RecPro RV Tank Monitor Panel M21 (Black) — 12V LED Tank & Battery Level Indicator

The RecPro M21 Panel Only (Black) is a compact 12V monitor panel that displays fresh, gray, and black tank levels plus battery voltage using an easy-to-read light indicator system.

If you need a simple, reliable way to keep track of your RV holding tanks and battery state without swapping out cabinetry, the RecPro M21 mounts neatly into a dash or wall cutout. This panel is sold as the face/control unit only, designed to pair with your RV's wiring and sensors, and comes in a black finish to blend with darker interiors. The M21 prioritizes clarity over complexity: colored LEDs show each tank's level and battery status so you can make quick decisions while traveling, camping, or boondocking.

How does the M21 show tank and battery status?

The M21 uses a bank of indicator lights to represent each monitored circuit—fresh, gray, black tanks and the house battery. Lights illuminate at progressive intervals so you can see whether a tank is near empty, half, or full. Battery voltage is shown with a separate LED sequence that reflects charge level.

• Distinct LEDs for each tank and battery for at-a-glance reading
• Progressive illumination (quarter/half/three-quarter/full) for tank levels
• 12V wiring interface connects directly to existing sensors
• Black bezel designed to match darker RV interiors

What installation and wiring does this panel require?

The M21 is the panel only, so installation requires connection to your RV's 12V system and existing tank sensors or compatible senders. You will need a standard rectangular cutout for flush mounting and basic electrical wiring skills or the help of an RV technician to tie into sensor leads and power.

• Designed for 12V systems common in RVs and campers
• Requires sensor leads for fresh/gray/black tanks and battery sense wire
• Flush-mount into a standard panel opening; screws and gasket recommended
• Professional installation advised if you are unfamiliar with RV electricals

What practical benefits will I notice day-to-day?

With the M21 installed you'll reduce guesswork about tank pump schedules, black tank flush timing, and when to recharge your battery. The LED display helps prevent overfilling and avoids unnecessary trips to dump stations or shore power, letting you plan stops and conserve resources.

• Quick visual checks before driving or overnighting
• Avoid accidental overfill of gray or black tanks
• Monitor battery voltage to prevent unexpected power loss
• Simple interface reduces distraction while on the road

Who is this for? The RecPro M21 Panel Only (Black) is aimed at RV owners, renovators, and DIYers who want a straightforward, space-saving monitor that pairs with their existing sensors. It's ideal if you prefer a minimalist, black-finish control face to match darker RV interiors, need a reliable visual tank/battery indicator, and either have the skills to wire it in or access to an RV technician. Because this listing is panel-only, buyers should confirm they have compatible sensor wiring or plan to purchase senders separately.