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Technical guide

Community Solar Microgrid: NEUTRON Protection Scope at Baaloul

The Baaloul community solar microgrid brings reliable electricity to a rural Lebanese village through on-site PV and storage. NEUTRON supplied the DC protection on the array side and the residual-current protection on the AC side, with the battery and inverter integrated by the operator.

NEUTRON Engineering TeamUpdated September 16, 20264 min readTechnical application guidance
Generic Lebanese village rooftops with solar panels around a civic courtyard and a closed electrical enclosure
Fig. 0 — Village-scale solar connects local generation with everyday community electricity needs.

Key takeaways

  • The DC-plus-AC protection approach removed shock-risk gaps and kept village loads stable through humid and dusty seasons.
  • Treat headline ratings as an engineering input, then confirm the final configuration against the project drawings and applicable local requirements.
  • Keep the approved component list, critical interfaces and required test or document deliverables visible before production begins.

1. Rural community supply

A village microgrid pairs a PV array with storage and an inverter feeding local loads such as homes, shops, lighting and a water pump. Protection must be safe and serviceable locally.

2. DC side protection

  • A DC isolation switch at the array combiner for safe maintenance.
  • gPV fuses protecting each string against short circuit and reverse current.
  • A DC-rated SPD where lightning exposure is significant.
Frontal DC combiner with a rotary control fuse holders and a surge protection module behind protective covers
Fig. 1 — Isolation, fuse protection and surge protection perform different jobs on the array side of a microgrid.

3. AC side: Type B RCBO

On the AC distribution board NEUTRON installed Type B RCBO units. Because the inverter can present smooth DC, a Type B device senses AC, pulsating DC and smooth DC, closing the shock-protection gap left by a Type A device.

Front view of a generic AC distribution enclosure with an open outer door and protected modular device faces
Fig. 2 — Accessible AC protection equipment supports routine inspection and local maintenance.

4. Nuisance trip avoidance

  • Correct Type B threshold sizing.
  • Clean array earthing to avoid parasitic leakage.
  • No mixed neutral-earth loops in the AC board.

5. Outcome

The DC-plus-AC protection approach removed shock-risk gaps and kept village loads stable through humid and dusty seasons.

Project paths

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Engineering boundary

Final ratings, coordination, installation and applicable local requirements must be verified against current standards, manufacturer documentation and the approved project design.

Frequently asked questions

Why Type B RCD for a community microgrid?

The inverter can inject smooth DC that a Type A RCD cannot detect; Type B senses AC, pulsating DC and smooth DC.

What causes microgrid RCBO nuisance trips?

Humid mornings, array parasitic capacitance and mixed neutral-earth loops; correct sizing and clean earthing resolve most.

What can one microgrid serve?

Depending on array and storage size, it can power local homes, shops, lighting and a water pump for a village cluster.

Which NEUTRON products fit?

DC isolator plus gPV fuse combiners, Type B RCBO or RCCB, coordinated DC SPD and a compact low-voltage distribution assembly.

Review the DC and AC protection boundary.

Share the array, inverter and local-load requirements for a coordinated community microgrid review.

Discuss a project
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NEUTRON Engineering TeamPower distribution and new-energy equipment for project-based export supply.

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Technical review note

Published from the approved Period 12 source package; project, technical and standards statements are retained from the supplied publication content.