Sparrow Parts Manufaturer's links:

• Zivan NG3 Charger: http://www.zivan.it/ENG/index.html
• Xantrex E-Meter (now called a Link10): http://www.xantrex.com (look under products then accessories)
• Optima Batteries: http://www.optimabatteries.com/publish/optima/americas0/en/config/home.html