Jiditech CX-25W solar panel review: cheapest 18V panel

The Jiditech CX-25W is the cheapest real panel in this roundup at around ₱1,000: 25W at 18V, sized for trickle-charging a 12V battery. Almost nothing about it is published.

What is it for?

A specific, useful job the big panels do not do: keeping a 12V battery alive. A car that sits parked for weeks, a motorbike, a boat, a small shed light. The panel puts back what the battery loses to self-discharge so you are not jump-starting it every time you come back.

25W at 18V is the standard shape for that task, and monocrystalline cells are the same type used in the branded panels here.

What do you need to add?

A charge controller. An 18V panel wired straight to a 12V battery can overcharge it, which shortens the battery’s life or worse. A basic controller is cheap, but it is a second purchase, so count it when you compare this against alternatives.

What is not published?

Most of it, and this is the honest reason it sits low in our ranking. Jiditech publishes:

• no efficiency figure, so there is no way to compare it against the 23% and 25% ratings elsewhere here
• no weight
• no IP rating, where every EcoFlow panel in this roundup documents one

For a panel meant to live outdoors on a dashboard or a shed roof, a missing weather rating is the gap that matters most. We would not leave it exposed without knowing what it is sealed against.

Is it sulit?

Around ₱1,000 as of August 2, 2026. Check the latest price on Shopee. On raw arithmetic it is roughly ₱40 per watt, the lowest number in this roundup by a wide margin.

That figure needs a caveat, though, and it is a big one: cost per watt only compares like with like. These are 25 watts you cannot point at a power station, from a brand that publishes no efficiency rating, and you still need a controller. Against a documented panel the comparison is not really apples to apples.

For its actual job, keeping a parked battery topped up, it is cheap and it works. Just do not read that number as “best value panel here”.

Who should buy it

Buy this if you need to keep a car, motorbike, or boat battery from going flat and you are comfortable adding a charge controller. It is the wrong buy if you own a power station, because 25W at 18V is not what that input wants. See how it ranks in our best solar panels in the Philippines roundup, or browse more on our Home Improvement page. Our solar panel buying guide explains charge controllers and panel voltages.

Alternatives to consider

If you want a documented panel for a power station instead, the EcoFlow 125W Bifacial is our Best Overall at around ₱9,000 with a full published spec sheet. If you want a local brand with service behind it, the Firefly FSP120/18 is a 120W folding panel at around ₱13,500.