Speaking of batteries...

Since Trojan moved smelting operations to Mexico I have been buying all East Penn batteries from Batteries Plus Bulbs. We monitor each cell's specific gravity with an optical specific gravity refractometer at our off grid cabin. Those measurements are documented and monitored for loss of capacity. I certainly like the ability to measure each cell voltage and specific gravity. The ability to add water or replace water that has evaporated is nice. Personally having twice the battery bank or solar is more important to me than mounting my batteries upside down.