What is the most cost-effective place to buy large solar electric panels?

We don’t have enough money right now to buy capacity for the whole house, which would probably require about 12 kilowatts. However, I would like to start buying panels toward building up toward that.

But I want to buy the most solar panel for the least price. I think that piecing a lot of very small panels together will be a very expensive way to do it.

Does anyone know the least expensive way to buy large solar electric panels?

How much energy could be generated by adding solar panels to the Alaskan Pipeline?

Using low-end, i.e. cheap, solar panels, based on existing technology, how much energy can be generated by adding solar panels to the total length of the Alaskan Pipeline? And if possible, how does that compare with the energy of the oil being pumped through the pipe. Not sure what the light cycle is along the pipe.

I heared installing solar panels on my new roof to heat my pool would void my warranty is this true?

I just want to make sure I was well informed, thanks for any input. If anyone knows of other options to heat my pool with out solar panels please let me know. I should let you know that I do not have enough space nor want panels on my yard either.

How many solar panels does it take to run an A/C unit? Also, How many batteries in an array?

I was wondering how many 700 W solar panels it would take to run a household A/C unit. Also curious how many batteries it would take to keep A/C running in inhospitable environments. Would a 3500 W inverter be enough if it were to run 220 AC?