diff --git a/Cargo.lock b/Cargo.lock
index d5d6de6..9ca33f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -239,7 +239,7 @@ checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
 name = "charge-controller-supervisor"
-version = "1.9.9-pre-29"
+version = "1.9.9-pre-30"
 dependencies = [
  "bitflags 2.7.0",
  "chrono",
@@ -2205,7 +2205,7 @@ dependencies = [
 
 [[package]]
 name = "tesla-charge-controller"
-version = "1.9.9-pre-29"
+version = "1.9.9-pre-30"
 dependencies = [
  "chrono",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index d29ed13..824a68a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ default-members = ["charge-controller-supervisor"]
 resolver = "2"
 
 [workspace.package]
-version = "1.9.9-pre-29"
+version = "1.9.9-pre-30"
 
 [workspace.lints.clippy]
 pedantic = "warn"
diff --git a/charge-controller-supervisor/src/controller.rs b/charge-controller-supervisor/src/controller.rs
index bd28c0c..422dfb2 100644
--- a/charge-controller-supervisor/src/controller.rs
+++ b/charge-controller-supervisor/src/controller.rs
@@ -101,19 +101,19 @@ impl Controller {
         let data = self.inner.refresh().await?;
 
         if let Some(tx) = self.voltage_tx.as_mut() {
-            // if crate::config::access_config()
-            //     .await
-            //     .enable_secondary_control
-            // {
-            let target = data.common().target_voltage;
-            log::debug!(
-                "tristar {}: primary: sending target voltage {}",
-                self.name,
-                target
-            );
+            if crate::config::access_config()
+                .await
+                .enable_secondary_control
+            {
+                let target = data.common().target_voltage;
+                log::debug!(
+                    "tristar {}: primary: sending target voltage {}",
+                    self.name,
+                    target
+                );
 
-            tx.send(VoltageCommand::Set(target))?;
-            // }
+                tx.send(VoltageCommand::Set(target))?;
+            }
         }
 
         *self.data.write_state().await = Some(data);
diff --git a/charge-controller-supervisor/src/controller/tristar.rs b/charge-controller-supervisor/src/controller/tristar.rs
index a0d6ace..f957a50 100644
--- a/charge-controller-supervisor/src/controller/tristar.rs
+++ b/charge-controller-supervisor/src/controller/tristar.rs
@@ -840,9 +840,9 @@ impl Tristar {
 
     pub async fn set_target_voltage(&mut self, target_voltage: f64) -> eyre::Result<()> {
         let scaled_voltage: u16 = self.scale_voltage(target_voltage);
-        // self.modbus
-        //     .write_single_register(TristarRamAddress::VbRefSlave as u16, scaled_voltage)
-        //     .await??;
+        self.modbus
+            .write_single_register(TristarRamAddress::VbRefSlave as u16, scaled_voltage)
+            .await??;
 
         log::debug!(
             "tristar {} being set to voltage {target_voltage} (scaled: {scaled_voltage:#X?})",