SparkFun Sunny Buddy - MPPT Solar Charger

Description

This is the Sunny Buddy, with maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar charger provides you with the ability to get the most out of your solar panel or other photovoltaic device and rechargable LiPo battery. Set up is easy as well, just plug your solar panel into one side of the Sunny Buddy and you are good to start charging!

The output of the Sunny Buddy is intended to charge a single polymer lithium ion cell. The load should be connected in parallel with the battery. By default, the Sunny Buddy comes set to a maximum charge current of 450mA with a maximum recommended input of 20V (minimum 6V). It's recommended that batteries not be charged at greater than their capacity rating; thus, the smallest battery that should be charged with the Sunny Buddy is 450mAh.

Each Sunny Buddy comes equipped with a LT3652 power tracking 2A battery charging circuit and pre-installed barrel jack and 2-pin JST connectors with unpopulated areas to install your own personal 3.5mm screw terminals for added input / output options. The voltage of the float voltage
TECHNICAL INFO:
Schematic 
Eagle Files 
Datasheet (LT3652) 
Hookup Guide 
Weather Station Tutorial 
GitHub (Design Files)

Product information