Solar Generator vs DIY Solar: Why an All-in-One Setup Just Works
Building out a solar system doesn't have to be complicated. If you've been looking into it and you're already drowning in charge controllers, MPPT versus PWM, inverters, SAE adapters, and battery chemistries, I get it. It might as well be its own language.
But there's a shortcut, and it's the one I've been using for years: a solar generator. It's an all-in-one, plug-and-play solution that handles most of the hard parts for you. In this post I'll go through how these things actually work, what to look for before you buy one, and where a DIY solar setup still wins.
Some links below are affiliate links. If you buy through them I get a small commission at no extra cost to you, and it helps me keep making videos. The solar generator in this post was not sponsored. I bought it.
What is a solar generator, and how does it work?
A solar generator, sometimes called a power station, is a battery, an inverter, and a charge controller packed into one box. Instead of wiring those components together yourself, you plug solar panels into one side and your gear into the other.
The one I use is the EcoFlow Delta 2 Max. I'll say right up front that you don't need this exact unit. There are a lot of good brands out there now, Bluetti, Jackery, Anker, and plenty more. I happen to like EcoFlow because of the interface and because it's been reliable for me over the years, but this isn't a "buy this specific thing" post.
Battery chemistry is the spec that actually matters
If you take one thing away from this, make it this: check the battery chemistry before you buy. It varies from brand to brand and it's the difference between a unit that lasts and a unit that doesn't.
You want lithium iron phosphate, usually written LiFePO4. It costs a bit more and I believe it's a little heavier, but it lasts significantly longer. We're talking thousands of cycles before it drops to around 80% capacity, and it's still usable after that. It just won't be quite what it was new.
The Delta 2 Max was one of the first solar generators to use LiFePO4. Not the first, one of the first. That's specifically why I bought it.
The inverter, and what those wattage numbers mean
Most of these units have a built-in inverter. The higher the wattage, the more demanding the appliances you can run.
Mine is a 2400W inverter with a 4800W surge, which is a lot of headroom. What the inverter is doing is taking the DC power from the 12V lithium battery inside and converting it to AC, the same kind of power that comes out of the outlets at home. There are six AC ports on the back, so everyday stuff like camera gear and laptops is easy. I've used it to make smoothies on top of a mountain.
There's also a 12V port for 12V appliances. I run a compressor fridge in the back of my Jeep off it, and because that fridge draws so little, I could keep it going for days.
For most people, somewhere around 2,000 watt-hours of capacity is a good place to land.
Specs at a glance
Spec | EcoFlow Delta 2 Max |
Battery chemistry | LiFePO4 (lithium iron phosphate) |
Inverter | 2,400W continuous / 4,800W surge |
AC outlets | 6 |
DC | 12V port for 12V appliances |
Solar input | 2x XT60, up to 800W rated |
Real-world solar input I've seen | Around 700W using two 400W panels |
Weight | Roughly 55 to 60 lbs |
How solar actually connects to it
This is where the all-in-one part really pays off. These units usually have the charge controller or MPPT device built in, so the messy job of regulating solar power into your battery is already handled.
On the Delta 2 Max there are two XT60 ports on the back, rated for up to 800W of solar panels. I haven't hit that ceiling. Running two 400W panels into both ports, the highest I've actually seen is around 700W. Other units use different ports, and you can get adapters either way.
Once it's plugged in, that's genuinely it.
The one thing that does get complicated: series vs parallel
If you mix different panels, or wire them in series and parallel, you have to pay attention to voltage and amperage. Every unit has limits on how much wattage, voltage, and current it can take in.
The short version:
Series (panels connected directly to each other): the volts add up, amps stay the same
Parallel (panels not directly connected): the amps add up, volts stay the same
Pair a unit like this with two 400W solar briefcases and you're in good shape. A lot of these brands also sell gas generators if you want a backup layer that isn't solar.
Where all-in-one units really shine: the interface
The user interface is underrated. EcoFlow's shows exactly how much solar is coming in and how much power is going out, which is how you find out your panels are angled wrong, or that something in your system isn't working at all.
Plug a device in and it estimates how long the battery will last at that draw. That's the kind of thing you can absolutely build into a DIY system, but you have to build it.
Pros of an all-in-one solar generator
Easy setup. It works out of the box. Nothing to wire.
Everything's included: DC output, AC inverter, solar charge controller, overload protection, cooling fans, and phone-based monitoring.
You can charge it on the grid. This one's bigger than it sounds. If you're at a hotel for a night, you plug it in and top it off. With a lithium battery buried in a DIY system, you're not pulling wiring apart to do that.
Portable. You can take it out of the rig and use it somewhere else.
Cons of an all-in-one solar generator
Single point of failure. Everything lives in one box. If something goes wrong you're shipping the whole unit back to the manufacturer, and if you're out of warranty, it may just be done.
Heavy. Probably lighter than all the separate components would be, but this thing is still around 55 or 60 lbs. Not something you casually move around.
Pricey. Though I still think it comes in cheaper than a DIY array with good components. If you buy the cheapest possible parts, DIY might win on price.
Not customizable. Want more solar input, a bigger inverter, more battery? You can add expansion batteries, but otherwise you're upgrading the whole device instead of swapping one component.
Efficiency loss in an RV. This one hits me specifically. I haven't found a way to use it in my trailer other than treating it like shore power, meaning I run it into the trailer through the AC outlets. That converts AC to DC and back to AC again, and you lose real efficiency in those conversions. Running 12V DC solar straight to a trailer battery is cleaner. It's one of the main reasons I'm currently building a DIY solar system in my RV.
Solar generator vs DIY solar: which should you buy?
Solar generator | DIY solar system | |
Setup time | Out of the box | Weeks of research, or pay someone |
Customization | Limited | Full control over every component |
Repairability | Whole unit goes back | Replace one part |
Portability | Pick it up and go | Stays in the rig |
Efficiency in an RV | Loses some in conversion | Direct 12V DC, more efficient |
Grid charging | Plug it into a wall | Awkward |
If you're a beginner, or you don't want to spend months learning solar, or you just need something reliable that works when you need it, the all-in-one is the right call. That's not a compromise pick.
If you're running a permanent RV install and efficiency matters to you, DIY is worth the effort. And honestly these two work well together. I'm building a DIY system in the trailer and still keeping the portable unit, because being able to pick it up and carry it somewhere is its own feature.
FAQ
Is a solar generator worth it for RV living?
Yes, especially as a starting point or as a portable second system. The catch is that feeding a trailer through the AC outlets loses efficiency compared to direct 12V DC solar going to your house battery.
How many watt-hours do I need?
For most people running electronics, a fridge, and normal camp gear, around 2,000 watt-hours is a good target.
What does LiFePO4 mean and why does it matter?
Lithium iron phosphate. It costs a bit more and weighs a bit more, but it lasts thousands of cycles before dropping to roughly 80% capacity, versus far fewer for other lithium chemistries. It's the spec I'd check first.
Can I use any solar panel with a solar generator?
Mostly, with the right adapter, but you have to stay inside the unit's voltage and amperage limits. Mixing panel types or combining series and parallel wiring is where you need to run the numbers.
Is a solar generator cheaper than building my own solar system?
Compared to a DIY build using good components, usually yes. Compared to a budget DIY build using the cheapest parts, no.
Final thoughts
If you want the easy version of solar, this is it. One box, no wiring, and it works when you need it to. The tradeoffs are real, the weight, the price, the efficiency hit in a trailer, but for most people getting started, none of those outweigh how much simpler it makes the whole thing.
Is this the easiest way to set up solar, or would you go DIY? Let me know in the comments. I'll see you out there.
Gear mentioned in this video:
The rest of my gear
Everything else I use on the road, straight from this video’s description. These are affiliate links, so buying through them supports the channel at no extra cost to you.
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