Frequently Asked Questions

Battery storage allows you to store excess electricity generated by your solar panels during the day, rather than exporting it back to the grid. You can then use this stored energy during peak hours, at night, or on cloudy days, significantly increasing your self-consumption and reducing reliance on grid electricity.

Battery storage systems typically come with warranties ranging from 5 to 15 years, often guaranteeing a certain number of charge/discharge cycles. The lifespan depends on usage patterns, temperature, and the specific battery technology. Lithium Iron Phosphate (LFP) batteries generally have the longest cycle life.

Yes. A standalone battery system can be charged directly from the grid during cheap off-peak hours (for example, using tariffs like Octopus Go or Intelligent Octopus), then discharge during peak pricing hours. This can significantly reduce your electricity bills without needing solar panels.

DC-coupled systems connect directly to solar panels and are more efficient (energy is only converted once), but require a compatible inverter. AC-coupled systems sit on the AC side of your electrics, making them compatible with any existing solar system or grid-only use. We advise which is right for you during your consultation.

Having a home EV charger provides unmatched convenience, allowing you to charge your electric vehicle overnight or whenever it's parked. It's often more cost-effective than public charging, especially when combined with off-peak electricity tariffs or solar PV.

Charging times vary greatly depending on the EV's battery size, the charger's power output, and the car's onboard charger capacity. A 7.4kW home charger can typically add around 25–30 miles of range per hour of charging. A full charge on most EVs overnight is easily achievable.

Most homes are suitable for EV charger installation. The key requirements are a suitable off-street parking space and adequate electrical supply. Our qualified electricians will assess your property and advise on the best solution. In some cases, a consumer unit upgrade may be needed first.

Yes — this is one of the most popular combinations. Smart chargers like the myenergi Zappi can detect when excess solar is being generated and divert it directly to your EV, giving you genuinely free driving. Combined with battery storage, you can maximise how much of your own generation you use.

An Electrical Installation Condition Report (EICR) is a thorough inspection of your property's electrical systems to ensure they are safe and comply with current regulations. It's recommended for owner-occupiers around every 10 years. For privately rented homes in England, landlords are legally required to have an EICR carried out at least every 5 years (or sooner if the report specifies); a valid, in-date certificate carries over to a new tenancy, so you don't necessarily need a fresh report for every new tenant.

Signs that your consumer unit (fuse board) may need upgrading include: it uses older rewireable fuses instead of circuit breakers, it doesn't have RCD protection, you're frequently tripping circuits, or you want to add high-demand appliances like an EV charger or electric shower. We can assess and advise.

Yes — GM Electrical Services is both a NICEIC Approved Contractor and a NICEIC Domestic Installer. This means all our electrical work is independently assessed and certified to the highest safety standards. You receive a Certificate of Compliance for all notifiable works.

Please contact us directly by phone on 07958 734613 to discuss urgent electrical requirements. We will do our best to accommodate emergency situations for existing and new customers across Preston, Lancashire, and the wider North West area.