SolarEdge Power Optimizer S650A
The SolarEdge S650A is an S-Series power optimiser for residential rooftops and
shorter strings. You get panel-level MPPT for maximum kWh, plus
Sense Connect (temperature monitoring at the connector level) and SafeDC™
(automatic voltage reduction on switch-off). Compact, quiet and quick to mount with one bolt-
exactly what you want on small or complex roof surfaces.
Short strings possible
Design easier on small roof surfaces; from approx. 10 optimisers per string (3-phase Home).
Sense Connect
Detects abnormal connector temperatures and prevents arcing.
SafeDC™ safety
Automatically ~1 V per optimiser in case of shutdown or grid failure.
99.5% efficiency
Panel-level MPPT minimises mismatch and shade losses.
Core specifications (S650A)
| Rated PV input power | 650 W (modules with max. +5% tolerance allowed) |
| MPPT range | 12.5 – 80 V – Max. Voc per input: 80 V |
| Max. Isc (module) | 15 A |
| Max. output | 15 A – Max. output voltage: 110 V |
| Efficiency | up to 99.5% (weighted approx. 98.6%) |
| System voltage | up to 1000 V DC |
| Protection | IP68 – operating temp. -40…+85 °C |
| Cables & connection | MC4-compatible; input 0.1 m – output: (+) ~2.3 m / (-) 0.1 m |
| Dimensions / weight | approx. 129 × 165 × 45 mm / ~0.79 kg |
Design & compatibility
- Inverters: SolarEdge Home (3-phase) and recent 1-/3-phase models with S-Series support.
- String length: typically min 10 and max 38 S650A per string (depending on inverter/grid conditions).
- Do not mix: do not combine with other optimiser types in the same string/inverter.
- Orientation: multiple roof areas in one string are possible within SolarEdge rules; design for frost-Voc and thermal margins.
Installation tips (String green)
- Installation – one bolt on frame/rail; leave space for ventilation under panel.
- Connectors – snap MC4 to full “click”, perform pull test; check polarity and insulation resistance.
- Cabling – keep bend radii; route longer plus lead neatly to next module.
- Commissioning – follow SolarEdge procedure; check panel mapping and Sense-Connect notifications.
When to choose the S650A?
- You have small/segmented roof areas and want short strings.
- You want panel-level security (SafeDC™) and predictive maintenance (Sense Connect).
- You’re looking for high yield with simple, quick installation.