diff --git a/apps/predbat/inverter.py b/apps/predbat/inverter.py
index 23d49f7e2..7689fa5de 100644
--- a/apps/predbat/inverter.py
+++ b/apps/predbat/inverter.py
@@ -472,7 +472,7 @@ def __init__(self, base, id=0, quiet=False, rest_postCommand=None, rest_getData=
             self.reserve_min = battery_min_soc
 
         self.base.log("Reserve min: {}%, battery_min: {}%".format(self.reserve_min, dp0(battery_min_soc)))
-        if self.base.set_reserve_enable and self.inv_has_reserve_soc:
+        if (self.base.set_reserve_enable and self.inv_has_reserve_soc) or not self.inv_has_reserve_soc:
             self.reserve_percent = self.reserve_min
         else:
             self.reserve_percent = self.reserve_percent_current
diff --git a/apps/predbat/tests/test_inverter.py b/apps/predbat/tests/test_inverter.py
index 3e6ee62fa..e6d1346e7 100644
--- a/apps/predbat/tests/test_inverter.py
+++ b/apps/predbat/tests/test_inverter.py
@@ -220,7 +220,7 @@ def test_adjust_charge_window(
     return failed
 
 
-def test_adjust_reserve(test_name, ha, inv, dummy_rest, prev_reserve, reserve, expect_reserve=None, reserve_min=4, reserve_max=100):
+def test_adjust_reserve(test_name, ha, inv, dummy_rest, prev_reserve, reserve, expect_reserve=None, reserve_min=4, reserve_max=100, reserve_percent=None):
     """
     Test
        inv.adjust_reserve(self, reserve):
@@ -229,7 +229,12 @@ def test_adjust_reserve(test_name, ha, inv, dummy_rest, prev_reserve, reserve, e
     if expect_reserve is None:
         expect_reserve = reserve
 
-    inv.reserve_percent = reserve_min
+    # reserve_percent simulates the current planning floor (may differ from reserve_min for
+    # inverters where inv_has_reserve_soc is False, e.g. SolisCloud where the sensor can be "stuck" high)
+    if reserve_percent is None:
+        reserve_percent = reserve_min
+    inv.reserve_percent = reserve_percent
+    inv.reserve_min = reserve_min
     inv.reserve_max = reserve_max
 
     print("Test: {}".format(test_name))