If you run a solar or battery setup, a good multimeter is one of the most important tools you can own. It tells you whether your battery is healthy and whether your panels are actually producing.
For this review, Proster sent me its Proster USB-C Rechargeable Smart Multimeter, and I used it on my entire solar battery system. I tested my 12V lithium battery, my small trickle solar panel, and my 100W solar panel, and it gave clear readings every time.
In this Proster smart multimeter review, I’ll share the readings I got, cover the specs, the screen, the smart features, safety, the pros and cons, and who it’s for.
Products Used in My Proster Multimeter Video
👉 Proster USB-C Rechargeable Smart Multimeter
For business inquiries and collaborations: luisangel@aemind.com
Affiliate Disclosure: I was sent this product by Proster to review. If you purchase an item through the links provided, I may receive a commission, at no additional cost to you. Thank you for supporting the channel.
What Is the Proster Smart Multimeter?
The Proster Smart Multimeter (model FS999L) is a 6000-count True RMS multimeter with a 5-inch color screen, a built-in flashlight, and a USB-C rechargeable battery. It has a smart auto mode that identifies what you’re measuring, and it automatically recognizes when the test lead is in the current jack.
Key Specs and Features
- 6000-count True RMS
- 5-inch color screen with backlight
- Built-in flashlight
- USB-C rechargeable battery
- Smart auto-ranging mode plus manual mode
- Automatic current jack recognition
- Measures AC/DC voltage, AC/DC current, resistance, capacitance, continuity, frequency, temperature, and diode
- NCV (non-contact voltage) detection
- CAT III 600V safety rating with dual fuse protection
- Includes test leads, alligator clips, a thermocouple, and a USB-C cable, per the listing
- 18-month warranty, per the listing
My Readings
12V Lithium Battery: 13.32V
When I tested my lithium battery, it showed a reading of 13.32 volts, so I could quickly confirm everything was working correctly.
Trickle Solar Panel
Then I checked my small trickle solar panel. The readings I showed in the video ranged from about 10.4 to 10.9 volts, and at another point around 20 to 22 volts, so I could see exactly what the panel was producing.
100W Solar Panel
I also hooked it up to my 100W solar panel through my solar charge controller, and the readings came through instantly.
The Screen and Flashlight
The 5-inch color display is super clear. I could see the data easily indoors and outdoors. The backlight and built-in flashlight make it easy to see your readings outside or in dim areas, like under a table or near tight wiring.
Smart Features
True RMS, auto-ranging, and automatic jack recognition make it simple to use, even if you’re not a pro electrician. The auto mode made switching between different tests easy. The automatic jack recognition helps avoid mistakes by detecting where the test lead is plugged in.
The NCV feature also worked well for detecting live wires without touching anything.
USB-C Rechargeable
Since it’s USB-C rechargeable, you don’t have to worry about swapping batteries all the time. It charges quickly and holds a charge well.
Safety
With the CAT III 600V safety rating, it’s built to stay safe while you’re testing solar gear or home circuits. The casing feels durable.
Proster Multimeter Pros and Cons
Pros
- Clear readings across my battery and solar panels
- Big, bright 5-inch color screen
- Built-in flashlight
- USB-C rechargeable, no battery swaps
- Smart auto mode and jack recognition, beginner friendly
- NCV live wire detection
- CAT III 600V rating
Cons
- Larger screen makes it bulkier than a pocket meter
- The internal battery needs to be kept charged
Who Is It For?
I think the Proster Smart Multimeter is a great fit for:
- Solar and off-grid system owners
- DIYers doing home electrical work
- Car owners checking batteries and circuits
- Beginners who want an easy-to-read meter
Frequently Asked Questions
What did your lithium battery read?
13.32 volts.
Is the Proster multimeter rechargeable?
Yes. It charges over USB-C.
Is it good for beginners?
Yes. The smart auto mode and automatic jack recognition make it simple to use.
What safety rating does it have?
CAT III 600V.
Final Verdict
Whether you’re working on your car, doing home repairs, or managing a solar setup like mine, the Proster USB-C Rechargeable Smart Multimeter is a super reliable multimeter that gives you clear numbers every time.
Watch My Proster Multimeter Review
In my video, I test my lithium battery and solar panels with the Proster Smart Multimeter. You can watch the full video on my YouTube channel, Ryzzun Reviews:
▶ Proster Smart Multimeter Review | Rechargeable True RMS Tester
👉 Proster USB-C Rechargeable Smart Multimeter
For business inquiries and collaborations: luisangel@aemind.com
I was sent this product by Proster to review. If you purchase an item through the links provided, I may receive a commission. Thank you for supporting the channel.