have 2hp aircon,fridge and a 36" flat tv...

Rowel,

This is not going to be a cheap system... Are you doing this to save money or to have power where there are no utilities?

And technically, it is not "volts" that you need to research here (although, it is important), you need to understand how much power (Watts) and Energy (Watts*Hours) you need per day.

Just to give you some ideas of what you are looking at (made up numbers):

• 1,600 Watt A/C * 0.50 duty cycle * 12 hours per day = 9,600 WH per day
  
• 1.1 kWH per day refrigerator = 1,100 Watt*Hour per day
  
• 300 Watts other stuff * 12 hours per day = 3,600 WH per day
• ==============================================
• 14,300 Watt*Hours per day
  
• just FYI, Monthly power usage = 14.3 kWH per day * 30 day sper month = 429 kWH per month (probably a low estimate of power usage)

Battery bank.... With 2 days of storage and 50% maximum discharge (for longer battery life):

• 14,300 WH per day * 1/0.85 inverter eff * 1/48 volt battery bank * 2 days storage * 1/0.50 max discharge = 1,402 AH @ 48 volt battery bank (around 4,600 lbs of lead acid batteries)

You need a minimum amount of rate of charge... 5% to 13% typical for solar. For full time off grid solar and/or using Fork Lift type batteries, 10% rate of charge minimum recommended.

• 1,402 AH * 59 volts charging * 1/0.77 panel+controller deratings * 0.10 rate of charge = 10,743 Watt array nominal

And based on where you live. Say fixed array in Manilla Ph:

http://solarelectricityhandbook.com/solar-irradiance.html

Manila
Average Solar Insolation figures

Measured in kWh/m2/day onto a solar panel set at a 75° angle from vertical:
(For best year-round performance)

Jan	Feb	Mar	Apr	May	Jun
4.58	5.01	5.41	5.42	5.19	4.72
Jul	Aug	Sep	Oct	Nov	Dec
4.29	3.75	4.14	4.11	4.18	4.05

Say a minimum of 4.05 hours a day average sun (December):

• 14,300 WH per day * 1/0.52 system eff * 1/4.05 hours per day = 6,790 Watt array minimum (December break even month)

Anyway, just some quick back of the envelope numbers. You would need a minimum of 4-5 kWatt AC inverter to run your equipment (guessing). And, you should have a backup genset (probably 10-20 kWatt as backup minimum--carry you though storms and any equipment failures).

Does this help?

-Bill