Independent microgrid and energy resilience consultancy for commercial, public sector, and critical sites — combining solar, battery storage, backup generation, and intelligent controls into systems that deliver continuity.
Grid reliability in the UK is under increasing pressure — connection delays, capacity constraints, and the growing frequency of localised outages mean that organisations with critical operations can no longer assume uninterrupted supply. At the same time, the combination of solar PV, battery storage, and intelligent controls has made on-site energy independence genuinely viable for commercial and public sector sites.
A microgrid is not just a resilience measure. Designed well, it reduces energy costs, increases renewable self-consumption, provides grid flexibility, and future-proofs your energy infrastructure against a changing supply landscape.
Renmaker brings independent advice across the full scope — from initial feasibility through to system architecture, controls specification, and procurement — without being tied to any equipment supplier, integrator, or technology platform.
Vendor-neutral advice. We are not affiliated with any inverter manufacturer, battery supplier, controls vendor, or EPC contractor. Our role is to define what you need and help you procure it on the best terms — not to sell you a particular solution.
Microgrid projects are more complex than standalone solar or BESS installations. They require careful integration across generation, storage, controls, protection, and grid interface. We break the work into clear stages so you have decision points at each phase before committing further investment.
We analyse your site's demand profile, operational patterns, grid connection, and existing infrastructure to establish what a microgrid could realistically achieve — and what it would cost. We identify whether grid-tied, islanded, or hybrid operation makes most sense for your specific risk and commercial requirements.
We define how solar PV, battery storage, backup generation (diesel, HVO, or hydrogen), protection systems, and controls should be configured to meet your resilience and commercial objectives. Architecture is designed around your requirements — not around what a particular supplier wants to sell.
We model your critical load requirements, identify the minimum generation and storage capacity needed to maintain essential operations during a grid outage, and test the system design against realistic outage scenarios. The result is a resilience specification your operations team can rely on.
The controls layer is where most microgrid projects go wrong — either over-engineered and expensive, or under-specified and unreliable. We define control system requirements, communication architecture, and integration with existing BMS, SCADA, and energy management systems to a level that procurement can be based on.
Microgrids involve significant capital investment. We build the business case — capex, opex, savings, resilience value, grid flexibility revenue, and sensitivity analysis — in a format that finance committees can assess. We include downside scenarios, technology risk, and realistic assumptions rather than optimistic projections.
We prepare procurement specifications, support supplier evaluation, and provide independent oversight during delivery — keeping your interests at the centre of a process that involves multiple contractors, significant technical complexity, and real commercial risk.
Solar inverters, battery management systems, energy monitoring platforms, and SCADA-connected devices from certain manufacturers — particularly those manufactured in China — are configured by default to route operational data to overseas servers. This data can include site consumption patterns, grid connection topology, generation output, and in some cases remote access credentials for control systems.
For a commercial warehouse this may be an acceptable risk. For a hospital, a data centre, an emergency services facility, a defence supply chain site, or a government estate, it is a procurement and security issue that needs to be addressed at the specification stage — not discovered after installation.
We advise on hardware provenance, network segmentation, remote access controls, and data sovereignty requirements as a standard part of every microgrid and energy resilience engagement. If your organisation has security clearance requirements, data handling obligations, or procurement restrictions on hardware origin, we can structure the specification accordingly. Talk to us about your specific requirements.
Microgrids make most sense where the cost of an outage — operational, financial, reputational, or safety-related — is high enough to justify the investment in resilient infrastructure.
Hospitals, GP surgeries, ambulance stations, and emergency coordination centres where power failure has direct patient safety implications. Grid resilience and islanded backup design with clinical load prioritisation.
Facilities where uptime is contractually guaranteed and energy cost is a major operational variable. Microgrids providing resilience, peak demand management, and renewable generation to meet sustainability commitments.
Public sector sites with security classification, restricted procurement requirements, or data sovereignty obligations. Hardware provenance and network architecture are integral to the design, not an afterthought.
Sites where a power outage causes production loss, spoilage, equipment damage, or safety incidents. Resilience designed around minimum critical loads and fast islanding response times.
Sites with weak grid connections, high connection upgrade costs, or generation constraints where an islanded or hybrid microgrid is more cost-effective than grid reinforcement.
High-energy depots combining EV fleet charging, cold storage, and operational loads where peak demand management, solar self-consumption, and resilience all need to work together.
We start by understanding your operational requirements, resilience objectives, existing infrastructure, and commercial constraints. No charge — we need to understand the situation before we can scope the work usefully.
We assess your site, demand profile, and grid connection and produce a structured options review — what configurations are technically viable, what they would cost, and what they would deliver in resilience and commercial terms.
Working from the approved option, we develop the system architecture, component specification, controls requirements, and hardware security criteria to a level that supports procurement.
We build the investment case — capex, savings, resilience value, sensitivity analysis — and the supporting documentation needed for internal approval, board sign-off, or grant applications.
We prepare procurement documentation, support supplier evaluation, and provide independent oversight during delivery to ensure the installed system matches the specification and performs as intended.
Talk to us about microgrid feasibility, islanded operation, hardware security, or energy resilience planning. We'll be honest about what's viable and what it will take to deliver.