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Most Common Field Installation Errors (Solar Hybrid / Inverter / LFP Battery Storage)
Concise, field-focused, real-world top mistakes:
1. PV Array Errors
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PV positive / negative polarity reversed
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Mismatched PV string length (different number of panels per string)
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Exceeding inverter max DC open-circuit voltage (too many panels in series)
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Poorly crimped DC connectors, loose terminals causing overheating
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PV cables undersized, leading to high voltage drop and power loss
2. AC & Grid Wiring Errors
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Live / Neutral reversed
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Incorrect 3-phase phase sequence (inverter won’t sync to grid)
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CT clamp fitted backwards → wrong power flow, no PV/grid charging
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Undersized AC cables, loose lugs, burnt connections
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Missing or improper earthing
3. Battery Installation Errors
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Battery positive/negative reversed wiring
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Poor ventilation, batteries installed in direct sunlight or enclosed hot spaces
4. Communication CAN Errors
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CAN-H and CAN-L swapped
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Missing or wrong 120Ω termination resistor
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Communication cable shield grounded at both ends (causes interference)
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Long unshielded communication wires running next to high-power cables
5. Inverter & Mounting Errors
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Inverter mounted with no ventilation gap, overheating and power derating
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Installed in damp, closed, or direct sun exposed areas
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Wrong country/grid code selected → grid lockout
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DC/AC breakers incorrectly rated or left off during commissioning
6. System Configuration & Commissioning Errors
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Time schedule wrong, preventing charging from PV or grid
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Multiple parallel inverters with duplicate communication addresses
7. General Civil & Safety Errors
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Cable routing unprotected, no trunking or cable ties
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Waterproof glands not sealed → water ingress into inverters/boxes
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No surge protection / lightning protection installed
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PV/AC cables run parallel without separation, causing EMI interference
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