Solar for care settings that never switch off

Most commercial buildings empty at some point. A care home does not. Heating, hot water, laundry, catering, lighting, call systems, lifts and increasingly air conditioning run continuously, at weekends and through the summer, and the demand curve is comparatively flat.

That flatness is the point. Where an office exports most of its weekend generation, a care home consumes almost everything an appropriately sized array produces at the moment it produces it. A unit consumed on site displaces electricity at your own unit rate, whereas an exported unit earns a small fraction of it, so a high self consumption profile is worth several times more per unit generated.

Laundry and catering reinforce it. Both are largely daytime activities, both are electrically intensive, and in many homes laundry runs in blocks that can be scheduled towards the middle of the day at no operational cost.

Older homes on gas heating have a relatively modest electrical load, which caps the array size that can be usefully absorbed. That picture changes as heating and hot water move to heat pumps.

A heat pump shifts a large part of the site's energy demand from gas to electricity, raising annual consumption substantially and increasing the array a building can absorb without exporting. It also introduces a winter peak that solar cannot serve, so the two should be assessed together rather than sequentially, with an eye on whether the incoming supply has the capacity for both.

Hot water is worth separate attention. Care settings use a great deal of it, storage cylinders can absorb surplus generation during the middle of the day, and diverting surplus to hot water is one of the cheapest ways to lift self consumption where a battery cannot be justified.

This constraint outweighs almost everything technical. Residents may be frail, some living with dementia, and disruption is not merely inconvenient but can be genuinely harmful. Access routes, scaffolding positions, delivery times and noisy activity all need agreeing with the home manager before a date is fixed, not on arrival.

Contractor conduct matters accordingly. Enhanced disclosure checks for anyone working in resident areas, infection control requirements observed, fire escape routes kept clear at all times, and a clear point of contact for the manager throughout. A vetted installer with care sector experience will already work this way, and it is one of the things we look for when matching a home.

The practical reassurance is that the array is installed from outside. The only internal work is at the electrical intake, and the single planned supply interruption is short and scheduled with the home around meals, medication rounds and resident routines.

There is a common misunderstanding worth correcting. A standard solar installation does not keep the building running in a power cut. It disconnects automatically when the grid supply is lost, as the connection standards require, so that it cannot energise a network that engineers may be working on.

Backup power for a care setting is a separate design decision. It requires either a generator or a battery with an islanding capable inverter and a properly configured changeover arrangement, and the critical circuits, which typically means call systems, lighting, lifts, hoists and any resident equipment, have to be identified and separated.

That is achievable and it is sometimes the strongest reason a home invests, but it must be specified at the outset. Adding islanding capability to a system that was not designed for it is considerably more expensive than including it from the start.

The sector's financial pressure is real and capital budgets are frequently the binding constraint rather than the technical case. Where outright purchase is difficult, the options that appear are asset finance and lease arrangements, or a third party funded structure where a provider owns the array and the home buys the power at a rate below the import price.

We are not a lender and we do not sell finance, but we can make sure the installer we match you with presents the funded routes honestly alongside the purchase case, including what the total cost over the term actually is rather than only the monthly figure.

Groups with several homes are usually better served by screening the portfolio first, ranking homes by roof condition, consumption and remaining lease or freehold position, and building the strongest sites first. NRG Solar does not install. We assess, we produce indicative figures from your own spend and roof outline, and we introduce one vetted installer working in your area.