Remove Null Value in Multiple Dynamic Pivot Result - sql-server

Question

I want to use dynamic multiple pivot for my table. I successfully to pivot the table but the problem is there are a lot of NULL values.
This is my current result
And this is what I have tried:
CREATE table #tempdata(
Name Varchar(100),
date date,
MeterSN Varchar(100),
Reading float,
Usage VARCHAR(20),
UsageValue float,
RecordedBy Varchar(100),
Remark Varchar(100)
)
INSERT INTO #tempdata
SELECT c.Name, a.date, b.MeterSN, a.Reading, c.Name + ' Usage' AS Usage,
Reading - LAG(reading) over(partition By currentMeterSNID order by a.date) as UsageValue,
a.RecordedBy, a.Remark
FROM INF_Facility_ElectricalRecord a
INNER JOIN INF_Facility_ElectricalMeter b ON b.id = a.currentMeterSNID
INNER JOIN INF_Facility_Location c ON c.id = b.LocationID
WHERE a.date BETWEEN '2019-03-19' AND '2019-03-20'
ORDER BY c.Name, a.date, b.MeterSN
DECLARE #cols AS NVARCHAR(MAX),
#cols2 AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
SELECT #cols = STUFF((SELECT ',' + QUOTENAME(Name)
from #tempdata
group by Name
order by Name
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
SELECT #cols2 = STUFF((SELECT ',' + QUOTENAME(Usage)
from #tempdata
group by Usage
order by Usage
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT CONVERT(VARCHAR(10),date,120) AS Date,' + #cols + ','+ #cols2 + ', recordedby AS [Recorded By] , remark AS Remark from
(
select name,date, Reading, Usage, UsageValue, remark, RecordedBy
from #tempdata
) x
pivot
(
MAX(Reading)
for Name in (' + #cols + ')
) p
pivot
(
MAX(UsageValue)
for Usage in (' + #cols2 + ')
) p
ORDER by date '
execute(#query);
drop table #tempdata
Is there any solution for my problem?