By Cheri Sicard
Join Alex, of Footprint Hero with Alex Beale, in the video near the end of this post, for a demo of a cheap DIY solar generator that anyone can build to power their camping and RV outings.
Testing a solar generator shouldn’t break the bank. The challenge here is simple: Stick to a $250 budget to see what kind of solar generator setup someone can build and just how far it will take them. Can this dirt-cheap combo power a fridge, a laptop, or even a TV? Here’s the real-world answer after testing one of the most budget-friendly options out there.
Choosing the power station
The main picks were the EcoFlow River 2 and Bluetti AC 2A. Both are solid, but the River 2 took the win thanks to a slightly higher battery capacity and a bundle deal that included the needed solar charging adapter cable. A $70 coupon sealed the deal.
Side-by-side snapshot:
- EcoFlow River 2: Higher battery, included accessories, big coupon
- Bluetti AC 2A: Also reliable, less battery, no adapter bundled
Portable panels cost more. To keep costs down, a fixed 100 watt Eco-Worthy panel made sense. It matched the River 2’s specs for voltage and amps. Here’s how the compatibility checked out:
Quick compatibility list:
- Panel VOC: 24.5V (within River 2’s 11-30V range)
- ISC: 5.2A (well under the 8A max)
- Panel output: 100W (targeted max)
A little shopping magic brought the subtotal to $256, but with free shipping and that $70 coupon, the price landed at $248. It’s not unusual to find these kinds of deals if you keep an eye on coupons and sales.
The package included the sturdy 100-watt Eco-Worthy panel, a longer-than-usual EcoFlow adapter cable, and the compact EcoFlow River 2, plus a car charger and wall charger. The panel felt solid, and the River 2 was expectedly small but had all the key ports.
Connecting everything is easy:
- Plug MC4 connectors from the panel into the adapter cable
- Connect adapter’s XT60 end into the River 2’s solar input
- Move the panel out of shade for best results
When in some shade, no charging showed up. After repositioning for full sun, the panel charged at 62-78 watts, depending on angle.
With one hour of good sunlight, the charge jumped from 28% to 55%. A full recharge took about 3.5 to 4 hours. The EcoFlow app showed live charging numbers, making it easy to check progress while away.
This power station is versatile. It can be charged in several ways:
- Car 12V socket: up to 100 watts
- Wall AC outlet: up to 365 watts, adjustable in the app
- USB-C: up to 17 watts
The EcoFlow River 2 gives two AC outlets, each with an on/off button. Outlets sit close, so big plugs may need creative positioning. The unit runs a small inverter fan but is quiet overall. It also supports 12V DC output for things like small fridges, with live power readouts both on screen and in the app. Outlets can be switched on or off remotely through the app.
Estimating runtime and device wattage
Knowing a device’s watt rating helps estimate runtime. Find it on the label or online. To estimate: [Battery Watt Hours] x 0.85 ÷ Device Watts = Runtime in hours. With a 66-watt fridge and 217 Wh usable (256 Wh x 0.85), expect about 3 hours runtime.
Testing: What can it run?
In real-world testing, the setup powered:
- Phones, laptops, headphones (all at once)
- TV (165 watts max) and a small kitchen fridge (~50 watts)
A 1,440-watt blender failed, proving the limitations.
The River 2 offers a 600-watt surge rating for short spikes. EcoFlow calls this X-Boost, and it helps with brief heavy loads, like a hair dryer or power tool. In tests, the hair dryer tripped the system when pushed past its limits, shutting down safely.
When plugged in and powering devices, the River 2 switches to backup mode fast (around 30ms) if grid power drops. Lights briefly flicker on sensitive devices, but most gear like TVs and lamps run smoothly. For high-end electronics, results may vary.
Why not go cheaper?
An earlier $100 setup failed: The power station was dead out of the box. Even raising the limit to $200 still meant no-name brands or tiny panels. The $250 budget proved to be the sweet spot for function, value, and reliability, based on both personal experience and feedback from viewers.
RELATED
- 7 advantages of a solar generator over installing solar on your RV
- Jackery Explorer 1500 portable power station/solar generator review
- How to choose the best portable power station for your needs
RVDT2675
After 3 hours?
Lets starting to get this straight, “solar generators” are not generators, they are storage devices. They do not generate electricity, they can only store what the sun provides. There is a big lie about solar generators and the FTC should crack down on all the false advertising. So, please in future articles please refer to them as what they are power storage devices.
Bingo.
True. It annoys me when they do that.
While that may be true, that’s what MANY refer to them as, and what will show up in a search engine (needed if a website is to survive), so I for one, will continue to use the term.
Thank you for the summary, Cheri! Have a great day and safe travels!