Name: PWM Solar PV Charge Controller 10A/20A/30A | 4Boats
Brand: MidMarine
SKU: MD1209/10
Price: 10.99 GBP
Availability: InStock

PWM Solar PV Charge Controller 10A / 20A / 30A - 4Boats

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Style

10A

20A

30A

£10.99

Tax included.

PWM Solar PV Charge Controller

Available in 10A, 20A, and 30A Models

This PWM (Pulse Width Modulation) Solar PV Charge Controller regulates the charging and discharging of lead-acid batteries in marine, caravan and off-grid photovoltaic systems. Microcontroller-based with a clear LCD display, it automatically detects 12V or 24V systems and protects your battery against overcharge and deep discharge to prolong its life.

RELIABILITY: Built-in protection against overload, short circuit and reverse polarity, plus an equalisation charge to maximise battery capacity and correct cell imbalance.

Key Features

✔ 12V/24V auto-detect system voltage
✔ LCD for solar, battery and load monitoring
✔ Dual USB ports (5V/3A max) for mobile charging
✔ Programmable load timer (dusk-to-dawn, 1–23 hours or 24-hour)
✔ All charge/discharge thresholds adjustable

Technical Specs

Rated Charge/Discharge Current:	10A / 20A / 30A (by model)
System Voltage:	12V / 24V Auto
Max PV Input:	50V (do not exceed)
USB Output:	5V / 3A (Max)
Float Charge:	13.7V (Adjustable)
LVD Threshold:	10.7V (Adjustable)
LVR Threshold:	12.6V (Adjustable)
Operating Temperature:	-35°C to +60°C
Self Consumption:	<10 mA
Dimensions:	150 x 78 x 35 mm
Weight:	Approx. 150g
4Boats SKU:	MD1209/10, MD1209/20, MD1209/30

Compatibility / Fitment Guide

Battery Type	Application	Notes
Sealed	Marine & RV	Factory Default (14.4V, adjustable)
Gel	Solar Lighting	Preset 14.2V
Flooded	Off-Grid Systems	Preset 14.6V
Lithium / other	Not suitable	Lead-acid only

OEM Cross Reference

4Boats SKU

MD1209/10 (10A), MD1209/20 (20A), MD1209/30 (30A)

Questions & Answers

Is this a genuine original part?

This is a quality aftermarket PWM charge controller, not a branded original-equipment part.

How do I know which amperage (10A/20A/30A) I need?

Select the model based on your solar panel output current, leaving a safety margin. For example, a 100W 12V panel (approx. 5.5A) suits the 10A model; larger arrays need the 20A or 30A model. Keep the solar input below 50V.

Is this controller compatible with Lithium (LiFePO4) batteries?

No. It is designed for lead-acid batteries only (Sealed, Gel, Flooded) and is not suitable for lithium or other battery types.

Note: Always connect the battery first, then the solar panel, then the load, observing polarity, and select the correct battery type. Reverse the order when disconnecting.

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

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PWM Solar PV Charge Controller 10A/20A/30A | 4Boats