Although admittedly not common for off-grid solar, 36v/3-12v series battery systems are extremely common for marine trolling motor applications. I'm trying to figure out the most cost effective way to recharge (not just trickle/maintain) a 50ah system that will be used 2-3 hours then stored for several days at a remote dock without shore power. This typically equates to about a 25% discharge or 12.5ah/450Wh so it seems like a 100-300W solar panel would fit the bill. Available ready to go systems are sold with one 36v charge controller, which does not seem like the best way to charge the 3-12v cells. All 120V marine chargers for this application use individual 12 banks with individual cell monitoring and charging. Can you successfully parallel connect 3-12v charge controllers to a single solar panel ? I haven't been able to find any 36v charge controllers with 3-12v charge outputs either. Mounting a single 100-300W solar panel plus a control enclosure on a dock is a big enough hassle. Having to install three panels would be a huge pain. Any suggestions would be greatly appreciated