Expert Witness Capability

LHW Partnership LLP has been involved with the engineering aspects the provison expert advice in  Solar PV, Battery Storage, Wind, Renewable heating systems and high voltage engineering systems since 1985. This expertise comes from continual engineering experience in Power Engineering/Renewable Energy systems since 1985/1991 respectively, from a mqnufacturing, construction, consultative and  innvovation prespective.


The accumulation of technical knowledge over these years provided an immense amount of learned expertise. This knowledge supplemented by formal Expert Witness training allows LHW Partnership to act in the role of an Expert Witness.Fully trained and supported by Chartered Engineer status and Professional Indemnity Insurance, accredited by The Academy of Experts and recommended by the IET where the Founding partner is an IET  Presidents Listed Engineer considered qualified to act as an Expert Witness. 


Since 2015, LHW partnership LLP has undertaken over a hundred Expert Witness assignments for both Civil and Criminal cases and been cross examined in court apearance and undertaken this work both in the UK and as far away as Middle East and Australia  for law firms, private clients and UK Trading Standards. 



The duty of an Expert Witness

The duty of an expert witness is to help the court to achieve the overriding objective by giving opinion which is objective and unbiased, in relation to matters within their expertise.


This opinion based on eperience can help Courts resolve disputes both Civil and Criminal where particular expertise is required. Typically at least 10-15 years' experience in a specialty may provide the necessary background knowledge to become an expert witness.

Areas of Expertise

Vocational training provided by our team of experts

Solar PV / Wind

30 years Wind and Solar Engineering Experience

Heat Pump Technology

16 years ground and air source heat pump experience

Energy Storage

20 years PV and battery engneering experience

Recent Expert Witness Assignments

2020 Joint Expert - Ground Mount PV Installaton

Engaged as joint expert to pragmatically  investigate a PV system performance issue on a 200kWp PV installation in Cornwall. The report findings were accepted by both parties and the dispute resolved out of court

2019 Claimant Expert - Rooftop PV Installation

Engaged as expert by claimant to investigate a 200 kWp rooftop PV installation dispute in Lampeter, the report findings were accepted and the dispute was resolved out of court

2018 Joint Expert - Rooftop PV Installation

Engaged as Joint Expert to provide report to resolve a dispute on PV system near Truro. The dispute was settled without court proceedings.

2020/21Claimant Expert - 3 no PV Farms

Engaged as claimant expert to resolve a yield modelling dispute on 150MWp PV farm portfolio in Australia.

2020 Defence Expert - PV Farm portfolio

Engaged by Defendant to resolve a FAC financial claim on 20 no 5MWp PV farms, based on system performance model inaccuracies from Technical Advisor

2021 Claimant Expert - PV/Battery/GSHP project

Engaged to invstigate battery system technical and commercial performance dispute

2022 Joint Expert ASHP Performance

LHW prepared a Joint Expert Witness report on an ASHP installation performance installed in 2017

2022 GSHP - Expert Report PV System

Expert performance investigation and reort on block of flats with Pv & GSHP

2023 PV Farm Expert Review

Investigation, review  and Expert report on 1.2 GWp PV farm in UAE 

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