Ferroamp Power Distribution Unit 8 SSO – DC distribution box for 8 Solar String Optimizers

The Ferroamp Power Distribution Unit 8 SSO is the DC distribution box (combiner box) for neatly and safely bundling multiple Solar String Optimisers (SSO) within a Ferroamp installation. Instead of separate fuse holders and a jumble of connections, you have one central unit with clear cabling, individual protection per channel and a main switch for safe maintenance.

Application

• For: 1 to 8 Ferroamp Solar String Optimisers (SSO)
• Function: DC distribution, protection and central switching to the DC grid
• Why handy: faster installation, better labelling, easier fault finding and easier expansion

Key specifications

• Nominal DC voltage: 1000 VDC
• Nominal DC current: 126 A
• Protection rating: IP65
• Impact resistance: IK10
• Ambient temperature: -25°C to +45°C

Connections and cable range

Inputs (SSO side)

• Cable inlet: 8 × M20
• PE per inlet: < 4 mm²
• L+ per inlet: 1.5-10 mm²
• L- per input: 1.5-10 mm²

Outputs (DC mains direction)

• Cable input: 1 × M25 and 1 × M32
• PE output: < 25 mm²
• L+ output: 10-50 mm²
• L- output: 10-50 mm²

Enclosure and mounting

• Dimensions (H × W × D): 400 × 380 × 150 mm
• Weight: 13 kg
• Material: cold-rolled steel (enclosure and door), galvanised steel (mounting plate)
• Colour: grey (RAL 7032)
• Finish: heat-hardened powder coating (structured finish)

Installation tips (Radiant green-style)

• Number your inputs 1-8 (SSO-1 to SSO-8). This saves so much time during commissioning and service.
• Stick to the cable cross-sections: incoming 1.5-10 mm² and outgoing 10-50 mm² (L+/L-).
• Use the right cable glands (M20 for SSO in, M25/M32 for out). This will ensure that IP65 really is IP65.
• Work DC safe: de-energise, lock where possible and always measure.
• Service area: mount it so that you can easily access fuses and switches later.

Standards

• EN 61439-1 and EN 61439-2