Installation

Special Instructions for 2020+ Winnebago Navion/View/Era or any RV's with Mastervolt Chargemate

The Mastervolt Chargemate is a current limiting battery combiner, installed in many 2020+ Winnebago Navion/View/Era (Mercedes chassis) motorhomes. The Mastervolt is under the passenger seat and is a convenient location to install House2Start.

June 23, 2025 Update:
Now available! House2Start Gen2b, which is compatible with the Mastervolt Chargemate. When installing House2Start with a Mastervolt an external diode between House2Start and Mastervolt is required. The external diode is included with every House2Start module, and is only required when installing to a Mastervolt.

The Mastervolt Chargemate is located under the passenger seat.

What Jumper setting should I use?

House2Start Charge Cycle Example

This example is for an AGM house battery & House2Start configured with jumper setting B. The turn on (rising) voltage is 13.1V (dashed horizontal purple line) and the turn off (falling) voltage is 12.8V (dashed horizontal green line).

1. Before the sun rises, the starter battery (orange) is slightly discharged at 12.5V, and the AGM house (blue) also discharged at 12.6V.

2. House2Start charger is OFF.

3. Around 6:30AM the solar charger activates and begins to charge the house battery.

4. At 7:12 AM (purple UP arrow) the house voltage (blue) rises above the 13.1V turn on threshold, which actives the H2S charger output.

5. H2S is charging the starter battery, which raises the voltage (orange).

6. 8:30-9AM the house solar charger is in absorption mode and the AGM house is held at 14.5V.

7. 9AM house solar charger switches from absorption to float charge (13.5V).

8. 10AM House2Start has reached absorption mode and the starter battery held at 14.5V.

9. 10:30AM House2Start absorption mode finished and switches to float mode for starter battery (13.5V).

10. 3:00PM house solar charger turns off and house battery voltage begins to decrease.

11. 3:36PM (green down arrow) house battery voltage falls below the 12.8V turn off threshold, which de-activates the House2Start charger output.

12. 4:00PM Starter battery voltage equalizes at ~12.8V, indicating it is fully charged.