Copy data from SQL to postgres Fast Load

I am trying to speed up the copy of the data from SQL to Postgres in SSIS.
I have read the developer manual and tried to implement the Fast Load feature.
My connection string appears to work (Data Source=edpl;User ID=postgres;Initial Catalog=prod_stuff;Provider=SQLOLEDBPGNP.1;Persist Security Info=True;OPTIMIZER=ON;)
and everything seems to work until I change the SSIS data access mode to "Table or View - Fast Load" in the OLD DB Destination editor.
I end up getting error: -
:Error: invalid byte sequence for encoding "UTF8": 0x00

If I am using a provider of SQLOLEDBPGNP.1 in the connection string would this not indicate that I am using the newer version or is that not a given?

CREATE TABLE [BSGDelta].[OccupantTypeDelta](
[PropertyID] [int] NOT NULL,
[VariableSegmentID] [int] NULL,
[DeltaActionType] [nvarchar](1) NOT NULL,
CONSTRAINT [PK_OccupantTypeDelta_1] PRIMARY KEY CLUSTERED
(
[PropertyID] ASC,
[DeltaActionType] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO
PropertyID VariableSegmentID DeltaActionType
1000014 1 U
1000015 1 U
1000016 1 U
1000017 1 U
1000021 1 U
1000022 1 U
1000023 1 U
1000024 2 U
1000025 2 U
1000026 2 U

In Postgres

CREATE TABLE mssql.occupant_type_delta
(
property_id integer,
variable_segment_id integer,
deltaactiontype character varying(2)
)
WITH (
OIDS=FALSE
);
ALTER TABLE mssql.occupant_type_delta
OWNER TO postgres;

Any feedback?