diff --git a/README.md b/README.md
index 759eefa7ee..522103bd85 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,6 @@ The `PowerSystems.jl` package provides a rigorous data model using Julia structu
 ## Version Advisory
 
 - PowerSystems will work with Julia v1.6+.
-- If you are planning to use `PowerSystems.jl` in your package, check the [roadmap to version 4.0](https://github.com/NREL-Sienna/PowerSystems.jl/projects/4) for upcoming changes
 
 ## Device data enabled in PowerSystems
 
diff --git a/src/base.jl b/src/base.jl
index c0b07f77da..335f34a1ea 100644
--- a/src/base.jl
+++ b/src/base.jl
@@ -10,7 +10,7 @@ const SYSTEM_KWARGS = Set((
     :generator_mapping,
     :internal,
     :load_name_formatter,
-    :load_zone_formatter,
+    :loadzone_name_formatter,
     :runchecks,
     :shunt_name_formatter,
     :time_series_directory,
@@ -2449,6 +2449,7 @@ function convert_component!(
         (from_to = line.rating, to_from = line.rating),
         line.rating,
         line.angle_limits,
+        line.g,
         line.services,
         line.ext,
         _copy_internal_for_conversion(line),
@@ -2492,6 +2493,7 @@ function convert_component!(
         line.b,
         line.rating,
         line.angle_limits,
+        line.g,
         line.services,
         line.ext,
         _copy_internal_for_conversion(line),
diff --git a/src/descriptors/power_system_structs.json b/src/descriptors/power_system_structs.json
index b96ba69642..3b17602928 100644
--- a/src/descriptors/power_system_structs.json
+++ b/src/descriptors/power_system_structs.json
@@ -480,6 +480,18 @@
                     },
                     "validation_action": "error"
                 },
+                {
+                    "name": "g",
+                    "null_value": "(from=0.0, to=0.0)",
+                    "data_type": "FromTo",
+                    "comment": "Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value",
+                    "valid_range": {
+                        "min": 0,
+                        "max": 100
+                    },
+                    "validation_action": "warn",
+                    "default": "(from=0.0, to=0.0)"
+                },
                 {
                     "name": "services",
                     "data_type": "Vector{Service}",
@@ -599,6 +611,18 @@
                     },
                     "validation_action": "error"
                 },
+                {
+                    "name": "g",
+                    "null_value": "(from=0.0, to=0.0)",
+                    "data_type": "FromTo",
+                    "comment": "Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value",
+                    "valid_range": {
+                        "min": 0,
+                        "max": 100
+                    },
+                    "validation_action": "warn",
+                    "default": "(from=0.0, to=0.0)"
+                },
                 {
                     "name": "services",
                     "data_type": "Vector{Service}",
diff --git a/src/models/generated/Line.jl b/src/models/generated/Line.jl
index 2a638e096d..ffd7d58319 100644
--- a/src/models/generated/Line.jl
+++ b/src/models/generated/Line.jl
@@ -16,6 +16,7 @@ This file is auto-generated. Do not edit.
         b::FromTo
         rating::Float64
         angle_limits::MinMax
+        g::FromTo
         services::Vector{Service}
         ext::Dict{String, Any}
         internal::InfrastructureSystemsInternal
@@ -34,6 +35,7 @@ An AC transmission line
 - `b::FromTo`: Shunt susceptance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value, validation range: `(0, 100)`
 - `rating::Float64`: Thermal rating (MVA). Flow on the line must be between -`rating` and `rating`. When defining a line before it is attached to a `System`, `rating` must be in per-unit divided by the base power of the `System` it will be attached to
 - `angle_limits::MinMax`: Minimum and maximum angle limits (radians), validation range: `(-1.571, 1.571)`
+- `g::FromTo`: (default: `(from=0.0, to=0.0)`) Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value, validation range: `(0, 100)`
 - `services::Vector{Service}`: (default: `Device[]`) Services that this device contributes to
 - `ext::Dict{String, Any}`: (default: `Dict{String, Any}()`) An [*ext*ra dictionary](@ref additional_fields) for users to add metadata that are not used in simulation, such as latitude and longitude.
 - `internal::InfrastructureSystemsInternal`: (**Do not modify.**) PowerSystems.jl internal reference
@@ -59,6 +61,8 @@ mutable struct Line <: ACBranch
     rating::Float64
     "Minimum and maximum angle limits (radians)"
     angle_limits::MinMax
+    "Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value"
+    g::FromTo
     "Services that this device contributes to"
     services::Vector{Service}
     "An [*ext*ra dictionary](@ref additional_fields) for users to add metadata that are not used in simulation, such as latitude and longitude."
@@ -67,12 +71,12 @@ mutable struct Line <: ACBranch
     internal::InfrastructureSystemsInternal
 end
 
-function Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, services=Device[], ext=Dict{String, Any}(), )
-    Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, services, ext, InfrastructureSystemsInternal(), )
+function Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, g=(from=0.0, to=0.0), services=Device[], ext=Dict{String, Any}(), )
+    Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, g, services, ext, InfrastructureSystemsInternal(), )
 end
 
-function Line(; name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, services=Device[], ext=Dict{String, Any}(), internal=InfrastructureSystemsInternal(), )
-    Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, services, ext, internal, )
+function Line(; name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, g=(from=0.0, to=0.0), services=Device[], ext=Dict{String, Any}(), internal=InfrastructureSystemsInternal(), )
+    Line(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, rating, angle_limits, g, services, ext, internal, )
 end
 
 # Constructor for demo purposes; non-functional.
@@ -88,6 +92,7 @@ function Line(::Nothing)
         b=(from=0.0, to=0.0),
         rating=0.0,
         angle_limits=(min=-1.571, max=1.571),
+        g=(from=0.0, to=0.0),
         services=Device[],
         ext=Dict{String, Any}(),
     )
@@ -113,6 +118,8 @@ get_b(value::Line) = value.b
 get_rating(value::Line) = get_value(value, value.rating)
 """Get [`Line`](@ref) `angle_limits`."""
 get_angle_limits(value::Line) = value.angle_limits
+"""Get [`Line`](@ref) `g`."""
+get_g(value::Line) = value.g
 """Get [`Line`](@ref) `services`."""
 get_services(value::Line) = value.services
 """Get [`Line`](@ref) `ext`."""
@@ -138,6 +145,8 @@ set_b!(value::Line, val) = value.b = val
 set_rating!(value::Line, val) = value.rating = set_value(value, val)
 """Set [`Line`](@ref) `angle_limits`."""
 set_angle_limits!(value::Line, val) = value.angle_limits = val
+"""Set [`Line`](@ref) `g`."""
+set_g!(value::Line, val) = value.g = val
 """Set [`Line`](@ref) `services`."""
 set_services!(value::Line, val) = value.services = val
 """Set [`Line`](@ref) `ext`."""
diff --git a/src/models/generated/MonitoredLine.jl b/src/models/generated/MonitoredLine.jl
index 3ba2d6e195..4ae1230109 100644
--- a/src/models/generated/MonitoredLine.jl
+++ b/src/models/generated/MonitoredLine.jl
@@ -17,6 +17,7 @@ This file is auto-generated. Do not edit.
         flow_limits::FromTo_ToFrom
         rating::Float64
         angle_limits::MinMax
+        g::FromTo
         services::Vector{Service}
         ext::Dict{String, Any}
         internal::InfrastructureSystemsInternal
@@ -38,6 +39,7 @@ For example, monitored lines can be used to restrict line flow following a conti
 - `flow_limits::FromTo_ToFrom`: Minimum and maximum permissable flow on the line (MVA), if different from the thermal rating defined in `rating`
 - `rating::Float64`: Thermal rating (MVA). Flow through the transformer must be between -`rating` and `rating`. When defining a line before it is attached to a `System`, `rating` must be in per-unit divided by the base power of the `System` it will be attached to
 - `angle_limits::MinMax`: Minimum and maximum angle limits (radians), validation range: `(-1.571, 1.571)`
+- `g::FromTo`: (default: `(from=0.0, to=0.0)`) Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value, validation range: `(0, 100)`
 - `services::Vector{Service}`: (default: `Device[]`) Services that this device contributes to
 - `ext::Dict{String, Any}`: (default: `Dict{String, Any}()`) An [*ext*ra dictionary](@ref additional_fields) for users to add metadata that are not used in simulation, such as latitude and longitude.
 - `internal::InfrastructureSystemsInternal`: (**Do not modify.**) PowerSystems.jl internal reference
@@ -65,6 +67,8 @@ mutable struct MonitoredLine <: ACBranch
     rating::Float64
     "Minimum and maximum angle limits (radians)"
     angle_limits::MinMax
+    "Shunt conductance in pu ([`SYSTEM_BASE`](@ref per_unit)), specified both on the `from` and `to` ends of the line. These are commonly modeled with the same value"
+    g::FromTo
     "Services that this device contributes to"
     services::Vector{Service}
     "An [*ext*ra dictionary](@ref additional_fields) for users to add metadata that are not used in simulation, such as latitude and longitude."
@@ -73,12 +77,12 @@ mutable struct MonitoredLine <: ACBranch
     internal::InfrastructureSystemsInternal
 end
 
-function MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, services=Device[], ext=Dict{String, Any}(), )
-    MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, services, ext, InfrastructureSystemsInternal(), )
+function MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, g=(from=0.0, to=0.0), services=Device[], ext=Dict{String, Any}(), )
+    MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, g, services, ext, InfrastructureSystemsInternal(), )
 end
 
-function MonitoredLine(; name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, services=Device[], ext=Dict{String, Any}(), internal=InfrastructureSystemsInternal(), )
-    MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, services, ext, internal, )
+function MonitoredLine(; name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, g=(from=0.0, to=0.0), services=Device[], ext=Dict{String, Any}(), internal=InfrastructureSystemsInternal(), )
+    MonitoredLine(name, available, active_power_flow, reactive_power_flow, arc, r, x, b, flow_limits, rating, angle_limits, g, services, ext, internal, )
 end
 
 # Constructor for demo purposes; non-functional.
@@ -95,6 +99,7 @@ function MonitoredLine(::Nothing)
         flow_limits=(from_to=0.0, to_from=0.0),
         rating=0.0,
         angle_limits=(min=-1.571, max=1.571),
+        g=(from=0.0, to=0.0),
         services=Device[],
         ext=Dict{String, Any}(),
     )
@@ -122,6 +127,8 @@ get_flow_limits(value::MonitoredLine) = get_value(value, value.flow_limits)
 get_rating(value::MonitoredLine) = get_value(value, value.rating)
 """Get [`MonitoredLine`](@ref) `angle_limits`."""
 get_angle_limits(value::MonitoredLine) = value.angle_limits
+"""Get [`MonitoredLine`](@ref) `g`."""
+get_g(value::MonitoredLine) = value.g
 """Get [`MonitoredLine`](@ref) `services`."""
 get_services(value::MonitoredLine) = value.services
 """Get [`MonitoredLine`](@ref) `ext`."""
@@ -149,6 +156,8 @@ set_flow_limits!(value::MonitoredLine, val) = value.flow_limits = set_value(valu
 set_rating!(value::MonitoredLine, val) = value.rating = set_value(value, val)
 """Set [`MonitoredLine`](@ref) `angle_limits`."""
 set_angle_limits!(value::MonitoredLine, val) = value.angle_limits = val
+"""Set [`MonitoredLine`](@ref) `g`."""
+set_g!(value::MonitoredLine, val) = value.g = val
 """Set [`MonitoredLine`](@ref) `services`."""
 set_services!(value::MonitoredLine, val) = value.services = val
 """Set [`MonitoredLine`](@ref) `ext`."""
diff --git a/src/models/generated/includes.jl b/src/models/generated/includes.jl
index 1d50632cab..9f4dbbf26a 100644
--- a/src/models/generated/includes.jl
+++ b/src/models/generated/includes.jl
@@ -528,6 +528,7 @@ export get_from_branch_control
 export get_fs
 export get_fuel
 export get_fuel_flag
+export get_g
 export get_gate_openings
 export get_gate_position_limits
 export get_hysteresis_binary_logic
@@ -1093,6 +1094,7 @@ export set_from_branch_control!
 export set_fs!
 export set_fuel!
 export set_fuel_flag!
+export set_g!
 export set_gate_openings!
 export set_gate_position_limits!
 export set_hysteresis_binary_logic!
diff --git a/src/parsers/pm_io/data.jl b/src/parsers/pm_io/data.jl
index d35bd6e497..ff7ce19ee4 100644
--- a/src/parsers/pm_io/data.jl
+++ b/src/parsers/pm_io/data.jl
@@ -1695,10 +1695,7 @@ function correct_bus_types!(data::Dict{String, <:Any})
             end
 
             if bus_gens_count != 0 && bus["bus_type"] != 2
-                @info "active generators found at bus $(bus["bus_i"]), updating to bus type from $(bus["bus_type"]) to 2" maxlog =
-                    PS_MAX_LOG
-                bus["bus_type"] = 2
-                push!(modified, bus["index"])
+                @warn "active generators found at bus $(bus["bus_i"]) on bus type $(bus["bus_type"]), i.e. different than 2 (PV). Consider checking your data inputs."
             end
         end
     end
diff --git a/src/parsers/power_models_data.jl b/src/parsers/power_models_data.jl
index 4880060867..0973f3338e 100644
--- a/src/parsers/power_models_data.jl
+++ b/src/parsers/power_models_data.jl
@@ -326,7 +326,6 @@ function read_loadzones!(
     kwargs...,
 )
     @info "Reading LoadZones data in PowerModels dict to populate System ..."
-    _get_name = get(kwargs, :loadzone_name_formatter, _get_pm_dict_name)
     zones = Set{Int}()
     zone_bus_map = Dict{Int, Vector}()
     for (_, bus) in data["bus"]
@@ -346,9 +345,15 @@ function read_loadzones!(
         load_zone_map[zone]["pd"] += get(load, "py", 0.0)
         load_zone_map[zone]["qd"] += get(load, "qy", 0.0)
     end
+
+    default_loadzone_naming = string
+    # The formatter for loadzone_name should be a function that transform the LoadZone Int to a String
+    _get_name = get(kwargs, :loadzone_name_formatter, default_loadzone_naming)
+
     for zone in zones
+        name = _get_name(zone)
         load_zone = make_loadzone(
-            string(zone),
+            name,
             load_zone_map[zone]["pd"],
             load_zone_map[zone]["qd"];
             kwargs...,
diff --git a/src/utils/IO/system_checks.jl b/src/utils/IO/system_checks.jl
index c5474499c1..24bfab8704 100644
--- a/src/utils/IO/system_checks.jl
+++ b/src/utils/IO/system_checks.jl
@@ -123,7 +123,7 @@ Sum of system generator and storage ratings.
 function total_capacity_rating(sys::System)
     total = 0
     for component_type in (Generator, Storage)
-        components = get_components(Generator, sys)
+        components = get_components(component_type, sys)
         if !isempty(components)
             component_total = sum(get_rating.(components)) * get_base_power(sys)
             @debug "total rating for $component_type = $component_total" _group =
diff --git a/src/utils/print.jl b/src/utils/print.jl
index ec78adcd70..10de3766b6 100644
--- a/src/utils/print.jl
+++ b/src/utils/print.jl
@@ -298,3 +298,10 @@ show_components(
     additional_columns::Union{Dict, Vector} = Dict();
     kwargs...,
 ) = show_components(io, sys, component_type, additional_columns; kwargs...)
+
+"""
+Show a table with the summary of time series attached to the system.
+"""
+function show_time_series(sys::System)
+    IS.show_time_series_data(stdout, sys.data)
+end
diff --git a/test/test_parse_psse.jl b/test/test_parse_psse.jl
index ba1c639f89..e31f34bc7b 100644
--- a/test/test_parse_psse.jl
+++ b/test/test_parse_psse.jl
@@ -36,4 +36,15 @@ end
     @test get_available(get_component(ThermalStandard, sys, "generator-2438-ND")) == 0
     @test get_status(get_component(ThermalStandard, sys, "generator-2438-EG")) == 1
     @test get_available(get_component(ThermalStandard, sys, "generator-2438-EG")) == 1
+
+    @info "Testing Load Zone Formatter"
+    PSB.clear_serialized_systems("psse_Benchmark_4ger_33_2015_sys")
+    sys3 = build_system(
+        PSYTestSystems,
+        "psse_Benchmark_4ger_33_2015_sys";
+        loadzone_name_formatter = x -> string(3 * x),
+    )
+    lz_original = only(get_components(LoadZone, sys2))
+    lz_new = only(get_components(LoadZone, sys3))
+    @test parse(Int, get_name(lz_new)) == 3 * parse(Int, get_name(lz_original))
 end