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MPPT converts surplus voltage into amps; PWM throws it away

The best MPPT charge controllers for 2026

A charge controller stands between a solar panel and a battery, and the two technologies on the market do genuinely different things. A PWM controller connects the panel to the battery and lets the battery pull the panel down to its own voltage, which wastes the difference; an MPPT controller runs a converter that turns that surplus voltage into extra current, and the gain is real whenever the panel voltage sits well above the battery voltage — which is most of the time with modern panels. The rating that matters is the charge current in amps, because that is the ceiling on what reaches the battery, and the second is the maximum PV voltage, which must survive the panel’s open-circuit voltage on the coldest morning of the year. Tracking efficiency and conversion efficiency are published separately by the better makers and describe two different losses. Battery profiles decide compatibility: a controller with a lithium profile and a user-defined profile can charge anything on this site; one with only a flooded lead-acid curve cannot. Then the practical parts — a display or an app, the terminal sizes, the fusing the maker requires, and the enclosure rating if it lives in a locker. We compare charge current, maximum PV voltage, efficiency, battery profiles, monitoring, wiring sizes and enclosure.

Every machine on this shelf, side by side

  1. Y&H 40 A, 12 V/24 V, dual USB, LCD

    40 A charge · maximum PV voltage not published · efficiency not published · lead-acid only, described also as suitable for NiMH and Li-ion · LCD with dual USB · wiring sizes not published · enclosure not rated

    A 40 A controller for 12 V and 24 V systems with an LCD and two USB ports, whose own listing describes its MPPT technology as detecting maximum charge current rather than tracking a power point.

    Best for: Nothing this page can recommend with confidence, given the contradiction on its own first line.

    ≈ €18

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  2. Fuhuihe 100 A, 12/24/36/48 V, waterproof, LCD

    100 A charge · maximum PV voltage not published · tracking efficiency not less than 99 % · sealed, gel, flooded and LiFePO4 · LCD with single-touch settings and seven modes · wiring sizes not published · described as waterproof without a rating

    A 100 A controller for 12 to 48 V systems with dual 5 V USB ports, single-touch settings and protection against over-voltage, over-current, over-charge and deep discharge.

    Best for: An outdoor or semi-exposed installation where the protections list is the deciding factor.

    ≈ £45 / €49

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  3. POWLSOJX 100 A selectable, 12/24/36/48 V, seven modes

    60/80/100 A selectable · maximum PV voltage not published · MPPT algorithm named, efficiency not published · lead-acid and lithium · backlit LCD with live data and fault codes · wiring sizes not published · three-layer protection

    A controller selectable at 60, 80 or 100 A for 12 to 48 V systems, with seven intelligent modes including dusk-to-dawn operation for street lighting.

    Best for: A street lighting or garden installation where the timing modes do most of the work.

    ≈ £43 / €38

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  4. SOGTICPS 100 A, 12/24/36/48 V, 100 V PV maximum

    100 A charge · 100 V maximum PV input · tracking efficiency not less than 99.5 % · sealed, gel, flooded and LiFePO4 · LCD with clock and seven modes · wiring sizes not published · enclosure not rated

    A 100 A controller for 12 to 48 V systems with a published 100 V PV input ceiling, whose listing describes it as combining MPPT and PWM charging technology.

    Best for: A 48 V off-grid array whose string voltage is already known to sit under 100 V.

    ≈ £40 / €36

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  5. Victron Energy SmartSolar MPPT 100/20, 20 A, 100 V PV maximum, 12/24/48 V

    20 A charge · 100 V maximum PV input, in the model name · multi-stage adaptive algorithm · presets for common types plus fully custom profiles · Bluetooth with VictronConnect and GX compatibility · wiring sizes not published · enclosure not rated

    A 20 A SmartSolar controller whose model number states its limits — 100 V input, 20 A output — with a multi-stage adaptive algorithm, battery presets and integrated Bluetooth.

    Best for: A system that will grow, where the controller has to fit into a wider monitoring installation later.

    ≈ $79 / £70 / €71

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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.