Commercial · Solar PV + BESS
Namanve Logistics Warehouse
A roof that pays the rent it never used to.
- Location
- Namanve Industrial Park
- Scale
- 180 kWp + 120 kWh
- Commissioned
- 2024
- Rooftop array
- 180 kWpRooftop array
- Battery storage
- 120 kWhBattery storage
- Modelled payback
- 4.1 yrsModelled payback
- CO₂ avoided per year
- ~215 tCO₂ avoided per year
Figures are representative of work delivered in this sector and are rounded. Full project documentation available on request.
01 — The brief
What we walked into
A 180 kWp rooftop array with battery storage, designed around interval meter data to shave the demand peaks that dominated the site’s bill. Critical lines now ride through grid interruptions without waiting for a generator to start.
A distribution warehouse with a large, unshaded roof and a bill dominated by demand charges rather than consumption. Management assumed the answer was a bigger generator. The interval data said otherwise: the expensive problem was not outage duration but the demand peak created when compressors and dock equipment started together each morning.
02 — The approach
What we engineered
We modelled the load at interval resolution across a full quarter, which showed a pronounced morning peak and a broad, flat daytime base — close to an ideal solar profile. The array was sized to the base load and the battery to the peak, not the other way round. 180 kWp of tier-1 modules on ballasted mounting avoided roof penetrations on a membrane the client wanted untouched, with structural sign-off on the additional dead load. A 120 kWh lithium BESS handles peak shaving during the day and switches to ride-through duty on grid failure, so the packing lines never stop for the seconds a generator needs to start.
Engineering detail
- Full-quarter interval logging revealed demand charge, not outages, as the real cost
- Ballasted mounting — no penetrations on the client’s membrane roof
- Structural sign-off obtained for additional dead load
- Battery sized to the morning peak, array sized to the base load
- Peak shaving by day, ride-through on grid failure, same asset
03 — The result
What it delivers now
The demand charge fell materially in the first billing period, which was the single largest line on the bill and the one nobody had targeted. Solar now covers the majority of daytime consumption, and the battery has absorbed every grid interruption since commissioning without a production stoppage. Modelled payback is about four years — and because the value of each self-generated unit rises with the tariff, that number improves rather than degrades over the asset’s life.
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