I have these and will be buying more. I have 30 of UB 12350 35 ah batteries that are almost 8 years old now. They run 2-1500 watt tru-sine inverters and are filled by 21 harbor freight 15 w panels, also 8 years old and 8- 90 watt kyocera. With a&#65279; 6+ year old HY energy HY400 12 volt wind turbine, known now as a Windmax HY400 5 blade. The Universal Battery brand is tough and easy to find. The Amorphous panels from H F are not the best but charge a hour before and hour after the Mono panels do and they do charge ( 1.09 amps) in a full moon a few times for a brief moment,  In full sun they still work well, 19 amps when they were new, 14.8 amps now after 8 years. New style HF (topray) panel seem better than the old ones I have.UPDATE: All the HARBOR freight panels are now on a shed/RV parking building 1000 feet from my home, making power still and they have been replaced with 22 of the UL SOLAR branded 85 watt panels and new charge controllers. We replaced the batteries finally with East Penn Manufacturing Deep Cycle 6 volts, and bought 8 more of these for our shed on the other end of our property plus added 3 more cheapy harbor freight 15 watt panels and a cheap 30 amp controller and all is good still. The Kyocera panels are still up and kicking on the back of my shop going into the new system I designed. [See pictures of the panels and controller system I built]Wanna save ? Use soft copper plumbing - refrigeration tubing, type L to link your batteries. I have 3/8 OD inserted into 1/2 ID ( 5/8" OD) typle L soft copper pipe. Cut to length, bent to shape, hammered flat 2" of the ends, bent to dual 90 Degrees ( like little handles )  and drilled 5/16 holes used stainless bolts and brass washers to bolt up all the batteries. Slip 1 1/8" heater hose (black and red hose) over it to insulate "before" flattening ends cut hose 4 inches less than length you made in the copper or split it and slip over the tubes. This set up handles a 1500 amp hit easy, clean and saved me $400 bucks on cables for 30 batteries. Also made my 9'3" run to big 5000 watt HF inverter with it adding a 1/4" soft copper tube in the 3/8ths OD. I use it for 4 to 6 hrs a week of welding and cutting.Suggestion? Shop Amazon suppliers for these. They will warranty them better than a local dealer, lesson learned on that one in my case.****Helpful LEARNED facts: Never allow the voltage to drop to 10.7 volts, ever. That level is 80% D.O.D. (Depth of Discharge). When it drops to 11.4 you are at a safe but taxing 55% of D.O.D. and to make yours last as I have never let voltage get below 11.6 and you too may get 8 plus years out of your battery. I also hit mine with a 40 amp plug in battery charger 2 times a year till they get warm to stir them. I've owned Trojans, suretttes and Walmart (johnson controls) and NONE have the balls that 30 of these have (1050 hair frying amps) for my solar/wind home. Exide 6 volt- real good, Odyssey Deep cycle - High $ but really good. The UB 35 amp - So far, still kickin a$$. Your choice, I even have 6 of these grouped in 2 packs of 3 that for 4+ years have started my 1997 Ford diesel truck, cheaper than the batteries they told me I needed by $60.I am shopping now for 30 more because I doubt they will make it through the winter in Idaho. But, I thought that last year too!