If you were hoping of powering things directly off of the solar panels, well it is better to think of the solar panel as a battery charger and the batteries as being the power source.
Portable fridge I hope means it is a 12volt, perhaps AC/DC chest style fridge??
For seeing how much battery and solar you need to refill that battery.
Expect one of these to consume about 1 AH per hour under 80F. Best case scenario is a little less than half this.
Expect a laptop to consume 3 to 4 AH per hour, but upto 7 to 8 amps at times if a powerful laptop editing videos.
Recharging the cell phone from dead consumes about 0.5 AH of battery capacity.
Not sure about the printer's consumption. A printer 'might' require a Pure sine wave inverter as opposed to a modified sine wave inverter which are less expensive
If you look on the power bricks provided with laptop and printer, there will be an output voltage and amperage and possibly wattage ratings
These are the maximum levels of electricity these devices can demand, not necessarily the amount they will demand at all times.
See if your laptop has a Car Adapter power supply. These are much more efficient than having an inverter power the provided power brick.
The printer will likely have some DC voltage input as well from a provided power supply, and technically a DC to DC adapter can be found and then it need not require an inverter.
A hundred watts of solar should not feed more than 100 amp hours of battery capacity, ideally, if solar is to be the only recharging source. Ultimately, battery longevity will suffer to some degree if too little solar regularly has to feed too much battery, each and every day.
You've got to add up all the expected loads consumption and then have enough solar wattage to replace what was used, and another 10% or so to account for inefficiencies
Expect 130 watts of solar to return about 62 AH in summer on a good sunny day.
You do not want to take more than 50AH from a 100AH capacity battery
If one gets to use grid power to power a regular battery charger every so often, then the battery's will have extended longevity and the solar/capacity ratio can be lower.
If one utilizes the alternator and a thick copper path from alternator to house battery, then relatively short drives can bring a depleted battery to 80% state of charge fairly quickly, but that last 20% takes no less than 4 hours no matter what charging source is used.
I happen to run a laptop several hours a day, A TV for a few hours, a 1.8 cubic foot front loading fridge, several fans running each and every day off of 198 watts of solar, and I have 130 AH of battery exclusively to power these things. It is more than enough Solar in summer, but not quite enough in winter.
As other said, you got to forget about the heating electrically. At the most, a 50 watt heating pad set on low should be the most you can expect from a single large 12v lead acid battery to keep you warm overnight.
More solar will always be better, if you have more than needed, the battery is just that much happier and lasts that much longer, and you have a bigger buffer for cloudy days.
For maximum battery longevity any charging source available should be used whenever possible to return the battery(s) to as high a rate of charge, as this is where lead acid batteries would choose to live their whole life if it was up to them. 100% charged all the time.
But they are just batteries and are rented. Poorly treated batteries 'might' last 200 cycles. well treated 500 cycles, and if a true deep cycle battery like golf cart batteries, well treated, expect 1000 or more cycles
