Good charge control for low wattage panel for boat battery

[Flunkyboi]

I have small fishing skiff. It have a deep cycle trolling motor battery (sealed lead acid) that supplies all 12v power.

Last year i bought a cheap Harbor Freight solar panel. I mounted it to the cover of my battery box. The intial intent was to use thar 25w as a continual trickle charger.

I found it does work, but has zero voktage regulation. In full sun, with no load, that thing goes over 20v. 25w ÷ 12v is just over 2amps, max. Does anyone make a dink charge control for this small appliction?

 

[littleharbor2]

These little Morningstar controllers are pretty rock solid, impervious to the weather and fit your application perfectly so even if it had to be aboard your boat, they are robust enough to do the job.
https://www.morningstarcorp.com/products/sunlight/

 

[seneysolar]

These little Morningstar controllers are pretty rock solid, impervious to the weather and fit your application perfectly so even if it had to be aboard your boat, they are robust enough to do the job.
https://www.morningstarcorp.com/products/sunlight/

Theres a guy on ebay selling a bunch of the 10a charge controllers for $40. EBAY

 

[TM48]

If you want something that will last get a Victron 75/10. About $50.

 

[Flunkyboi]

Thanks for the replies.

 

[Flunkyboi]

Bought a cheap little 10a online. A Solperk brand 10a PWM. All looks OK and I think this measly 25w HF solar panel is actually trickling a little to the battery. That little unregulated panel (the reason for installing a CC) is slowly raising the battery voltage. I have a bright battery connection light and load output light, but cannot see any light from the micro panel. I will check the voltage and panel output light at noon tomorrow. That little panel faces straight up.

 

[Flunkyboi]

I know little of PWM controllers. Does it hurt these if you lose battery connection, like an MPPT?

The reason I ask is because I have it charging the battery using clips on the lead posts, like a regular battery charger.

 

[740GLE]

I know little of PWM controllers. Does it hurt these if you lose battery connection, like an MPPT?

The reason I ask is because I have it charging the battery using clips on the lead posts, like a regular battery charger.

A small 25w 12v panel won’t hurt it.

It’s when you have 100v panel array going to a PWM which you should never do anyways.

 

[outboard1196]

I know little of PWM controllers. Does it hurt these if you lose battery connection, like an MPPT?

The reason I ask is because I have it charging the battery using clips on the lead posts, like a regular battery charger.

I bought the morning star sun keeper to use with harbor fright 25w panels. It's rated to be outside unlike the ones listed above

 

[Rmart30]

You can get a waterproof outdoor mppt on amazon for about $45 I will probably buy one for my tractor.

 

[Flunkyboi]

You can get a waterproof outdoor mppt on amazon for about $45 I will probably buy one for my tractor.

This Solperk is waterproof.