Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.
No, each size service needs its own meter base.
The current output cannot exceed what is available. 1,000 amp service to a house is rather unreasonable and most likely would not be provided by the utility anyway. 100 amp or 200 amp service would be more likely.
NOBODY!
It depends on a lot of factors. Since you will have to get an electrician involved you should start there. It is likely that you can double the capacity, but the electrician would consult with your power company to determine what is possible. I recently went from 200 A to 400 A service with a large addition; and a transformer was required in the house with rework of the two panels I already had into 5 panels.
#2 Copper with TW insulation is required for 100 amp loads #3 Copper with R90 insulation is rated at 105 amps.
About 40 panels, if the panel produces around 5a ea 5amp /200 =40. But don't expect it to be constant due to sun Ducking in and out of the clouds and cloudy and rainy days.
Yes, the wire size has to be increased. The existing 100 amp service will now probably have a #3 conductor with an insulation factor of 75 or 90 degrees C which is rated for 100 and 105 amps respectively. Increasing to a 150 amp service will use a #1/0 wire size. If you are thinking of an upgrade, skip the 150 amp service and go to a 200 amp panel. New homes are installing 200 amp 42 circuit panels. The extra cost is only reflected in the materials as the labour costs will be the same regardless whether a 150 amp or a 200 amp panel is installed. The wire size for a 200 amp panel is #3/0. With an insulation factor of 75 or 90 degrees C the rating is 200 or 210 amps respectively.
Check the nameplate on the service panel. There it will tell you what the buss capacity is. On a 200 amp service nothing in the wiring configuration is allowed to be less than that the service rating. In the market there are 200 amp 42 circuit distribution panels.
Yes, but they obviously cannot be simultaneously loaded their maximum loads because the 400-amp breaker will blow well before that. Similarly, you can have multiple 100-amp panels fed from a 200-Amp main breaker, knowing that you will NEVER have 100 amps running in all panels at the same time.
No, each size service needs its own meter base.
Depends on the size of the service. 100 amp service will require 3 gauge, 150 amp service will require 1/0 gauge, and 200 amp service will require 3/0 gauge.
Some 200 amp breaker panels are made with only 20 slots.
The current output cannot exceed what is available. 1,000 amp service to a house is rather unreasonable and most likely would not be provided by the utility anyway. 100 amp or 200 amp service would be more likely.
Yes you can as long as the sensing coils of the transfer switch are the same as the 100 amp service. The transfer switch has to be able to tell when the voltage is back from the utility side of the switch when the power is restored.
NOBODY!
It depends on a lot of factors. Since you will have to get an electrician involved you should start there. It is likely that you can double the capacity, but the electrician would consult with your power company to determine what is possible. I recently went from 200 A to 400 A service with a large addition; and a transformer was required in the house with rework of the two panels I already had into 5 panels.
#2 Copper with TW insulation is required for 100 amp loads #3 Copper with R90 insulation is rated at 105 amps.