Is possible to safely series connect 2x200w=400w (@90voc) into a 150v 40a scc to 2 parallel connected 12v 170a batteries and 2200w 12v inverter?

Yes, of course. When you hook up 2 panels in series, the VOC is about 90V, your controller is 150v 40a, that is no problem. It will be a perfect solar system.

Is it better to have 1 200 w or 2 100w panels?

It depends on a few factors. Is your charge controller an mppt type . Mppt loves extra voltage. As long as it can handle it. . Will your panels be behind a window or shaded or will they have full sun all day. If I have a 24v panel that outputs 5 amps and a 12v battery my mppt gives my battery 12amps. If I use instead a panel that uses 24v and 10a the amperage to the battery is 20a which is my charge controllers limit. I can do tests before I buy because I have a lab bench power supply btw. If say you have two 100w panels hooked up in parallel each putting out 5a it would be 10 amps total coming from the panel portion and you'll get a little over 10 amps going to the battery. And if you do the two 100 watt panels in series you'll get Bout 34v total going to the charge controller and 5a . But because it's a high voltage you'll be getting more amps going to the battery. My power supply is limited to the 31v but at the 31v and 5a houng to the charge controller.. the battery is getting 11 amps so if I could go higher it might be like 15a instead going to the battery. Higher voltage inputs is better so either do a single 24 high voltage panel or a couple of 12v in series 5a output panel is good. More is better lol. Also with higher voltage wires can be thinner and still be safe because they the wont heat up as much. Nothing wrong with buying what you can afford if you can onky afford a single 12v 5a pannel then get that and get another one later. If you can afford a single 200watt panel then do that. There is just alot of factors at play . If you have pwm solar charge controller then you cant do the 24 v panels I believe and must actually still to 12v also if the pwm is what you are using you are waiting lots of power. Best of luck!

Brand	RICH SOLAR
Material	Aluminum, Monocrystalline Silicon, Tempered Glass
Product Dimensions	58.7"L x 26.8"W x 1.4"H
Item Weight	26.5 Pounds
Efficiency	High Efficiency
Included Components	1 x 200W 24V Monocrystalline Solar Panel
AC Adapter Current	5.32 Amps
Maximum Voltage	37.6 Volts (DC)
Upper Temperature Rating	185 Degrees Fahrenheit
Maximum Power	200 Watts
Special Feature	[POSSIBLE] High efficiency or power output
UPC	782901719723
Manufacturer	RICH SOLAR
Part Number	RS-M200D
Item Weight	26.5 pounds
Item model number	RS-M200D
Size	200W 24V Single Panel
Power Source	Battery Powered
Wattage	200 watts
Special Features	[POSSIBLE] High efficiency or power output
Usage	High Efficiency Solar Module for RV Trailer Camper Marine Off Grid
Batteries Included?	No
Batteries Required?	No

RICH SOLAR 200 Watt 24 Volt Moncrystalline Solar Panel High Efficiency Solar Module for RV Trailer Camper Marine Off Grid

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