Recent content by Chris Nafis

Who knew that RYOBI made 24V Tools and Batteries! Apparently they only made a Weed Wacker and Hedge Trimmer. Hopefully you don't own one because they discontinued the 24V line and you can't find replacement batteries for them. My friend picked up a 24V Weed Trimmer at a garage sale. The two...

I thought it would be useful if we could use our RAD eBike battery for back-up power or for camping. I designed and 3D printed a battery adapter. I also verified that you can use an MPPT solar charge controller to charge the battery. You can charge it at 120W while using the output power. Now we...

I bought my wife a second battery for her Rad Power Radcity Step-thru 3 (2021) eBike. I needed some way to attach it to the bike. I designed and 3D printed an adapter that mounts to the rear bike rack to hold the battery. You can lock the battery to the rack. You can also use the adapter as a...

I've got a ton of RYOBI 18V tools and batteries. When RYOBI came out with their 40V tools, I started making 18V to 40V adapters. Now that I have a couple of 40V batteries, I thought I'd make a 40V to 18V adapter. It looks like something out of Sci-Fi movie, but it works (At least for tools that...

People ask if you can use solar to charge your Rad Power eBike Batteries. The answer is YES!. I tried three MPPT Solar Boost Controllers and several folding solar panels. Here's what I found

I've made a bunch of different powerstations based on RYOBI batteries. This project uses the RYOBI 40V 3 -Port charger to make a configurable Powerstation using off-the-shelf components. The powerstation can still charge the batteries, but can be used to run 300/600/1500W Inverters and 30A...

Thanks. You need to have access to the T1 sensor if you want to charge the RYOBI batteries. The ones on Ebay don't have that. I have put my designs on Thingiverse and Prusa's free 3D printer model sites.

Back in 2009 I built a Bike Generator to help Elementary School kids better understand Energy and Light Bulbs. After touring the local Elementary Schools I donated it to the local Community College. They recently called me and asked if I wanted it back since it was no longer working. I thought...

For kicks and grins, I put together a test system using solar blocking diodes. Here are my results

Ryobi 18 and 40V tool batteries have 4 terminals on their connectors. The two outside ones are + and -. The two middle pins are temperature sensors (T1 & T2)

I figured out a hack to put RYOBI's 18V tool batteries into "Charge" model (1200ohm resistor between + and T1).... but their 40V batteries are different and seem to have a digital signal on the T1 terminal. Has anyone figured out how to read T1/T2? Or know how to put it into "charge" mode...

I was pretty disappointed with the new RYOBI 1800W Powerstation. It didn't come with MPPT Solar charging or even Pass-Thru charging. I was curious if this was a limitation of the 40V battery or just the Power Station. After some quick tests, I determined you could charge and use the battery at...

Thanks! RYOBI came out with that new 1800W Powerstation. I think they fell short. Especially because they don't have pass-thru charging. I just determined that the 40V battery is capable of pass-thru charging... I made a single battery Powerstation, but I'd like to combine multiple batteries.

Here is one of my 18V projects:

Ah that's right they are probably just using them is serial config.