Grand Design Solitude ST310GK
System Schematic

Basic Parts List
- 4 - Battle Born 100 Ah 12V LiFePO4 Deep Cycle Battery
- Victron Energy MultiPlus II 12/3000/120 Inverter with Charger
- Victron Energy VE.Bus Smart Dongle with Bluetooth
- Victron Energy SmartSolar MPPT 150/100 Charge Controller with Bluetooth
- Victron Energy Lynx Distributor
- Victron Energy SmartShunt
- Victron Energy Cerbo GX Communication Center
- Victron Energy GX Touch 50
- Victron Energy GX Touch 50 Wall Mount
- Miscellaneous Victron Energy RJ45 UTP Network Cables
- Miscellaneous Victron VE.Direct Cables
- Miscellaneous Victron Energy 32 V MEGA-Fuse for 12 Volt and 24 Volt Systems
- 8 - Hightec 215 Watt 36 Cell 12 Volt Nominal Solar Panels
- 8 - Continuous Resources Tilt Mount Brackets with Tilt Bars
- AM Solar Roof Combiner Box with Strain Relief
- MC4 Male/Female Solar Panel Cable Connectors
- 75 Feet 10 AWG Black PV Wire
- 2 - Micro Air Easy Starts
- Atkinson Electronics GSCM Mini Generator Control Module
- Midnite Solar Baby Box Enclosure with DIN Rail
- Miscellaneous Midnite Solar MNEPV Series 150 V DIN Mount DC Breakers
- Blue Sea Systems HD-Series Heavy Duty On-Off Battery Switch
- 13.5 Feet of 4/0 Welding Cable – Red
- 13.5 Feet of 4/0 Welding Cable – Black
- 35.5 Feet of 4 AWG Welding Cable – Red
- 30.5 Feet of 4 AWG Welding Cable – Black
- 11 Feet of 2 AWG Welding Cable – Red
- 2.5 Feet of 2 AWG Welding Cable – Black
- 6 Feet of 6 AWG Bare Solid Copper Grounding Wire
- 4 Feet of Portable Cord Soow 6/4 6 AWG 4 Conductor
- Red and Black Dual Wall Shrink Tubing
- Various 4/0, 2 AWG, 4 AWG and 6 AWG Tinned Copper Lugs
- Positive and Negative Busbars
- Miscellaneous parts, sealants, breakers, and connectors
Installation Notes
This installation was completed in December of 2021. The owner of this 5th wheel contacted me after speaking with a previous customer of mine. When he contacted me, I had just completed an estimate for the same 5th wheel make/model/floorplan for another customer. This customer told me what he wished to accomplish with his RV system and it was very similar to what the previous customers wanted. After some discussions, I basically offered him a carbon copy of my previous design. The system design would be capable of providing power and conveniences while boondocking for extended periods. The customer accepted the design proposal and we moved forward. I ordered parts and we scheduled an installation date. While waiting for parts to arrive, the customer contacted me again and told me he wished to be able to tilt his solar panels when in use. I recommended a tilt mount system for the proposed solar panels and the customer accepted. Upon the installation appointment, the customer brought the 5th wheel to me and I began the installation process. I had just completed the twin system the week prior, so this installation process went fairly easily and quickly. I was able to shorten the overall installation time by half a day because of my experience on the previous duplicate installation.
This particular floor plan had lots of open space behind the basement wall, which made it pretty easy to install all the equipment out of sight and out of the way. The customer actually gained additional storage space in the generator compartment because the OEM batteries were removed from that area. This freed up that space for other items. The system was based around four Battleborn 100 amp hour batteries and a Victron Multiplus II inverter/charger. The Multiplus II was installed in line ahead of the main power panel and can power all electrical circuits in the trailer (within the capabilities of the inverter). All the components went in with no issues. There was plenty of room left over to allow for expansion of the battery bank in the future if desired as well. In fact I made the customer extra battery interconnect cables to add two more Battle Born batteries later. There is also room on the roof for additional solar if desired. This 5th wheel came from the factory with easy roof access to the middle of the basement storage compartment, making installing the solar panel wiring an easy task. Once the installation was complete, the customers returned to pick up the 5th wheel He was very happy with the final product and was looking forward to taking it out and using his new system.