Solar Powered OPUS BT-C3100

solar_18650

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Apr 4, 2018
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For anyone who is interested, Ive been using my OPUS charger with a regulated DC-DC 12V 3A (max) car adapter, which allows me to run it directly from my solar setup.

Unfortunately I cant give any links to the exact product, as I purchased it from Maplin (in the UK) which is shutting down and clearing out stock at reduced prices. They no longer run their website, so I can only share a picture of the adapter Im using.

At the moment Ive got a 70Ah 12V SLA battery hooked up to a 100W 12V solar panel, being controlled by a Victron 75/15 MPPT charge controller.

Im planning on changing this system to a 7S10P (24V) 18650 setup (using new cells) - eventually. I should be picking up some more solarpanels in a little while.Just trying to pin down the best supplier for cells and system to connect them together (Im trying to avoid soldering).

Anyway, I thought this was a good way to charge/test cells using solar power.

My main aim is a small setup purely for powering/charging tech devices (laptops/iPads/phones etc) - which is mainly what Im doing with my SLA battery at the moment.

Ill probably start a new thread for my plans in the appropriate area here, but just wanted to share this first. Hopefully some of you may find it useful or interesting?!

The adapter Im using to power the OPUS is a regulated switchable adapter, which can go from 1.5V up to 12V with a maximum current of 3A. Itll probably be handy for poweringother devices too (it comes with various different DC plugs for different sizes).

Avoiding DC-AC-DC is my main aim - Im just trying to stick to DC-DC adapters which seems to make more sense when powering/charging devices from batteries.

Please ignore the mess in the photo. :blush:

image_utkcjg.jpg
 
Extremely smart.

As you get into building bigger and bigger battery packs, it starts to become very costly to charge the cells.
 
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