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Simple, cheap, and honest about what it cannot recover

The best PWM charge controllers for 2026

A PWM controller is the simpler half of the shelf, and it is the right answer more often than the marketing suggests — provided the panel and the battery are voltage-matched. It works by switching the panel onto the battery and modulating that connection, so the panel ends up operating at the battery’s voltage: with a nominal 12 V panel on a 12 V battery the loss is modest, and with a 36-cell panel on a 24 V bank it is severe. That is the whole decision. Charge current is again the rating to read, and the panel voltage the controller is designed for is a hard constraint rather than a preference. Many units on this shelf carry a load output — a switched terminal for lights or a pump, with a timer or a dusk sensor — which an MPPT controller often lacks, and which makes a PWM unit the neater answer for a garden light or a gate. Battery profiles and protections read as on the MPPT shelf, and the display is usually a small LCD rather than an app. We compare charge current, panel voltage matching, battery profiles, load output and its control, display, protections and terminals.

Every machine on this shelf, side by side

  1. Depvko 30 A PWM, 12 V/24 V, with timer

    30 A charge · automatic 12 V/24 V matching · lead-acid ONLY, lithium explicitly excluded · load output with timer · industrial microcontroller · LCD · over-current, short circuit, open circuit, reverse, low voltage, over-charge · terminals not described

    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.

    Best for: A small lead-acid installation — a shed, a gate, a caravan — where simplicity is the point.

    ≈ $10 / £10 / €12

    Check price on Amazon Read the review

  2. Fuhuihe 20 A PWM, 12 V/24 V, Bluetooth, charge statistics

    20 A charge · 12 V/24 V lead-acid · five standard battery types including LiFePO4 · USB output · Bluetooth with mobile application · display present · over-voltage, over-current, charge short circuit, short circuit · terminals not described

    A 20 A PWM controller with Bluetooth and charge statistics, offering five standard battery types including lithium iron phosphate, with a named iOS application.

    Best for: A small lithium bank on a PWM budget, where the statistics matter more than the current.

    ≈ £30 / €24

    Check price on Amazon Read the review

  3. Thlevel 30 A PWM, 12 V/24 V, 133 × 70 × 35 mm

    30 A charge · automatic 12 V/24 V identification · lead-acid only · USB output 5 V/2 A · industrial microcontroller with adjustable charge and discharge parameters · no display stated · short circuit, open circuit, reverse, overload · dual MOS reverse-current protection

    A 30 A PWM controller with published dimensions and weight, a 5 V 2 A USB output, adjustable charge and discharge parameters and three-stage PWM management.

    Best for: A tight enclosure where the controller has to fit a measured space and nobody will be reading a screen.

    ≈ €12

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  4. YIWUTRADE 80 A, 12 V/24 V, LCD

    80 A charge · 12 V/24 V · battery profiles not published · load output not described · control not described · LCD display · protections not published · terminals not described

    An 80 A solar charge controller for 12 V and 24 V systems with an LCD display, whose listing consists of a single bullet repeating the title.

    Best for: Nothing this page can identify, which is the finding rather than a judgement on the product.

    ≈ £48 / €50

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A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.