Optimate Solar Duo 40W, TM522-D4, 6-Step 12V / 12.8V 3.3A Weatherproof Solar Battery Saving Charger & maintainer

★★★★★ 4.7 124 reviews

$180.95
Price when purchased online
Free shipping Free 30-day returns

Sold and shipped by constructioncleanla.com
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here.
$180.95
Price when purchased online
Free shipping Free 30-day returns

How do you want your item?
You get 30 days free! Choose a plan at checkout.
Shipping
Arrives May 9
Free
Pickup
Check nearby
Delivery
Not available

Sold and shipped by constructioncleanla.com
Free 30-day returns Details

Product details

Management number 216034152 Release Date 2026/04/19 List Price $72.38 Model Number 216034152
Category
  • Ideal for a stored car, truck, boat, 12V boatlift, or RV deep cycle batteries.
  • Includes 40W panel ready for permanent mounting, DUO charge controller, and 2 x battery connection cables.
  • Connect to the battery directly with included battery clips or fused battery lead.
  • DUO charge controller – works with 12V lead-acid & 12.8V lithium (LFP / LiFePO4) batteries
  • Fully automatic – the DUO controller accurately charges & maintains the battery by day and monitors it at night.
Brand Name OptiMate
Efficiency High Efficiency
Unit Count 1.0 Count
Item Weight 3.81 Kilograms
Manufacturer TecMATE
Model Number TM-522-D4
Material Type Polycrystalline Silicon, Aluminum, Tempered Glass, Polymer Backsheet
Maximum Power 40 Watts
Connector Type USB
Item Type Name Sealed solar battery saving charger
Output Voltage 12 Volts (DC)
Maximum Voltage 12 Volts
Amperage Capacity 3.33 Amps
Included Components Polycrystalline solar panel & OptiMATE Solar DUO controller
Manufacturer Part Number TM-522-D4
Item Dimensions L x W x H 27.76"L x 2.17"W x 31.5"H
Manufacturer Warranty Description 3 year limited warranty

Correction of product information

If you notice any omissions or errors in the product information on this page, please use the correction request form below.

Correction Request Form

Customer ratings & reviews

4.7 out of 5
★★★★★
124 ratings | 51 reviews
How item rating is calculated
View all reviews
5 stars
86% (107)
4 stars
2% (2)
3 stars
1% (1)
2 stars
1% (1)
1 star
10% (12)
Sort by

There are currently no written reviews for this product.