diff --git a/Cargo.lock b/Cargo.lock
index d0ebc50..4850e8e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -485,6 +485,12 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "crunchy"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -849,6 +855,16 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc52e53916c08643f1b56ec082790d1e86a32e58dc5268f897f313fbae7b4872"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crunchy",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.3"
@@ -2538,11 +2554,12 @@ dependencies = [
 
 [[package]]
 name = "tesla-charge-controller"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "chrono",
  "clap 4.4.11",
  "env_logger 0.10.1",
+ "half",
  "if_chain",
  "include_dir",
  "lazy_static 1.4.0",
diff --git a/Cargo.toml b/Cargo.toml
index 7ff57f5..c4e530d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tesla-charge-controller"
-version = "1.1.0"
+version = "1.1.1"
 edition = "2021"
 license = "MITNFA"
 description = "Controls Tesla charge rate based on solar charge data"
@@ -31,3 +31,4 @@ libmodbus-rs = "0.8.3"
 if_chain = "1.0.2"
 notify-debouncer-mini = { version = "0.4.1", default-features = false }
 lazy_static = "1.4"
+half = "2.3"
diff --git a/src/charge_controllers/tristar.rs b/src/charge_controllers/tristar.rs
index 9c0281e..41e46e8 100644
--- a/src/charge_controllers/tristar.rs
+++ b/src/charge_controllers/tristar.rs
@@ -1,7 +1,10 @@
 use libmodbus_rs::{Modbus, ModbusClient, ModbusRTU};
 use prometheus::core::{AtomicI64, GenericGauge};
 
-use crate::{charge_controllers::gauges::*, errors::TristarError};
+use crate::{
+    charge_controllers::gauges::*,
+    errors::{PrintErrors, TristarError},
+};
 
 const DEVICE_ID: u8 = 0x01;
 const RAM_DATA_SIZE: u16 = 0x005B;
@@ -51,7 +54,7 @@ pub struct TristarState {
     battery_voltage: f64,
     target_voltage: f64,
     input_current: f64,
-    battery_temp: u16,
+    battery_temp: f64,
     charge_state: ChargeState,
     tristar_input_voltage: f64,
     tristar_charge_current: f64,
@@ -68,7 +71,7 @@ impl TristarState {
             battery_voltage: scaling.get_voltage(ram[TristarRamAddress::AdcVbFMed]),
             target_voltage: scaling.get_voltage(ram[TristarRamAddress::VbRef]),
             input_current: scaling.get_current(ram[TristarRamAddress::AdcIaFShadow]),
-            battery_temp: ram[TristarRamAddress::Tbatt],
+            battery_temp: half::f16::from_bits(ram[TristarRamAddress::Tbatt]).to_f64() * 512.,
             charge_state: ChargeState::from(ram[TristarRamAddress::ChargeState]),
             tristar_input_voltage: scaling.get_voltage(ram[TristarRamAddress::AdcVaF]),
             tristar_charge_current: scaling.get_current(ram[TristarRamAddress::AdcIbFShadow]),
@@ -115,7 +118,10 @@ impl From<u16> for ChargeState {
             7 => Self::Float,
             8 => Self::Equalize,
             9 => Self::Slave,
-            _ => Self::Unknown,
+            _ => {
+                log::info!("Unknown chargestate value: {value}");
+                Self::Unknown
+            }
         }
     }
 }
@@ -245,8 +251,9 @@ impl Tristar {
     }
 
     pub fn refresh(&mut self) {
-        if let Ok(new_state) = self
+        if let Some(new_state) = self
             .get_data()
+            .some_or_print_with("reading tristar state")
             .map(|scaling| TristarState::from_ram(scaling, &self.data_in))
         {
             BATTERY_VOLTAGE
@@ -260,7 +267,7 @@ impl Tristar {
                 .set(new_state.input_current);
             BATTERY_TEMP
                 .with_label_values(&[&self.port_name])
-                .set(new_state.battery_temp.into());
+                .set(new_state.battery_temp);
             TRISTAR_INPUT_VOLTAGE
                 .with_label_values(&[&self.port_name])
                 .set(new_state.tristar_input_voltage);