This document introduces the functions and features of Morningstar Sunsaver models of solar system controllers, including specifications, installation instructions, operation instructions, testing and troubleshooting
The SunSaver™ photovoltaic controllers are series‑switching PWM charge controllers designed for 12 V or 24 V battery systems. They include features such as low‑voltage disconnect (LVD), sealed or flooded battery selection, and LED status indicators.
This manual covers safety instructions, mounting and wiring procedures, LED indicator meanings, operation tasks, testing with a power supply, and detailed troubleshooting steps. It also lists the electrical specifications for each model and provides wiring diagrams for proper installation.
| Maximum PV Voltage (V) | 25 V (12 V models) / 44 V (24 V models) |
|---|---|
| Rated PV Input (A) | 6.5 A – 20 A |
| Maximum Array Short‑Circuit Current (A) | 8.1 A – 25 A |
| Ambient Temperature Range (°C) | –40 °C to +60 °C |
| Weight | 8 oz (0.23 kg) |
| Maximum Wire Size per Terminal | #10 AWG (5.2 mm²) |
The green LED lights whenever sunlight is available and the controller is charging the battery.