Rank #5 in Best Solar Panels 2026: 10 Ranked, and Where the Wattage Doesn't Add Up
ECO-WORTHY 390W Bifacial Solar Panel Kit
Price and rating as shown on Amazon when we collected them. Both change.
The ECO-WORTHY 390W 12V Bifacial Solar Panel Kit is a two-panel setup aimed at motorhomes, caravans, boats and off-grid builds. It arrives with mounting brackets, 16ft solar cables, Y-branch connectors and a 30A charge controller, and it sits at number 5 in our guide to the best solar panels at £239.99, rated 4.5 out of 5 from 103 Amazon ratings.
Its listing is one of the clearest examples of the problem this guide is built around. The title says 390W, and the bullets and package list back that figure up, describing 2pcs of N-Type 195W panels plus a 30A controller. The spec sheet, on the same page, puts Maximum Power at 340 Watts. The efficiency figures disagree as well: the bullets claim 25% conversion efficiency, the spec sheet field says 23%. At the 390W the title promises, £239.99 works out at about 62p per watt; at the 340W the spec sheet lists, it works out at about 71p. The listing also claims 1.56kWh per day under 4 hours of full sunlight, and lists the kit at 23.5kg. Everything on this page is taken from the Amazon listing, not from testing we carried out.
How those 103 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £239.99 |
|---|---|
| Customer rating | 4.5 out of 5 from 103 ratings |
| Maximum Power (spec sheet) | 340 Watts |
| Panels in the box (bullets and package list) | 2 x 195W N-type bifacial — 390W total, matching the title |
| Conversion efficiency | 25% in the bullets, 23% in the spec sheet (as listed) |
| Charge controller | 30A, with built-in short-circuit, open-circuit and over-load protection |
| Output voltage | 12 Volts (DC) |
| Item weight | 23.5 kg |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Nice kit, only downside brackets should be pre drilled and no fixing screws supplied.”
Verified purchase“1 panel arrived broken but another sent out straight away, great customer service.As for the performance of the kit, im very happy, ive seen over 200w of charge to my battery and could definitely get more under ideal circumstances. Has kept my 300ah battery fully charged without any other sorce of power. Ive done hoovering, used a coffee pod machine, used power tools, kept a small fridge running, and charged a jackery power station. Ive not had to worry about power usage at all!I've heard you will get more efficiency from a more expensive solar charger but ive been getting enough power not to worry about it for now, maybe I'll upgrade if I go traveling in winter.The supplied fitting brackets dont work well on my van roof but ive adapted them and all seems well.I'd definitely recommend this kit and eco-worthy”
What it is up against
The rivals it was ranked against in Best Solar Panels 2026: 10 Ranked, and Where the Wattage Doesn't Add Up.
Questions people ask
What power output does the ECO-WORTHY 390W kit actually produce?
Two different numbers appear on the same listing. The title, the bullets and the package list describe 2pcs of 195W N-type panels, which adds up to 390W; the spec sheet's Maximum Power field says 340 Watts. ECO-WORTHY does not explain the gap on the page.
What charge controller comes with this ECO-WORTHY kit?
A 30A solar charge controller with build-in short-circuit, open-circuit and over-load protection. The listing states it supports three battery types: lithium, lead acid and gel, and it carries 2 USB ports rated 5V 2A.
Is the efficiency 25% or 23%?
Both are printed on the listing. The bullet for the N-Type 18BB cells claims 25% conversion efficiency and 18 busbars; the Efficiency field in the spec sheet reads 23%.
How much does the ECO-WORTHY 390W kit weigh?
23.5 kg, as listed in the spec sheet. That covers the kit sent in two packages: the panels in one, the controller, cables and brackets in the other.
How is the daily output described?
The bullets say Generate 1.56kWh per day under 4 hours full sunlight, and the item highlight repeats 1.56kWh/Day for the 2x195W panels with the 30A PWM controller. That is an ECO-WORTHY estimate, not a measured figure.
Can the ECO-WORTHY kit be mounted on a van roof without drilling?
The listing says the panels have pre-drilled holes and Plug&Play cables on the back, and that the No-Drill solar corner bracket preserves the van roof's integrity. One buyer reports the brackets were not pre-drilled and no fixing screws were supplied.
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