Back-Up Power

[Jacquesvdj]

Hi All
I’m thinking of adding some load shedding essentials. What I want to do is get a: 20Ah lithium battery and a battery charger (12v). Then I want to add some 12v 10w spotlights. Here is my question: Do I connect this 12v lights straight to the terminals of the battery?

 

[DapperDanMan]

20Ah lithium battery

Tiny!

 

[Jacquesvdj]

Tiny!

I can also go for a 55ah gel battery, I only want to run 4x 10w floods for outside at the moment, and add a few 12v lights within the house down the line?

 

[kombi-man]

You're obviously new at this. So, in a nut-shell..
NO Lead Acid
NO Gel
ONLY Lithium
MINIMUM size of 100 Ah
Buy a Solar Panel, and a MPPT Solar Charge Controller.
Then connect the 12 volt bulbs to the 12 volt output on the charge controller.
Thats a start.

 

[garyc]

I can also go for a 55ah gel battery, I only want to run 4x 10w floods for outside at the moment, and add a few 12v lights within the house down the line?

The external solar flood lights work well and are low effort due to not having to sort out wiring.

 

[Jacquesvdj]

You're obviously new at this. So, in a nut-shell..
NO Lead Acid
NO Gel
ONLY Lithium
MINIMUM size of 100 Ah
Buy a Solar Panel, and a MPPT Solar Charge Controller.
Then connect the 12 volt bulbs to the 12 volt output on the charge controller.
Thats a start.

I read into this setup, I’m definitely leaning towards it thank you very much

 

[Pineapple Smurf]

I can also go for a 55ah gel battery, I only want to run 4x 10w floods for outside at the moment, and add a few 12v lights within the house down the line?

4 x 10w floodlights outside?
Sunset to sunrise?
Let's assume for 12hrs then
Each light will consume 10 watt hours of power per hour
So for 12 hours that is 10 x 12 = 120Wh
You have 4 lights
4 x 120Wh = 480Wh

Divide this by your 12v battery

You need 480 / 12 = 40 amps minimum battery

 

[Jacquesvdj]

4 x 10w floodlights outside?
Sunset to sunrise?
Let's assume for 12hrs then
Each light will consume 10 watt hours of power per hour
So for 12 hours that is 10 x 12 = 120Wh
You have 4 lights
4 x 120Wh = 480Wh

Dive this by your 12v battery

You need 480 / 12 = 40 amps minimum battery

This lights will only operational when there is load shedding or power failure…

 

[Pineapple Smurf]

This lights will only operational when there is load shedding or power failure…

Oh cool, then a smaller battery will work just fine
But I would still be prepared for grid failure
And often in winter in a bad storm the municipal grid fails in neighborhoods

 

[Jacquesvdj]

The external solar flood lights work well and are low effort due to not having to sort out wiring.

Not really an option, but was at first. The thing most of my lights are smart lights I want to do the same with these 12v lights.

 

[Jacquesvdj]

Oh cool, then a smaller battery will work just fine
But I would still be prepared for grid failure
And often in winter in a bad storm the municipal grid fails in neighborhoods

Very true…