklistNoAttachments": "Noch keine Datei angehängt.",
   "setupProgress": "Monitor-Onboarding-Fortschritt",
+  "batteryVoltageAnomaly": "Voll bei Unterspannung",
+  "voltageAnomalyLogTitle": "Protokoll: voll bei Unterspannung",
+  "voltageAnomalyTime": "Zeit",
+  "noVoltageAnomalies": "Keine Anomalien erfasst",
   "checklistPhaseEmpty": "Nicht gestartet",
   "checklistPhasePreparation": "Vorbereitung",
   "checklistPhaseOnSite": "Vor Ort",

typescript/frontend-marios2/src/lang/en.json

@@ -549,6 +549,10 @@
   "checklistStep10Sub3": "Contact Atef if there is external EMS",
   "checklistNoAttachments": "No file attached yet.",
   "setupProgress": "Monitor Onboarding Progress",
+  "batteryVoltageAnomaly": "Full @ low voltage",
+  "voltageAnomalyLogTitle": "Full-charge low-voltage log",
+  "voltageAnomalyTime": "Time",
+  "noVoltageAnomalies": "No anomalies recorded",
   "checklistPhaseEmpty": "Not started",
   "checklistPhasePreparation": "Preparation",
   "checklistPhaseOnSite": "On-site",

typescript/frontend-marios2/src/lang/fr.json

@@ -801,6 +801,10 @@
   "checklistStep10Sub3": "Contacter Atef en cas d'EMS externe",
   "checklistNoAttachments": "Aucun fichier joint pour le moment.",
   "setupProgress": "Progression d'onboarding Monitor",
+  "batteryVoltageAnomaly": "Plein à basse tension",
+  "voltageAnomalyLogTitle": "Journal : plein à basse tension",
+  "voltageAnomalyTime": "Heure",
+  "noVoltageAnomalies": "Aucune anomalie enregistrée",
   "checklistPhaseEmpty": "Non commencé",
   "checklistPhasePreparation": "Préparation",
   "checklistPhaseOnSite": "Sur site",

typescript/frontend-marios2/src/lang/it.json

@@ -801,6 +801,10 @@
   "checklistStep10Sub3": "Contattare Atef se è presente un EMS esterno",
   "checklistNoAttachments": "Nessun file allegato.",
   "setupProgress": "Avanzamento onboarding Monitor",
+  "batteryVoltageAnomaly": "Pieno a bassa tensione",
+  "voltageAnomalyLogTitle": "Registro: pieno a bassa tensione",
+  "voltageAnomalyTime": "Ora",
+  "noVoltageAnomalies": "Nessuna anomalia registrata",
   "checklistPhaseEmpty": "Non avviato",
   "checklistPhasePreparation": "Preparazione",
   "checklistPhaseOnSite": "In sito",