solar off grid inverters
TRANSCRIPT
SOLAR OFF GRID INVERTER SYSTEM
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Solar present, Grid available. Battery Charged through Solar MPPT charger Only, Load supplied through Grid.
AC LOADS(Priority)
P1=0
AC LOADS(Others)
P2 P3
P gr=P2+P3
GRID
CHARGING
INTERLOCKDG SET(OPTIONAL)
OFF GRID SOLAR POWER SYSTEM
CONDITION # 1
P grP so
P dg
P ba = P so
©2015 STATCON ENERGIAA PVT LTDwww.statconenergiaa.com
AC LOADS(Priority)
AC LOADS(Others)
GRID
INTERLOCK
CHARGED
Solar present, Grid available. Battery Full Charged condition, Priority Load supplied only through Solar. Secondary Load Through Grid separately
CONDITION # 2
DG SET(OPTIONAL)
P1=P so
P2=P so
P3=P gr
P grP so
P dg
P ba = 0
P gr=P3
OFF GRID SOLAR POWER SYSTEM
©2015 STATCON ENERGIAA PVT LTDwww.statconenergiaa.com
AC LOADS(Priority)
AC LOADS(Others)
GRID
INTERLOCK
CHARGING
Solar NOT present, Grid Available. Battery Charged through GRID, Load supplied through Grid.
CONDITION # 3
DG SET(OPTIONAL)
P1
P2 P3
P gr=Pba +P2+P3
P grP so = 0
P dg
P ba
OFF GRID SOLAR POWER SYSTEM
©2015 STATCON ENERGIAA PVT LTDwww.statconenergiaa.com
AC LOADS(Priority)
AC LOADS(Others)
GRID
INTERLOCK
DISCHARGING
Solar NOT present, Grid NOT available. Priority Load supplied through Battery.
CONDITION # 4
DG SET(OPTIONAL)
P1=P ba
P3
P gr
P so
P dg
P ba = P2
No Interruption To LOAD during changeover!
OFF GRID SOLAR POWER SYSTEM
©2015 STATCON ENERGIAA PVT LTDwww.statconenergiaa.com
AC LOADS(Priority)
AC LOADS(Others)
GRID
INTERLOCK
CHARGING©2015 STATCON ENERGIAA PVT LTDwww.statconenergiaa.co
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CONDITION #5Solar NOT present, Grid NOT available. Battery level lower than Pre-set then Charged through DG Set, All Load supplied through DG Set.
DG SET(OPTIONAL)
P1=0
P2 P3
P dg=Pba+P2+P3
P grP so
P dg
P ba = P so
OFF GRID SOLAR POWER SYSTEM
ADVANTAGES1. Most trusted and long running technology for solar inverters2. Maintains the battery life by using solar to reduce its charging and discharging cycles compared to a non-solar inverter battery system.3. Provides uninterrupted supply to the primary loads of the household4. Can run the loads from the available sources according to the priority of the sources in the algorithm.5. Reduces diesel consumption by not running DG all the time.
DISADVANTAGES: 1. If the battery is already charged and the loads are few, then the excess power produced from the Solar panels is wasted.2. Cannot export to grid 3. No power sharing between sources. Different sources supply to different loads at the same time.4. Battery life not as good ( as Hybrid Inverters generally ) and it dies out early.
