Simple, cheap, and honest about what it cannot recover · review

Depvko 30 A PWM, 12 V/24 V, with timer review

A 30 A PWM controller for 12 V and 24 V systems with a timer, whose third bullet states in capitals that it must NOT be used with lithium or nickel batteries.

By Jean-Benoit Buisson

The bottom line A simple PWM controller that states its chemistry limit in capitals and describes every protection as self-recovering. It publishes no PV ceiling and no terminal capacity, which are the two figures an installation needs.

A 30 A PWM controller for lead-acid batteries, and it says so.

The capitalised exclusion

The third bullet: suitable only for lead-acid batteries, including flooded, sealed and colloidal — and do NOT charge lithium or nickel cells. Stated plainly, in capitals, in the middle of the listing. Two other PWM controllers in this catalogue name lithium among their compatible types; this one draws the line.

Automatic recovery

All six protections are described as automatically recovering types. On a controller in a shed or on a gate, that is the difference between a fault that clears itself and a journey with a screwdriver.

The two figures missing

Maximum PV input voltage, and terminal capacity. The first decides whether an array can be connected at all; the second decides what cable fits. At 30 A both matter.

PWM, honestly

No claim to track anything. This is a pulse-width controller and the listing does not dress it up, which after two controllers in this catalogue that describe their MPPT in terms that are not tracking, is worth noting.

Availability

German, French, Italian and Spanish Amazon stores quoted 12 € to 16 € when this page was compiled.

American and British Amazon stores carry it too, priced in their own currency, which the euro range above deliberately omits.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

What it gets right, and what it leaves out

Strengths

The exclusion of lithium is stated in capitals rather than left to be discovered
All six protections are described as automatically recovering, which matters on an unattended installation
The cheapest controller in this catalogue

Compromises

No maximum PV input voltage
No terminal capacity, so cable size at 30 A cannot be checked
PWM rather than MPPT, which costs yield on a mismatched panel

Specifications

Charge current	30 A, from the title
Panel voltage matching	Automatic 12 V and 24 V system detection with no manual adjustment, second bullet; no PV voltage ceiling is published
Battery profiles	Lead-acid only — open, sealed and colloidal — with lithium and nickel batteries explicitly excluded in the third bullet
Load output	Present, with a timer and automatic parameter setting, from the title
Control	Built-in industrial microcontroller automatically managing panels and battery, first bullet
Display	LCD, from the title
Protections	Over-current, short circuit, open circuit, reverse connection, low voltage and over-charge, all with automatic recovery, fourth bullet
Terminals	Nowhere in the listing
Amazon reference	B08NFSCZ4V (same reference on 6 Amazon marketplaces)
EAN	0713484981245

Questions owners ask about this one

Why does it matter that lithium is excluded?

Because a lead-acid charging profile applied to a lithium pack is wrong in both voltage and termination. The pack’s management system will defend itself, but the charging will not work properly. This listing says so in capitals, which two of the four PWM controllers here do not.

What does PWM cost against MPPT?

PWM ties the panel to the battery voltage and discards the difference; MPPT converts it. On a 12 V battery with a panel whose maximum power voltage is well above that, the difference is real. On a small, well-matched system it is modest, and PWM is cheaper and simpler.