Renogy has a calculator here:
only flaw I see is not including inverter efficiency.
Batteries don’t really like extreme cold or hot.
Buy an MPTT charge controller more efficient and better on the battery. Renogy has an ebay outlet, with pretty good discounts on clearance, open box and returns.
Gotta run that covers the basics.
Oh’ yeah and if its windy you could get one of those little windmill generators…..
From: Mark Croom <firstname.lastname@example.org>
Sent: Sunday, July 22, 2018 9:35 PM
To: CRTech <email@example.com>
Subject: [CRTech] Small Site Solar Equipment Advice Needed
I have a situation where I might need to power a Ubiquiti hop site with some type of solar/battery/inverter setup.
It's just two PoE radios, rated at 5.5W power consumption each (120V into PoE adapter).
I'm looking for something I can attach to the wood pole that supports the antennas, that is, to fit in a small cabinet that will attach to the pole. I'm OK with assembling this from parts rather than some kind of turn-key kit but the simplicity of a kit would be great because I'll be doing this as part of a big project and there's a lot on the plate while the project is in process.
I'd be interested in hearing from folks who might have done something like this -- it's much lower power requirement than a solar powered transmitter or translator site but it needs to be reliable (STL). I envision a deep cycle battery connected to the charger/inverter, or other battery technology that makes sense.
The panel would have a nice south exposure maybe fifteen feet up the pole, but the cabinet would be sheltered much of the day as it would go below the roof level of a very nearby adjacent building. That means not much roasting in the summer but we do get to -25F in the winter so if anybody has some real-world experience with battery technology for this I'd be grateful for the input.
Trenching power to this location would be very costly so I think doing our own solar might just be a great self-contained alternative.
Thanks for any real-world experience you can share.
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