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Fuhuihe

Charge controllers, MPPT and PWM

Both kinds of controller from one supplier, which makes the difference easy to see.

PWM against MPPT

A pulse-width controller connects the panel to the battery and lets the battery pull the panel voltage down to its own level. Simple, cheap, and it discards the difference.

A maximum power point tracker finds the voltage at which the panel produces the most power and converts it. In cold weather and weak light — when a panel’s optimum voltage sits well above battery voltage — the gap is real.

What a stated amperage means

The controller’s rating is its output current to the battery, not the panel wattage. Twenty amps at 12 V is roughly 240 W of panel; at 24 V, twice that. Reading the rating without the system voltage gives the wrong panel.

What the pages mark

Whether a controller’s claimed tracking is described at all beyond the acronym, and whether the Bluetooth app is named or merely implied.

The practical check

Maximum panel open-circuit voltage. Exceeding it destroys a controller, and cold weather raises panel voltage above its rated figure.

Fuhuihe in this catalogue

  • MPPT charge controllers

    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

    Check price on Amazon Read the review
  • PWM charge controllers

    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

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.