30W solar panel enough to maintain a 6S /8aH lithium battery bank?

[nzoomed]

Im wanting to build a battery bank that is solar powered to keep a reolink security camera going, i havent measured its power usage yet, but the power adapter it comes with is rated at 1A/12V so is 12W in total, would be drawing this much power 24/7
battery bank would be about 200W at 25V full capacity x 8aH (might be able to use 5aH 21700 cells to make it 10aH
The idea is that the battery only needs to keep the camera at night and allow a bit extra for low light, lets say the camera uses the full12W to run then thats about 280W per 24 hours, but about only 12 hours will be low light/dark every day.
a 30W panel should be able to charge the battery on a good sunny day I worked out and still have enough to run the camera at the same time.
The real question is now much i need to add for compensating a cloudy day?

 

[rjenkinsgb]

The long term average from a solar panel in the UK is around 8 - 9% of it's rated maximum power.

For a 30W panel, that means around 2.4 - 2.5W long term average (24/7 throughout the year).

Other countries will have different ratios, but for anywhere like here, you would likely need panel with a total rating of 200W or more to maintain the camera without any other power - plus batteries large enough to maintain it through several days of bad weather!

 

[nzoomed]

thats quite low, im assuming thats an average of its rated output over 24 hours?
Im in new zealand and have more daylight than the UK over the winter period.

 

[rjenkinsgb]

OK, a quick search shows around 16% for New Zealand (again, yearly 24/7 average); twice the UK output.

So around 100W of panel rating?

 

[nzoomed]

OK, a quick search shows around 16% for New Zealand (again, yearly 24/7 average); twice the UK output.

So around 100W of panel rating?

Yeah, that seems a bit more reasonable, I was hoping I could make the unit a bit smaller, but I'm thinking I could potentially simulate a cloudy day of operation by covering part of the panel perhaps?