> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# SparkFun Sunny Buddy - MPPT Solar Charger

**Type:** Product page · **SKU:** PRT-12885 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-sunny-buddy-mppt-solar-charger.html ([markdown](https://core-electronics.com.au/sparkfun-sunny-buddy-mppt-solar-charger.html.md))

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

## Pricing

- **Price:** $54.35 (inc GST) — $49.41 AUD, exc GST
- **Quantity discounts:** 5+ $47.93 (exc GST) · 25+ $46.94 (exc GST) · 100+ $44.96 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 17 and Aug 18.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=PRT-12885:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/PRT-12885:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This is the Sunny Buddy, a maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is easy as well, just plug your solar panel into one side of the Sunny Buddy and your battery into the other 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. This revision also adds a potentiometer to the input to set the holding voltage for MPPT and we’ve also tweeked the feedback resistors on the output to change the float voltage.

Documents:

- [Schematic](https://core-electronics.com.au/attachments/localcontent/SunnyBuddy-v13a_16362888aaf.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/SunnyBuddy-v13_1376683c40f.zip)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/LT3652_2818368b07a.pdf) (LT3652)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/sunny-buddy-solar-charger-v13-hookup-guide-)
- [Weather Station Tutorial](https://learn.sparkfun.com/tutorials/weather-station-wirelessly-connected-to-wunderground)
- [GitHub](https://github.com/sparkfun/SunnyBuddy/tree/v13) (Design Files)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/r/prt-12885-01.jpg)