12 volt Use Calculations

To use 50 watts x 24hr [4a draw continuous] at 80% effieciency with 6 hous of sun 
Minimum System Size:            200.00 Watts
Recommended System Size:        250.00 Watts
Recommended Battery Size (12V): 200 Amp-hours  [LI  50 Amp-hours]


To use 100 watts x 24hr [7.8a draw continuous] at 80% effieciency with 6 hous of sun 
Minimum System Size: 400.00 Watts
Recommended System Size: 500.00 Watts
Recommended Battery Size (12V): 400 Amp-hours  [LI 100 Amp-hours]

To use 150 watts x 24hr [11.63a draw continuous] at 80% effieciency with 6 hous of sun 
Minimum System Size:600.00 Watts
Recommended System Size:750.00 Watts
Recommended Battery Size (12V):600 Amp-hours  [LI 150 Amp-hours]

To use 200 watts x 24hr [15.5a draw continuous] at 80% effieciency with 6 hous of sun 
Minimum System Size:800.00Watts
Recommended System Size:1000.00Watts
Recommended Battery Size (12V):800 Amp-hours  [LI 200 Amp-hours]

To use 250 watts x 24hr [19.38a draw continuous] at 80% effieciency with 6 hous of sun 
Minimum System Size:1000.00 Watts 
Recommended System Size:1250.00 Watts
Recommended Battery Size (12V): 1000 Amp-hours  [LI 250 Amp-hours]


https://www.renogy.com/calculators 
Charge Controller efficiency (PWM: 80%, MPPT: 92%)