DC 7-55V Battery Tester & Charge Monitor for Solar & RV

DC 7-55V Portable Battery Tester & Charging Monitor

Stay on top of your battery health with this compact, versatile DC 7–55V Battery Tester and Charging Monitor. Designed for lithium, iron lithium, and acid battery types, this pocket-sized LED display meter gives you an instant, accurate read of your battery's charge level — ideal for solar power systems, RVs, electric vehicles, golf carts, and off-grid setups. Made in Mainland China.

Key Features

• Multi-Battery Compatibility: Supports ternary lithium (3S–12S), lithium iron phosphate (3S–14S), and acid batteries (12V / 24V / 36V / 48V)
• Wide Voltage Range: Measures DC 7V to 55V for broad application versatility
• Custom Mode: Set your own high and low voltage thresholds for fully charged and fully discharged states
• Low Charge Alert: Red battery grid flashes automatically when charge level drops to 10% or below — keeping you aware before you run out
• Power-Off Memory: Retains your settings even after the device is powered off, so you never have to reprogram
• Bright LED Display: Easy-to-read screen in all lighting conditions
• Ultra-Compact Design: Slim profile (46 × 15 × 3 mm) — mounts neatly on any panel or enclosure
• CE Certified: Meets applicable safety and compliance standards
• Ultra-Low Working Current: ≤20mA — virtually zero draw on your battery system

Specifications

Button Operation

• Short Press: Toggle the display on or off from the normal display page
• Hold 2 Seconds: Enter the settings page to configure battery type and voltage thresholds

What's in the Box

• Battery Indicator × 1

Perfect For

Whether you're managing a solar energy bank, monitoring your RV or camper battery, or keeping an eye on an electric scooter or cart, this tester gives you the clarity you need at a glance. Its multi-mode support and customizable voltage settings make it a must-have for DIY electrical enthusiasts and off-grid adventurers alike.

Looking for other useful storage and organization solutions for your workshop or craft space? Check out our Airtight Transparent PET Storage Bottle or explore our Vintage Baroque Embossed Metal Tray – Jewelry & Décor Organizer for keeping your workspace tidy.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What battery types does this DC 7-55V battery tester support?

A: This battery tester supports three battery types: ternary lithium batteries (3S–12S), lithium iron phosphate batteries (3S–14S), and lead-acid batteries at 12V, 24V, 36V, and 48V. It also features a custom mode where you can manually set your own fully charged and fully discharged voltage values.

Q: Can I use this battery monitor for my solar power system or RV?

A: Yes! This monitor is specifically designed for use with solar power systems, RVs, electric vehicles, golf carts, and other off-grid or DC-powered setups that operate within the DC 7–55V range. Its compact size and low working current (≤20mA) make it ideal for permanent panel mounting.

Q: Does the tester remember my settings when powered off?

A: Yes. This unit includes a power-off memory storage function, which means your battery type selection and custom voltage settings are retained even after the device loses power — so you don't need to reconfigure it every time.

Q: How does the low charge alert work?

A: When the battery charge level reaches 10% or lower, the red battery indicator grid on the LED display will begin to flash, giving you a clear visual warning that your battery needs recharging soon.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.