diff --git a/pyasic/config/mining.py b/pyasic/config/mining.py
index 2c8719db..77a6a1f6 100644
--- a/pyasic/config/mining.py
+++ b/pyasic/config/mining.py
@@ -156,6 +156,7 @@ class VOptAlgo(MinerConfigValue):
         return "VoltageOptimizer"
 
 
+@dataclass
 class ChipTuneAlgo(MinerConfigValue):
     mode: str = field(init=False, default="chip_tune")
 
@@ -249,6 +250,8 @@ class MiningModePowerTune(MinerConfigValue):
 class MiningModeHashrateTune(MinerConfigValue):
     mode: str = field(init=False, default="hashrate_tuning")
     hashrate: int = None
+    throttle_limit: int = None
+    throttle_step: int = None
     algo: TunerAlgo = field(default_factory=TunerAlgo.default)
 
     @classmethod
@@ -256,6 +259,10 @@ class MiningModeHashrateTune(MinerConfigValue):
         cls_conf = {}
         if dict_conf.get("hashrate"):
             cls_conf["hashrate"] = dict_conf["hashrate"]
+        if dict_conf.get("throttle_limit"):
+            cls_conf["throttle_limit"] = dict_conf["throttle_limit"]
+        if dict_conf.get("throttle_step"):
+            cls_conf["throttle_step"] = dict_conf["throttle_step"]
         if dict_conf.get("algo"):
             cls_conf["algo"] = TunerAlgo.from_dict(dict_conf["algo"])
 
@@ -292,7 +299,17 @@ class MiningModeHashrateTune(MinerConfigValue):
         return {"mode": {"mode": "custom", "tune": "ths", "ths": self.hashrate}}
 
     def as_epic(self) -> dict:
-        return {"ptune": {"algo": self.algo.as_epic(), "target": self.hashrate}}
+        mode = {
+            "ptune": {
+                "algo": self.algo.as_epic(),
+                "target": self.hashrate,
+            }
+        }
+        if self.throttle_limit is not None:
+            mode["ptune"]["min_throttle"] = self.throttle_limit
+        if self.throttle_step is not None:
+            mode["ptune"]["throttle_step"] = self.throttle_step
+        return mode
 
     def as_mara(self) -> dict:
         return {
@@ -416,13 +433,19 @@ class MiningModeConfig(MinerConfigOption):
                 algo_info = web_conf["PerpetualTune"]["Algorithm"]
                 if algo_info.get("VoltageOptimizer") is not None:
                     return cls.hashrate_tuning(
-                        hashrate=algo_info["VoltageOptimizer"]["Target"],
-                        algo=TunerAlgo.voltage_optimizer,
+                        hashrate=algo_info["VoltageOptimizer"].get("Target"),
+                        throttle_limit=algo_info["VoltageOptimizer"].get(
+                            "Min Throttle Target"
+                        ),
+                        throttle_step=algo_info["VoltageOptimizer"].get(
+                            "Throttle Step"
+                        ),
+                        algo=TunerAlgo.voltage_optimizer(),
                     )
                 else:
                     return cls.hashrate_tuning(
                         hashrate=algo_info["ChipTune"]["Target"],
-                        algo=TunerAlgo.chip_tune,
+                        algo=TunerAlgo.chip_tune(),
                     )
             else:
                 return cls.normal()
diff --git a/pyasic/config/temperature.py b/pyasic/config/temperature.py
index b5674f31..e8720add 100644
--- a/pyasic/config/temperature.py
+++ b/pyasic/config/temperature.py
@@ -49,7 +49,9 @@ class TemperatureConfig(MinerConfigValue):
         else:
             temps_config["fans"]["Auto"]["Target Temperature"] = 60
         if self.danger is not None:
-            temps_config["temps"]["shutdown"] = self.danger
+            temps_config["temps"]["critical"] = self.danger
+        if self.hot is not None:
+            temps_config["temps"]["shutdown"] = self.hot
         return temps_config
 
     @classmethod
@@ -74,16 +76,20 @@ class TemperatureConfig(MinerConfigValue):
     @classmethod
     def from_epic(cls, web_conf: dict) -> "TemperatureConfig":
         try:
-            dangerous_temp = web_conf["Misc"]["Shutdown Temp"]
+            dangerous_temp = web_conf["Misc"]["Critical Temp"]
         except KeyError:
             dangerous_temp = None
+        try:
+            hot_temp = web_conf["Misc"]["Shutdown Temp"]
+        except KeyError:
+            hot_temp = None
         # Need to do this in two blocks to avoid KeyError if one is missing
         try:
             target_temp = web_conf["Fans"]["Fan Mode"]["Auto"]["Target Temperature"]
         except KeyError:
             target_temp = None
 
-        return cls(target=target_temp, danger=dangerous_temp)
+        return cls(target=target_temp, hot=hot_temp, danger=dangerous_temp)
 
     @classmethod
     def from_vnish(cls, web_settings: dict) -> "TemperatureConfig":
diff --git a/pyasic/data/__init__.py b/pyasic/data/__init__.py
index 8051ea1d..6499ede1 100644
--- a/pyasic/data/__init__.py
+++ b/pyasic/data/__init__.py
@@ -50,6 +50,7 @@ class MinerData:
         temperature_avg: The average temperature across the boards.  Calculated automatically.
         env_temp: The environment temps as a float.
         wattage: Current power draw of the miner as an int.
+        voltage: Current output voltage of the PSU as an float.
         wattage_limit: Power limit of the miner as an int.
         fans: A list of fans on the miner with their speeds.
         fan_psu: The speed of the PSU on the fan if the miner collects it.
@@ -84,6 +85,7 @@ class MinerData:
     env_temp: float = None
     wattage: int = None
     wattage_limit: int = field(init=False)
+    voltage: float = None
     _wattage_limit: int = field(repr=False, default=None)
     fans: List[Fan] = field(default_factory=list)
     fan_psu: int = None
diff --git a/pyasic/miners/backends/epic.py b/pyasic/miners/backends/epic.py
index ff74e135..79972749 100644
--- a/pyasic/miners/backends/epic.py
+++ b/pyasic/miners/backends/epic.py
@@ -58,6 +58,10 @@ EPIC_DATA_LOC = DataLocations(
             "_get_wattage",
             [WebAPICommand("web_summary", "summary")],
         ),
+        str(DataOptions.VOLTAGE): DataFunction(
+            "_get_voltage",
+            [WebAPICommand("web_summary", "summary")],
+        ),
         str(DataOptions.FANS): DataFunction(
             "_get_fans",
             [WebAPICommand("web_summary", "summary")],
@@ -119,6 +123,7 @@ class ePIC(BaseMiner):
             # Temps
             if not conf.get("temps", {}) == {}:
                 await self.web.set_shutdown_temp(conf["temps"]["shutdown"])
+                await self.web.set_critical_temp(conf["temps"]["critical"])
             # Fans
             # set with sub-keys instead of conf["fans"] because sometimes both can be set
             if not conf["fans"].get("Manual", {}) == {}:
@@ -129,7 +134,7 @@ class ePIC(BaseMiner):
             # Mining Mode -- Need to handle that you may not be able to change while miner is tuning
             if conf["ptune"].get("enabled", True):
                 await self.web.set_ptune_enable(True)
-                await self.web.set_ptune_algo(**conf["ptune"])
+                await self.web.set_ptune_algo(conf["ptune"])
 
             ## Pools
             await self.web.set_pools(conf["pools"])
@@ -216,6 +221,20 @@ class ePIC(BaseMiner):
             except KeyError:
                 pass
 
+    async def _get_voltage(self, web_summary: dict = None) -> Optional[float]:
+        if web_summary is None:
+            try:
+                web_summary = await self.web.summary()
+            except APIError:
+                pass
+
+        if web_summary is not None:
+            try:
+                voltage = web_summary["Power Supply Stats"]["Output Voltage"]
+                return voltage
+            except KeyError:
+                pass
+
     async def _get_hashrate(self, web_summary: dict = None) -> Optional[float]:
         if web_summary is None:
             try:
@@ -306,16 +325,27 @@ class ePIC(BaseMiner):
             HashBoard(slot=i, expected_chips=self.expected_chips)
             for i in range(self.expected_hashboards)
         ]
-        if web_summary.get("HBs") is not None:
-            for hb in web_summary["HBs"]:
-                num_of_chips = web_capabilities["Performance Estimator"]["Chip Count"]
-                hashrate = hb["Hashrate"][0]
-                # Update the Hashboard object
-                hb_list[hb["Index"]].missing = False
-                hb_list[hb["Index"]].hashrate = round(hashrate / 1000000, 2)
-                hb_list[hb["Index"]].chips = num_of_chips
-                hb_list[hb["Index"]].temp = hb["Temperature"]
-        return hb_list
+        if web_summary is not None and web_capabilities is not None:
+            if web_summary.get("HBs") is not None:
+                for hb in web_summary["HBs"]:
+                    if web_capabilities.get("Performance Estimator") is not None:
+                        num_of_chips = web_capabilities["Performance Estimator"][
+                            "Chip Count"
+                        ]
+                    else:
+                        num_of_chips = self.expected_chips
+                    if web_capabilities.get("Board Serial Numbers") is not None:
+                        if hb["Index"] < len(web_capabilities["Board Serial Numbers"]):
+                            hb_list[hb["Index"]].serial_number = web_capabilities[
+                                "Board Serial Numbers"
+                            ][hb["Index"]]
+                    hashrate = hb["Hashrate"][0]
+                    # Update the Hashboard object
+                    hb_list[hb["Index"]].missing = False
+                    hb_list[hb["Index"]].hashrate = round(hashrate / 1000000, 2)
+                    hb_list[hb["Index"]].chips = num_of_chips
+                    hb_list[hb["Index"]].temp = hb["Temperature"]
+            return hb_list
 
     async def _is_mining(self, web_summary, *args, **kwargs) -> Optional[bool]:
         if web_summary is None:
diff --git a/pyasic/miners/base.py b/pyasic/miners/base.py
index 0126b59c..82d63a33 100644
--- a/pyasic/miners/base.py
+++ b/pyasic/miners/base.py
@@ -249,6 +249,14 @@ class MinerProtocol(Protocol):
         """
         return await self._get_wattage()
 
+    async def get_voltage(self) -> Optional[float]:
+        """Get output voltage of the PSU as a float.
+
+        Returns:
+            Output voltage of the PSU as an float.
+        """
+        return await self._get_voltage()
+
     async def get_wattage_limit(self) -> Optional[int]:
         """Get wattage limit from the miner as an int.
 
@@ -337,6 +345,9 @@ class MinerProtocol(Protocol):
     async def _get_wattage(self) -> Optional[int]:
         pass
 
+    async def _get_voltage(self) -> Optional[float]:
+        pass
+
     async def _get_wattage_limit(self) -> Optional[int]:
         pass
 
diff --git a/pyasic/miners/data.py b/pyasic/miners/data.py
index a21ccd16..9618e008 100644
--- a/pyasic/miners/data.py
+++ b/pyasic/miners/data.py
@@ -37,6 +37,7 @@ class DataOptions(Enum):
     IS_MINING = "is_mining"
     UPTIME = "uptime"
     CONFIG = "config"
+    VOLTAGE = "voltage"
 
     def __str__(self):
         return self.value
diff --git a/pyasic/web/epic.py b/pyasic/web/epic.py
index dd4107ca..8f0e1b41 100644
--- a/pyasic/web/epic.py
+++ b/pyasic/web/epic.py
@@ -97,6 +97,9 @@ class ePICWebAPI(BaseWebAPI):
     async def set_shutdown_temp(self, params: int) -> dict:
         return await self.send_command("shutdowntemp", param=params)
 
+    async def set_critical_temp(self, params: int) -> dict:
+        return await self.send_command("criticaltemp", param=params)
+
     async def set_fan(self, params: dict) -> dict:
         return await self.send_command("fanspeed", param=params)