many worldgen mods and gonna try technic now

mods/technic_plus/technic/machines/HV/battery_box.lua

@@ -0,0 +1,22 @@
+-- HV battery box
+
+minetest.register_craft({
+	output = 'technic:hv_battery_box0',
+	recipe = {
+		{'technic:mv_battery_box0', 'technic:mv_battery_box0', 'technic:mv_battery_box0'},
+		{'technic:mv_battery_box0', 'technic:hv_transformer',  'technic:mv_battery_box0'},
+		{'',                        'technic:hv_cable',        ''},
+	}
+})
+
+technic.register_battery_box({
+	tier           = "HV",
+	max_charge     = 1000000,
+	charge_rate    = 100000,
+	discharge_rate = 400000,
+	charge_step    = 10000,
+	discharge_step = 40000,
+	upgrade        = 1,
+	tube           = 1,
+})
+