A solar generator is a power station sold together with panels, and the bundle is only a good deal if the parts genuinely match. What is in the box, and whether the panels can actually feed the station at full rate, matter more than the headline wattage.
Bundles vary a lot: the same station may be sold with one panel or four, with or without cables and adapters. Compare the total panel wattage and the panel count rather than the bundle name, because two kits with the same product family in the title can differ by hundreds of watts of solar.
Solar panels are rated under standard test conditions: full perpendicular sun, cool cell temperature. Real-world output is meaningfully lower, and falls further with haze, heat, dirt and any angle away from the sun. Plan on a working figure well below the rating, and treat a bundle that promises a fast recharge from solar as an optimistic best case.
Each station has a maximum solar input in watts, plus a voltage and current window its charge controller accepts. Panels beyond that ceiling are wasted, and panels outside the voltage window may not charge at all. A matched bundle should already respect this, which is the main argument for buying one instead of assembling parts.
Bundles remove the compatibility question and are usually discounted against buying the pieces individually. Buying separately makes sense when you want more panel capacity than any bundle offers, or panels from a different maker, in which case connector and voltage compatibility become your problem to verify.
If the goal is riding out grid outages rather than living off-grid, work out how quickly you need to recharge before paying for panel capacity you will rarely be able to use.
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None, in the hardware: a solar generator is a portable power station bundled with solar panels, and the term describes the package rather than a different kind of device. Any station with a solar input can be turned into one by adding compatible panels later.
Divide the battery capacity in watt-hours by the realistic solar input in watts, then add a substantial margin, since panels rarely produce their rated output outside ideal conditions, and the usable solar window is only a few hours around midday. A bundle quoting a very fast solar recharge is quoting perfect conditions.
Only up to the station's maximum solar input, and within the voltage and current window its charge controller accepts. Exceeding the wattage ceiling wastes the extra panels; going outside the voltage range can stop charging entirely. Check both figures in the station's specifications before buying additional panels.