OYMSAE 12W Solar Car Battery Charger Portable 12V Trickle Battery Charger & Maintainer Waterproof Solar Panel for Car Boat Automotive RV

Price: $20.99
(as of Jul 15, 2026 00:09:33 UTC – Details)

Product description

OK 12v solar system charge multiple batteries simultaneously?

Yes, It is ok connect multiple batteries in series and parallel .Keep the combined battery voltage will always at 12v. Either connect two 6v batteries in series or parallel multiple 12v batteries.

When the controller stop charging the battery ?

12v battery ,the controller will stop charging when indicating that the battery is fully charged .When the battery drops to a maintainable level ,the controller will resume charging.

Why test voltage over 20V ?

The 20v is the open-circle voltage of the solar panel ,not the charging voltage .Test voltage ensure that the solar panel system remains connected to the battery .

Overcharge protect my batteries?

The built in controller includes overcharge protection .

[Long-term Battery Maintainer]Perfect for keeping car, boat, RV and motorcycle 12V batteries charged when idle for weeks. No need to disconnect batteries or start vehicles regularly, effectively avoid dead battery issues.
[Clear LED Charging Indicator]Real-time status visible at a glance: Blue for sunlight standby, Red for charging, Green for fully charged. All lights off when short circuit occurs for easy safety check.
[Full Intelligent Protection]Upgraded PCB with built-in microprocessor supports overcharge, overvoltage, short circuit and reverse charging protection. Trickle charging design safely maintains 12V batteries without overcharging.
[High Conversion & Waterproof Durability]Frosted convex surface improves light absorption and photoelectric conversion efficiency. PET waterproof dustproof material plus epoxy base plate, works well even on cloudy days and outdoor harsh environments.
[Plug & Play Easy Installation]Comes with SAE cable, alligator clips, carabiner and suction cup. Plug into cigarette lighter or clip to battery terminals, finish connection in 3 minutes. Widely fits car, truck, boat, ATV, tractor and more 12V devices.

Product summary

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