The five most-asked buying decisions
Office solar buying decisions span funding, technology, sequencing, and accreditation. Below are deep comparisons for the five questions we get asked most often.
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Cash purchase vs PPA
Cash delivers 25-yr NPV £2.16m on £288k install; PPA delivers £1.4m zero-capex. Side-by-side decision framework for UK office solar 2026.
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Battery vs no-battery
Battery NPV-positive above 200kWp system + 800MWh consumption + 25p/kWh tariff. Worked example: £148k battery on 480kWp delivers £127k 15-yr
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Solar vs air-source heat pump
For offices on gas heating, both solar PV and ASHP retrofit are decarbonisation routes. Worked sequencing: solar first usually wins on NPV.
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MCS vs RECC
MCS = installer competence (mandatory for SEG). RECC = consumer protection. Quality installers hold both. What each means for your office so
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In-house vs outsourced O&M
In-house O&M cheaper for portfolios >2MW; outsourced wins on uptime for single-building installs. Cost + capability comparison for UK office
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