Renogy 220W Lightweight Portable Solar Suitcase Review: EcoFlow Delta 2’s Official Pairing

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EcoFlow’s own official setup for the Delta 2 uses two 220W panels wired in parallel to reach its 500W solar ceiling — and the Renogy 220W Lightweight Portable Solar Suitcase is built to exactly that spec, just without the EcoFlow branding markup on the price. Buy two, wire them in parallel, and you’re within touching distance of the Delta 2’s full solar input.

It’s not a panel you buy once. This one only does its job properly as a pair — which changes the maths on price, storage, and setup compared to a single-panel solution.

Renogy 220W Lightweight Portable Solar Suitcase Specs

• Max power: 220W (per panel)
• Open-circuit voltage: 23.6V
• Optimum operating voltage: 20.0V
• Optimum operating current: 11A
• Cell efficiency: 22.70%
• Unfolded dimensions (with handle): 1843 x 730 x 20mm
• Folded dimensions: 460 x 690 x 80mm
• Weight: 7.20kg per panel
• IP67-rated, fibreglass-reinforced construction
• Warranty: 3 years on materials and workmanship

Two Panels, Wired in Parallel, Matching EcoFlow’s Own Design

The Delta 2 accepts up to 500W of solar input. Two of these panels wired in parallel gets you to 440W — comfortably within that ceiling, with headroom rather than a knife-edge exact match. It’s the same configuration EcoFlow themselves specify for their own-brand panels, which means there’s no guesswork about whether the pairing actually works — it’s the reference design, just at a lower price than the branded equivalent.

Buying a single panel here doesn’t get you to a useful outcome — you’ll be running well under what the Delta 2 can accept. This is genuinely a two-panel purchase.

Weight and Storage for a Pair

At 7.20kg each and folding down to 460 x 690 x 80mm, two of these together is a real amount of kit — roughly 14.5kg combined, needing proper storage space rather than a cupboard shelf. Worth factoring in before buying, particularly if space at home is already tight.

Wiring Two Panels in Parallel

Unfold both panels and position them facing the same direction and angle — an uneven pairing (one shaded, one in full sun) drags the whole array down to the weaker panel’s output. Each Renogy 220W Lightweight Portable Solar Suitcase panel has its own pair of MC4 leads, and getting them into a single connection to the Delta 2 means a parallel (Y-branch) MC4 adapter cable, not simply plugging both sets of leads into the same port.

Once both panels feed into the Y-branch and that single lead connects to the Delta 2’s solar input, the unit’s display shows combined incoming wattage rather than two separate readings. If one panel is shaded or disconnected, the other keeps charging independently — that’s the practical benefit of parallel wiring over a single larger panel.

What the Rest of the Team Think

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Pros and Cons

Pros

• Matches EcoFlow’s own official two-panel parallel design for the Delta 2 — proven pairing, lower price than the branded equivalent
• Two independent charging paths — one panel failing still leaves partial input rather than none
• IP67-rated, fibreglass-reinforced for genuine outdoor use
• 3-year warranty on materials and workmanship

Cons

• Only useful as a pair is using for a Delta 2 — a single panel leaves you well under the Delta 2’s usable input
• Combined weight (~14.5kg) and folded size for two panels needs real storage space
• Buying two at once is a bigger single purchase than most single-panel alternatives

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