UDPOWERReviews of udpwr.com

Response from UDPOWER· Sep 2, 2026

We’re very sorry to hear that the connection cords were missing from your package. Please contact our support team at [email protected] with your order number and a brief description of the missing accessories. Our team will check your order and help resolve the issue as soon as possible. Thank you for bringing this to our attention, and we apologize for the inconvenience. — UDPOWER Support Team

Response from UDPOWER· Oct 14, 2025

Hi there, Thanks for reaching out—and I’m sorry for the hassle. Yes, every UDPOWER unit is QC-tested before shipping (safety, input/output, and functional checks). That said, solar setups can vary a lot, and third-party panels are the most common source of charging issues due to connector/polarity/voltage mismatches. To help you fast, could you share: The brand & model of your solar panel(s) A photo of the spec label on the panel (showing Voc/Vmp/Imp) Which cable/adapter you used (e.g., MC4→DC plug/XT-style), and which port you tried on the S1200 Your order number. Quick checks you can try now: Verify panel specs vs. the S1200’s DC input specs. If the panel’s open-circuit voltage (Voc) is outside the allowed range, the S1200 won’t start charging. Direct sun test: point the panel directly at the sun at midday; wipe dust; avoid glass/mesh; disconnect any USB regulators. Cable & polarity: ensure positive/negative aren’t reversed; avoid step-up/step-down controllers between the panel and S1200. One panel first: test a single panel alone (no series/parallel). Wall-charge sanity check: plug into AC wall charging for a few minutes to confirm the input system is responding (helps isolate whether the issue is solar-side). Important note: we don’t recommend third-party solar panels because some have incompatible voltages, non-standard wiring, or built-in controllers that block MPPT handshakes. Once you share the panel brand/model, I’ll confirm compatibility and the correct hookup for your S1200. If anything looks off after that, we’ll take care of you. Best regards, UDPOWER Support