Vansdon 20A Solar Charge Controller 12V/24V MPPT Solar Charge Controller Adjustable LCD with Timer Dual USB Ports for RV Boat Cabin Off-Grid Systems Compatible with FLD/LiFePO4/SLD/GEL/AGM

- 【?????? ?????????? ?????????????? ???????? ????% ???????????????? ????????????????????】 Harness every photon with advanced Maximum Power Point Tracking. Our solar controller continuously scans and locks onto the optimal power point of your solar array, achieving up to 99% tracking and 98% conversion efficiency. This means you squeeze the most energy from your solar panels, charging batteries faster and powering your system longer, even during cloudy or rainy days. - 【??????-???????????? ???????????????????? ?????? ?????????? ?????????? ???? ????????】 Build your solar setup with confidence. This controller safeguards your investment with a full suite of protections: reverse polarity, overcharge, over-discharge, overload, short-circuit, lightning surges, over-power, over-temperature, and reverse current. Our self-diagnostic system proactively prevents costly mistakes and hardware damage, ensuring your batteries and devices stay safe year after year. - 【?????????????????? ?????????????????????????? & ?????????? ???? ?????????????? ????????????????????】 Experience true plug-and-play versatility. solar panel charge controller automatically identifies 12V, 24V systems and is compatible with Lithium, AGM, Gel, and Flooded batteries. Got a deeply drained lithium battery?Our 0V Lithium activation function can potentially recover deeply drained Li-ion batteries, saving you the cost of a costly replacement. - 【?????????????????? ?????? ???????? ???????????????????????? ?????????? ??????????????】 The clear LCD display gives you a real-time snapshot of solar input, battery level, and output. Want your lights to turn on at dusk and off at dawn? The programmable timer allows you to automate your system, maximizing convenience and energy savings. Plus, two built-in 5V USB ports let you directly charge phones and tablets effortlessly. - 【?????????????????????? ??????????????& ???????????????? ??????????????????】 High power demands superior cooling. Our charge controllers for solar panels with a robust metal housing combines with smart temperature-controlled fans to dissipate heat effectively under high loads, ensuring long-term reliability. This prevents thermal throttling, maintains peak performance, and significantly extends the lifespan of the unit and your battery through automatic temperature compensation.

Product description

Why isn't my solar controller showing any display or power?

How much solar power can I connect to this mppt solar charge controller?

What's the maximum solar panel voltage this 20A controller can handle?

Can I connect multiple solar panels to this 20A MPPT controller?

Is this solar charge controller compatible with lithium (LiFePO4) batteries?

Why isn't my solar controller showing any display or power?

Follow these steps:

1) Connect battery to MPPT first, with correct polarity (+ to +, - to -)

2) Verify voltage: >10V for 12V systems, >20V for 24V systems.

3) Check fuses and tighten all connections.

4) Connect solar panels last.

How much solar power can I connect to this mppt solar charge controller?

The max solar power depends on your battery voltage:

12V battery: Up to 240W

24V battery: Up to 480W

This applies to all models (20A/30A/40A/60A). Do not exceed these wattages to avoid overload.

What's the maximum solar panel voltage this 20A controller can handle?

The Max PV input for this 20A MPPT is 50V. our total panel Open Circuit Voltage (Voc) (including cold weather boost) must stay under this limit. We recommend designing for ≤45V for safety. Always check your panel's Voc label before wiring.

Can I connect multiple solar panels to this 20A MPPT controller?

Yes, but with important restrictions:

For panels in series: Total Voc must stay under 50V.

For panels in parallel: Total current must stay under 18A.

Do not mix series and parallel connections on this controller.

Most setups use just 1 or 2 panels.

Is this solar charge controller compatible with lithium (LiFePO4) batteries?

Yes, it works with 12V/24V lithium batteries that have built-in BMS(Battery Management System). Controller auto-detects voltage.

Do not use lithium batteries without BMS. Ensure battery's voltage range matches standard lead-acid charging profiles.