How do i get the most watts possible from this amp, with out overheating the amp.

Yes maybe, depending on what you are doing.

1) Electric Code generally says Maximum 12 boxes per electric circuit controlled by 1 circuit breaker. If you have more boxes, then your house can fail inspection IF inspector finds problem. But it is a minor problem if wire size, breaker size, and amp loads are safely matched.
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2) Reason for the code: so there is not power loss to last box when many things are drawing power from same circuit, which can cause overheating of circuit and trip breaker, and cause heat damage to some electronic devices and motors.

Which is why you are asking the question.

3) In practical terms, if you are adding outlets to run another light bulb, then you will probably not notice any problem.
However if you are adding plugs so you can run shop tools, or blower motor, or compressor etc, then that can be a problem.

For example if wire is too long, there will be power loss to motor which will cause motor overheating and shorten life of equipment.

4) Solution.
Calculate total amps and watts expected on that circuit.
Add up watts of everything running at same time.
Volts x amps = watts
120 volt microwave uses 1500 watts, how many amps?
Amps = watts divided by volts, so 1500 watts divided by 120 volts = 12.5 amps.
Compare your total expected amp usage to charts on following link.
Make sure you have correct wire and circuit breaker for expected amps. Oversizing wire and breaker are good idea.
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Your amp is overheating as your speakers all combined are 680 watts, double your max output on your amp. Ideally you need a 1000 watt amp to do the job and for perfect sound as you should never have your amp up to max as it is more likely to blow quicker. The 2000 watt amp your are speaking of will do the job perfect, but you need to keep the gain down around 50% as you could blow your speakers. But yeah all together you are right, the 2000 watt amp will stay cool as doesnt have to work nowhere near as hard as the one you have currently.

Hi
15/16 amp would be recommended.
You could to try a 20 amp, but you will risk overheating and the possible failure of the vehicle circuit fuse.
Regards

600 Watt to 1000 Watt 4 CHANNEL AMP for the four 6X9's and a less powerfull 4 Channel amp thats at least 200Watts to 400Watts peak for the 3 3-1/2 kicker speakers. Because if you try to connect the 3 3-1/2 speakers to only 1 4 channel amp that the 6X9 speakers are on you risk of overheating the amp and blowing the speakers too!!!

Assuming there is no short, or lose ground wire somewhere inside the box, diodes( in the amp) are fine, you might be overheating it by not allowing it to get good ventilation. This can be a big deal on some low end Chinese amps. Or the speakers are blown , or your Resistors (in the amp) are bad, but for arguments sake.
Most people don't use the proper size and or conductivity types of wiring, for pushing high amperage Think about it like this, Watts (power) =.Amps (energy) x Voltage (pressure) Resistance or Ohm's (amount) determines how much Wattage will go in or out, Ohms = Volts x2 / Watts.
What gauge wire are you using on your setup?

You use the same amp fuse as on your amp, nothing larger. The fuse just keeps the wire from overheating/shorting and causing a fire.. IF you amp has a 30 amp fuse then you use a 30amp fuse off the battery

I have a black and decker 100 watt power inverter. When the led turns red you are ethier overloading it or it overheated. to fix it unplug it and let it sit for 5 minutes. Plug it in. Plug in an item rated for 100 watts or less. Or try to charge somthing on the usb port.

Sounds like your speakers had too many watts sucking from an amp that couldn't produce the power to feed them.
What is the max watt power output rating for your amp?
Compare the amperage of all the speakers combined and make sure they are 15% lower that the rating on your amp. Be sure to include the sub in your totals.
Chances are you've blown the power supply on your amp.
Have you tried any of these checks yet?

200 X 4 does mean 200 watts times 4 channels. In other words each channel pushes out 200 watts. I believe u have a total output power of 800 watts but check with ur manual and if u do use that much power make sure you check for overheating, specially if its used for bass. Soundstorm amps cant take much of a beating so be careful.

Your amp is at risk of overheating and blowing if the specs are exceeded. Run bridged mode and get 2nd amp.

To get the most reliable work out of your amp, the speaker loads need to be the lowest impedance recommended. Make sure the 12v supply remains stable, good ground, larger wire (8AWG or better)will reduce voltage drop and a large cap(100,000uF) across 12v line will help with large current pulses. Keep the amp cool. No small air tight enclosures. Fans??
Tech stuff
E Squared/R=P. E(RMS speaker voltage), R(speaker impedance), P(watts). Only way to get more watts is to increase E or reduce R.