I have a 2010 Polaris EV that has just done 412 hrs on the 8 T1275 Trojan batteries, a good run I am told, however they have reached their use by date with three of them exhibiting cell collapse. Five of them remain OK with the hygrometer indicating half charge densities and 12.55 volts. SO I was in a quandary to replace just the three or change out the whole lot, which is VERY expensive here in Western Australia. Each T1275 battery retails for AUD$495.00 ($3960.00) OUCH!. So reading this form and others I was looking for an alternative and found a similar battery (deep cycle, 120Ahrs, AGM) of the same size called Vision (made in Vietnam) and decided to get the 8 required. This meant that all concerns about overcharging, undercharging, lead pollution, corrosion etc were eliminated. The total cost was ($2150.00) saving over $1810.00!!! There are rated for 10 years!! Upon removing the Trojans I discovered that the battery tie down rods were totally corroded (not there anymore at their base), the sub tray (below the plastic battery mould was corroded and all nuts gone. Even the buggy frame was exhibiting local corrosion! So I had to rebuild the two floor panels, subframe and make new stainless tie down rods - big job but all good now, everything works like a dream and the charger doesnt need to be adjusted for AGM. - Great - no more production, maintenance and I now have a trouble free future. BTW - I did do the charger bypass trick that results from too thin a wire😳😳😳.
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