TC20 · Solar battery maintainer
A slim panel for the time between drives.
Use daylight to support battery maintenance while a compatible vehicle is parked. The TC20 combines a 20W monocrystalline solar panel, an integrated controller and four SAE adapter options in a slim, easy-to-store kit. It suits owners looking to add solar charging to their care routine for an occasionally used car, boat or seasonal vehicle.
Made for everyday use
A closer look.
Easy to keep with your vehicle
The panel measures 15.9 × 11.9 × 0.11 inches, and the listed item weight is 1.7 lb. Its low-profile shape makes it straightforward to store between uses, with suction cups and carabiners included for positioning according to the instructions.
Four ways to reach a compatible battery
The SAE connection works with the included alligator clips, ring terminals, cigarette-lighter adapter and OBD-II adapter. This gives you a choice of connection methods after checking which one your vehicle and battery support.
Designed around battery maintenance
The control box is part of the kit. Its specified charging settings include a 14.4V charging voltage, 13.6V float voltage and 13V charge-recovery threshold for suitable 12V battery maintenance applications.
An occasionally used car
Make sunny parking time part of your battery-care routine when your car spends several days between drives.
Seasonal equipment
Use the portable panel with a compatible 12V vehicle battery during periods of lighter use, following the battery and vehicle instructions.
Match the battery before connecting
The documented application is a compatible 12V lead-acid vehicle battery. Check that its charging requirements match the controller settings and that your chosen vehicle connection supports charging. Connector fit alone does not confirm compatibility.
A complete connection kit
TC20 panel with integrated controller; SAE adapters for alligator clips, ring terminals, cigarette-lighter socket and OBD-II; four carabiners and four suction cups.
Know your equipment
Technical specifications
Connections, power ratings and practical details at a glance.
| Rated panel power | 20W |
|---|---|
| Cell type | Monocrystalline |
| Charging voltage | 14.4V |
| Float voltage | 13.6V |
| Charge-recovery voltage | 13V |
| Maximum charging current | 1.2A |
| Panel dimensions | 15.9 × 11.9 × 0.11 in |
| Output connector | SAE |
| Item weight | 1.7 lb |
For solar maintenance, place the panel in unobstructed sunlight and use the connection method specified for your vehicle.
Before you get started
A few useful answers.
Does it include a controller?
Yes. The kit has an integrated control box with the charging settings listed above.
Is 20W the charging output at every moment?
No. It is the panel’s rated peak power under standard test conditions. Actual charging varies with sunlight, positioning and battery conditions.
Can I use any of the four adapters?
Use only a method supported by your vehicle and battery. Refer to their instructions before connecting through a vehicle socket or OBD-II port.
Is it intended for a flat battery emergency?
The TC20 is a solar trickle charger and maintainer. Use equipment appropriate to the battery’s condition if it needs recovery or starting assistance.