--- a/rts/Game/WebbarBrowser.h
+++ b/rts/Game/WebbarBrowser.h
@@ -45,6 +45,7 @@
 #include "WebbarShields.h"
 #include "WebbarCloak.h"
 #include "WebbarWorkAudio.h"
+#include "WebbarEconomy.h"
 
 static bool WebbarSupports(const UnitDef* def)
 {
@@ -82,7 +83,7 @@
 	if (!catalogSent) {
 		catalogSent = true;
 		if (std::getenv("WEBBAR_NETWORK") != nullptr) { static WebbarNetworkResult result; }
-		MAIN_THREAD_EM_ASM({ if (Module['webbarProtocol']) Module['webbarProtocol'](8, 511 /* restore | shields | cloak | resurrection | native work effects | area resurrection | manual launch | capture | smart trajectory */); });
+		MAIN_THREAD_EM_ASM({ if (Module['webbarProtocol']) Module['webbarProtocol'](8, 1023 /* restore | shields | cloak | resurrection | native work effects | area resurrection | manual launch | capture | smart trajectory | energy conversion */); });
 		MAIN_THREAD_EM_ASM({
 			if (Module['webbarIdentity']) Module['webbarIdentity']($0, $1, $2, $3);
 		}, gu->myPlayerNum, gu->myTeam, gu->myAllyTeam, int(gu->spectating));
@@ -130,6 +131,7 @@
 			Module['webbarCommandDescriptions'](units, $2);
 		}, words.data(), words.size(), gs->frameNum);
 	}
+	PublishWebbarEnergyConversion();
 	const CTeam* team = teamHandler.Team(gu->myTeam);
 	const float economy[] = {team->res.metal, team->resStorage.metal, team->resPrevIncome.metal, team->resPrevExpense.metal, team->resPrevPull.metal,
 		team->res.energy, team->resStorage.energy, team->resPrevIncome.energy, team->resPrevExpense.energy, team->resPrevPull.energy};
@@ -208,6 +210,8 @@
 		std::vector<int> ids;
 		if (order.count > 64 || gu->spectating || !playerHandler.IsValidPlayer(gu->myPlayerNum)) {
 			status = 1;
+		} else if (order.kind == 1010) {
+			status = SetWebbarEnergyReserve(order.count, order.target, order.options);
 		} else if (order.kind == 1000) {
 			clientNet->Send(CBaseNetProtocol::Get().SendPause(gu->myPlayerNum, order.target != 0));
 		} else {
--- /dev/null
+++ b/rts/Game/WebbarEconomy.h
@@ -0,0 +1,50 @@
+/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
+#pragma once
+
+#include "Lua/LuaHandle.h"
+#include "Lua/LuaRulesParams.h"
+
+// Codex-assisted local interface to pinned BAR's original energy conversion
+// gadget. Read only our team; its synced gadget remains the sole state writer.
+static uint32_t ReadWebbarEnergyConversion(float (&values)[4])
+{
+	std::fill(std::begin(values), std::end(values), 0.0f);
+	if (gu->spectating || !teamHandler.IsValidTeam(gu->myTeam)) return 0;
+	const CTeam* team = teamHandler.Team(gu->myTeam);
+	const char* names[] = {"mmLevel", "mmCapacity", "mmUse", "mmAvgEffi"};
+	uint32_t mask = 0;
+	for (size_t i = 0; i < 4; ++i) {
+		const auto it = team->modParams.find(names[i]);
+		if (it == team->modParams.end() || !(it->second.los & LuaRulesParams::RULESPARAMLOS_PRIVATE_MASK)) continue;
+		const float* value = std::get_if<float>(&it->second.value);
+		if (value == nullptr || !std::isfinite(*value) || *value < 0.0f || (i == 0 && *value > 1.0f)) continue;
+		values[i] = *value;
+		mask |= 1u << i;
+	}
+	return mask;
+}
+
+static void PublishWebbarEnergyConversion()
+{
+	float values[4];
+	const uint32_t mask = ReadWebbarEnergyConversion(values);
+	if (gu->spectating || !teamHandler.IsValidTeam(gu->myTeam)) return;
+	MAIN_THREAD_EM_ASM({
+		if (Module['webbarEnergyConversion']) Module['webbarEnergyConversion']($0, $1, $2, Array.from(HEAPF32.subarray($3 >> 2, ($3 >> 2) + 4)));
+	}, gs->frameNum, gu->myTeam, mask, values);
+}
+
+static int SetWebbarEnergyReserve(uint32_t count, uint32_t percent, uint32_t options)
+{
+	// Match gui_top_bar's ordinary slider limits, not the gadget's wider API.
+	if (count != 0 || options != 0 || percent < 12 || percent > 88) return 6;
+	float values[4];
+	if (!(ReadWebbarEnergyConversion(values) & 1u)) return 8;
+	const std::string level = std::to_string(percent);
+	std::vector<uint8_t> message = {137};
+	message.insert(message.end(), level.begin(), level.end());
+	// Same network path as Spring.SendLuaRulesMsg. The original RecvLuaMsg
+	// resolves the sender's team and rejects spectators; no team selector exists.
+	clientNet->Send(CBaseNetProtocol::Get().SendLuaMsg(gu->myPlayerNum, LUA_HANDLE_ORDER_RULES, 0, message));
+	return 0;
+}