Solar electric fence

[Nigel Goodwin]

OK, so it seems we pretty much agree on everything.

What about global warming?

 

[moty22]

There's a BIG difference between 'can' and 'should'

As I made clear previously, while using small low current panels at too high a voltage can't damage a battery, it's poor design and VERY wasteful.

Optimization is important to get the best performance at the lowest cost.

My point all along, is that unless your panels are particularly large, and your battery particularly small, then you don't need a regulator - and shouldn't have one (it's just wasting money and energy for no positive result).

I have a project on my website for charging a battery from solar cells: https://www.moty22.co.uk/charger.php
It is a step up switcher and the idea is to be able to charge the battery even on cloudy day when the voltage of the cells drops to 1V.

 

[mirel]

What about global warming?

Last year we had 2 days of global warming.

I have a project on my website for charging a battery from solar cells: https://www.moty22.co.uk/charger.php
It is a step up switcher and the idea is to be able to charge the battery even on cloudy day when the voltage of the cells drops to 1V.

I bought 20x25 cm solar panel for charging car battery. On sunny day no load voltage is 18V and connected to a 6V battery via ammeter the current is 35mA, this is good for me. On cloudy day the voltage is only 3V and when I connect the output to ground with ammeter the current is 3mA. Nigel Goodwin and crutschow were too optimists, moty22 was right when he said 2% output.

I want to try moty22 circuit https://www.moty22.co.uk/charger.php but it is with too many components, can you please suggest better circuit.