Best Solar Panels for the EcoFlow DELTA Pro: Series Strings Up to 150V

For the EcoFlow DELTA Pro, the strongest verified setup is 6 x EcoFlow 220W NextGen panels in series (129V open-circuit, 1,320W). Good alternatives are 3 x 400W rigid or 3 x 400W Lightweight in series (1,200W). The DELTA Pro has a single solar port rated 11-150V, 15A and 1600W, so long series strings are the way to use it.

How the DELTA Pro’s solar port works

The EcoFlow DELTA Pro has one solar/car charging input. Its high voltage limit (150V) suits series wiring, where panel voltages add up and the current stays the same. Its 15A current limit makes parallel wiring hard: two 220W panels in parallel would be 24.8A.

We keep a 5% margin under the voltage limit, so every string below stays at or under 142.5V open-circuit.

Compatibility table

What fails the check: 7 x 220W or 7 x 160W in series, and 4 x 400W in series (all over the voltage margin); any parallel pair of 160W, 220W or 400W rigid panels (over 15A); and 5 x 125W in parallel (16A).

A few cable notes:

• 400W rigid: the listing is two panels with no cable. Three in series means buying two packs (one panel spare) plus EcoFlow’s Solar to XT60i cable.
• 400W Lightweight: EcoFlow PH says series is recommended for this panel and the series cable is sold separately. We couldn’t identify the exact cable, so ask EcoFlow PH which one to buy.
• 125W in series: the MC4 adapter cables needed for series come only in the 500W (4 x 125W) set. For single panels, use parallel.

Example: solar charge time

6 x 220W in series is 1,320W rated.

• Example assumption: panels deliver about 70% of their rating in real Philippine sun.
• 1,320W x 0.7 ≈ 924W.
• 3,600Wh ÷ 924W ≈ 3.9 hours of strong sun.

With an example 4.5 peak sun hours a day, that’s about one sunny day from empty. Three 400W panels (about 840W real) would take closer to 4.3 hours. These are estimates, not test results.

Setup steps

1. Unfold the panels in full sun, clear of shade from walls, trees and wires.
2. Join the panels in series: the male MC4 lead of one into the female MC4 lead of the next. Use EcoFlow Solar Extension Cables if the leads don’t reach.
3. Connect the free plus and minus leads at the ends to the MC4-to-XT60i cable, and plug it into the DELTA Pro’s solar input.
4. Check that the input watts show on the screen.

A six-panel string runs well over 100V DC. Keep the connectors dry and off wet ground, and don’t handle them in the rain. Portable panels on the ground are plug-and-play and you can set them up by following the manual. Mounting panels on the roof, or connecting the DELTA Pro to your home’s wiring, needs a licensed electrician and an LGU electrical permit.

What to buy

• EcoFlow DELTA Pro on Shopee (EcoFlow Philippines store)
• 6 x EcoFlow 220W panel on Lazada, or
• 2 packs of the EcoFlow 400W Rigid panel on Lazada plus EcoFlow’s Solar to XT60i Charging Cable
• Optional: the EcoFlow DELTA Pro Extra Battery on Shopee. EcoFlow says two DELTA Pro Smart Extra Batteries take the system to 10.8kWh. Extra batteries add storage; plan your solar around the DELTA Pro’s own 1600W input.

Check today’s price before buying. Compare specs on our DELTA Pro buyer’s guide and estimate runtime with the EcoFlow runtime calculator.

Bottom line

Build one long series string. Six 220W NextGen panels is the most solar you can verifiably put into a DELTA Pro, and three 400W panels is the simpler alternative. Skip parallel wiring except with the 125W Bifacial.