Oh please, its just photovoltaics and electricity. Its not like stellar cartography and quantum physics or anything like that.
I could go through all the math and give you an example PV array size, but whats really killing you here is that it will only be used once a month for two hours!
But, here it goes...
An electric motor powered pump that can perform this task might take as much as 10 amps at 120 vac, or put simply - 10 X 120 = 12000 watts
12000 X 2 hrs. = 24000 watts
I am not sure what the total number of hours of equivalent full rated power for a PV module would be in Belize, but it should be a lot, being so close to the equator and all. So I am going to guess at 7 hours.
The power would come from a battery bank...
24000 / 48 = 500
500 X 2 = 1000 amp hours capacity @ 48volts
I doubled it so that the battery would discharge by 50%
This helps to keep the voltage higher under load as well.
So, to recharge that battery bank over the coarse of the month...
30 days X 7Hrs. / 66% = *138 hours equivalent full rated power per month.
(* this number will vary from month to month depending on weather conditions)
24000 / 138 = a 200 watt PV array at 48 volts nominal. $1,000.00 not installed.
But the battery bank could cost $11,400.00 not installed.
http://www.solaronebatteries.com/Keep in mind that these are just rough figures. Your looking at spending about $20,000.00 with inverter(s) and installation and shipping and all.
Yikes! Somebody, prove me wrong, please! Thats to much.