I purchased an E1 which had a simple Yakima rack. I moved my solar panels from my previous camper (Starcraft Starflyer) and I managed to get a couple 100W panels mounted and actually still have room for the bikes. E1_Solar_Panels by EdZilla posted Jul 9, 2018 at 9:46 AM 2006 Coleman Evolution E1 by EdZilla posted Jul 9, 2018 at 9:46 AM My goal is to recharge and maintain my batteries when off grid, charge phones and kids (and Dad’s) electronics and to be able to run a few higher power A/C appliances (blender, power tools, etc) when the sun is hitting the panels. It’s not a complicated system, but i'm hoping it's adaptable. It all started when someone gifted me a camper ('94 Starcraft Starflyer) with minor electrical issues and got two free 100w panels. So I ordered cables and a charge controller and started hacking. The main idea is to maintain two group 24 marine batteries so they are always fully charged. My E1 didn’t have them so I wired up 12v and USB adapters around the cabin to run or charge most small electronics. I also added an inverter to run A/C appliances. Fuse block and inverter by EdZilla posted Jul 9, 2018 at 9:49 AM It all works well, but I haven’t boondocked for more than 3 days at a time so it’s not yet really battle tested. The solar panel cables are run from the panels on the roof through the shore power port to the charge controller (Grape Solar GS-PWM-40BT) which regulates charge to a marine battery in the battery box. Solar charge controller by EdZilla posted Jul 9, 2018 at 9:49 AM Although the GS-PWM-40BT has a built in control panel, it also has a Bluetooth interface so the solar charge system can be fully monitored even when the E1 is closed up. Because of the Bluetooth interface, I rarely need to look at the control panel, and so the controller can be mounted inside and out of the way. Grapesolar_charge_controller_app_screenshot by EdZilla posted Jul 9, 2018 at 10:03 AM The separable battery box is normally connected to the solar charge controller. Note the battery box has 2 USB, two 12v ports, external cable connections and a voltmeter. Also, with a group 24 marine battery inside it, there’s still room for an inverter or it’s own charge controller or jumper cables. The idea is that this battery is separable from the E1 and so it can be removed to power items outside of the camper but in “boondock” mode it’s connected in (balanced) parallel with the E1 primary battery. Both are maintained by the solar system when in “boondock” mode, else only the one in the battery box. Balancing batteries in parallel http://www.smartgauge.co.uk/batt_con.html I like having this battery separable from the E1 primary battery because it can be removed and used away from the E1. Another reason is that if the E1 is parked in the shade, you could carry a panel and the battery where it has better sun exposure and recharge it. battery box by EdZilla posted Jul 9, 2018 at 9:48 AM Since the E1 primary battery is normally maintained by either the tow vehicle or by shore power, so I've kept the two systems normally separate unless boondocking for extended periods of time.