2008 rzr 800 battery light flashing

I have a 2008 RZR and we just got back from Windrock and did a little night riding. I rode all day without my headlights on and had no problem, but at night when I turned my headlights on the battery light would flash every 15-20 min and when we got close to the truck my whole gauge cluster went out except the speedometer and the back light. I recently hooked up a light bar and a winch and thought that was the problem, but I unhooked all of it and let it idle with the headlights on and the battery light began flashing after 25 min. I did some reading and saw where some people say it could be the voltage regulator, but if that was the case shouldn’t it do if the headlights are off too? I am thinking it’s my battery because it’s about a year old Walmart everstart. I am going to to try a new battery any thoughts on what the best one would be? The only other thing I plan to add are some speakers. I am going to try to get away with running one good battery because I rarely right at night and only occasionally use my winch, but would use the stereo often.
Any help is gretly appreciated!

2008 rzr 800 battery light flashing

I have a 2008 RZR and we just got back from Windrock and did a little night riding. I rode all day without my headlights on and had no problem, but at night when I turned my headlights on the battery light would flash every 15-20 min and when we got close to the truck my whole gauge cluster went out except the speedometer and the back light. I recently hooked up a light bar and a winch and thought that was the problem, but I unhooked all of it and let it idle with the headlights on and the battery light began flashing after 25 min. I did some reading and saw where some people say it could be the voltage regulator, but if that was the case shouldn’t it do if the headlights are off too? I am thinking it’s my battery because it’s about a year old Walmart everstart. I am going to to try a new battery any thoughts on what the best one would be? The only other thing I plan to add are some speakers. I am going to try to get away with running one good battery because I rarely right at night and only occasionally use my winch, but would use the stereo often.
Any help is gretly appreciated!