top of page
deck-wood-brown-texture-planks-wall-floor-designing.webp

Your questions, my answers

Thousands of questions, answered by me. Explore them, or ask your own to get started.

marty-looking-right_edited.png

Recent questions

Are 24% panels harder to install or maintain?

No, 24% efficiency solar panels aren't harder to install or maintain than standard panels. They use the same installation process, weigh similar amounts, and require identical maintenance - cleaning every 2-3 years and annual visual inspections.

Are AC modules easier to install than traditional panels?

AC modules are significantly easier to install than traditional solar panels because they have built-in microinverters, reducing installation time by 20-30%, requiring less wiring, eliminating separate inverter boxes, and improving safety during installation.

Are AC modules safer than standard panels?

AC modules are generally safer than standard solar panels because they convert to lower 240V AC electricity at each panel, while standard panels carry dangerous 600-1000V DC current across your roof, creating higher electrocution and fire risks.

Are CPV panels suitable for homes?

CPV panels aren't suitable for UK homes due to our changeable weather and limited sunshine hours. They cost three to four times more than standard solar panels but work poorly in cloudy conditions, making traditional photovoltaic panels the better choice.

Are DC-DC inverters safe for home use in the UK?

Yes, DC-DC inverters are safe for UK home use when properly installed by qualified electricians and maintained regularly. They must comply with UK electrical safety regulations and British Standards, with professional installation costing £200-500.

Are DC-coupled systems more complicated to install?

DC-coupled battery systems are actually simpler to install than AC-coupled ones, with fewer components and connections needed. They're more efficient too, losing less energy during conversion. The main complexity comes when retrofitting existing solar panels, which might need a new hybrid inverter.

Are EV tariffs different from normal electricity plans?

EV tariffs offer time-of-use pricing with overnight rates as low as 7p per kWh versus standard 25-30p rates. They require smart meters and compatible chargers, potentially saving £400-600 annually for typical drivers who charge at home overnight.

Are LiFePO4 batteries safe to use in a home?

Yes, LiFePO4 batteries are among the safest battery types for home use. They resist thermal runaway, handle overcharging well, and have an excellent safety record when properly installed by certified professionals following manufacturer guidelines.

Are MCM panels more expensive than non-certified ones?

MCS-certified solar panels cost 10-20% more than non-certified alternatives, adding £600-1,200 to a typical £6,000 system. However, certified panels provide access to government incentives, insurance compliance, and better warranties, making them worthwhile for most UK homeowners.

Are NiCd batteries safe to use in a home setup?

NiCd batteries can be used safely at home with proper precautions, but they contain toxic cadmium and risk dangerous leaks. They're becoming obsolete, hard to replace, and require special disposal. Modern lithium-ion alternatives are safer and more practical.

Are PERC panels more efficient than standard ones?

PERC solar panels are more efficient than standard panels, typically delivering 1-3% better performance at 20-22% efficiency versus 18-20%. They cost £100-200 more per kW but generate more electricity, especially in UK's low-light conditions.

Are SG markings required for home solar systems?

SG markings aren't required for UK home solar systems. You need MCS certification instead, which is mandatory for government incentives like Smart Export Guarantee payments and ensures your system meets British safety and performance standards.

Are VAT exemptions available across the whole country?

VAT exemptions on renewable energy systems are available nationwide across the UK at 0% rate until March 2027. This covers solar panels, heat pumps, wind turbines, and battery storage including professional installation costs for residential properties.

Are air source heat pumps noisy?

Air source heat pumps produce 40-60 decibels at one metre distance, similar to a refrigerator or quiet conversation. UK regulations require units stay below 42 decibels at neighbouring properties, making them barely noticeable with proper installation.

Are air-to-air pumps noisy indoors or outdoors?

Air-to-air heat pumps produce 40-60 decibels, similar to normal conversation or a quiet dishwasher. Outdoor units hum like a fridge, while indoor units are barely noticeable. UK regulations limit outdoor noise to 42 decibels at neighboring properties.

Are all EV chargers compatible with all cars?

No, not all EV chargers work with every electric car. Compatibility depends on connector types - most UK EVs use Type 2 for AC charging and CCS for DC fast charging, but some older models use different connectors.

Are all new panels now made with half-cell technology?

No, not all new solar panels use half-cell technology, though it's becoming increasingly popular. Half-cell panels are mainly found in mid-range to premium models, while budget panels still use traditional full-cell design due to lower manufacturing costs.

Are all solar panels good for the environment?

Solar panels are good for the environment overall, cutting household carbon emissions by 1-2 tonnes annually. However, environmental impact varies based on manufacturing processes, durability, and recycling capabilities, with some panels being greener than others.

Are automation rules hard to set up?

No, automation rules aren't hard to set up. Modern smart energy devices use simple mobile apps with step-by-step guidance. Most people can easily create basic rules like heating schedules or timed plugs without technical expertise.

Are balcony solar panels safe in high winds?

Yes, balcony solar panels can be safe in high winds when properly installed with quality mounting systems engineered to European standards. These systems withstand winds up to 150 km/h, well above typical UK storm conditions, but require professional installation.

Are battery storage systems wall-mounted or floor-standing?

Most battery storage systems offer both wall-mounted and floor-standing options. Wall-mounted units save space and suit smaller properties, while floor-standing systems allow larger capacities and easier maintenance access.

Are bifacial panels more expensive to buy?

Bifacial solar panels cost 10% more than standard panels but can generate up to 30% more electricity by capturing light from both sides. For most UK homes with typical roof installations, the premium doesn't deliver proportional returns.

Are bifacial panels suitable for small rooftops?

Bifacial solar panels can work on small rooftops but aren't always worth the 10% cost premium. They're best with light-colored roofing and adequate mounting space, otherwise conventional panels often provide better value.

Are bifacial panels worth the extra cost?

Bifacial solar panels cost 10% more than standard panels but can generate up to 30% more electricity when installed over reflective surfaces like white gravel or light-colored roofs, making them worthwhile if your setup captures reflected light effectively.

Are bioethanol fireplaces safe to use in UK homes?

Bioethanol fireplaces can be safe in UK homes if you use them properly, but they need careful handling since the fuel is highly flammable. They give off real flames without needing a chimney, though you'll need good ventilation and they're pricey to run long-term.

Are biomass boilers a good alternative to oil or gas heating in the UK?

Biomass boilers can slash heating bills by 30-50% and are much greener than oil or gas, but they need loads of storage space and cost £8,000-£15,000 upfront. They work brilliantly for rural homes without mains gas, though you'll need to handle deliveries and regular maintenance yourself.

Are black panels more expensive?

Yes, black solar panels are more expensive than blue ones. Black monocrystalline panels cost £1-£1.50 per watt versus £0.90-£1 per watt for blue panels, but offer higher efficiency at 20-26% compared to 13-20%.

Are built-in fireplace inserts safe to use in UK homes?

Yes, built-in fireplace inserts are safe for UK homes when professionally installed and maintained. They're much safer than open fireplaces, containing flames and properly venting gases. Professional installation by certified engineers is legally required for gas and wood-burning models.

Are bypass diodes useful in areas with lots of trees?

Bypass diodes are traffic controllers in solar panels that reroute electricity around shaded areas. They prevent one shaded cell from reducing entire panel output by 50%, maintaining efficiency in tree-heavy installations by only losing power from actually shaded cells.

Are cables and accessories extra?

Yes, EV charger cables and accessories are usually extra costs. Charging cables cost £100-300, installation extras add £50-150, and total installation typically ranges from £1,500-3,000 including all components and labor.

Are draught-proofing products easy to fit yourself?

Yes, most draught-proofing is easy to DIY. Basic products like door strips, window seals, and chimney balloons require only household tools and take under an hour to install, costing £5-50 for materials.

Are ducted systems more efficient than ductless ones?

Ductless systems typically offer better efficiency than ducted systems because they deliver air directly to rooms without duct heat loss. Ducted systems can lose 20-30% of energy through poorly maintained ductwork, while ductless provides room-by-room control.

Are ductless systems easier to install?

Yes, ductless systems are significantly easier to install than traditional ducted systems. Installation takes just one to two days versus weeks for ducted systems, requiring only small wall holes and minimal disruption to your home.

Are efficiency ratings regulated or standardised?

No, EV charger efficiency ratings aren't regulated in the UK. The Public Charge Point Regulations 2023 focus on reliability and pricing transparency, but don't require manufacturers to meet efficiency standards or display efficiency labels like household appliances.

Are electric wall-mounted heaters cheaper to run than gas patio heaters?

Electric wall heaters typically cost 60-70p per hour to run, while gas patio heaters cost £1.50-4 per hour - making electric roughly three times cheaper. Electric heaters work better for smaller patios and need proper installation, whilst gas suits larger spaces but requires regular bottle changes.

Are ethical panels more expensive?

Yes, ethical solar panels typically cost 10-20% more than standard panels. In the UK, this adds around £550-£1,400 to a typical 4kW system, though some ethical brands price competitively with mainstream options.

Are fireplace inserts more efficient than traditional open fires?

Fireplace inserts boost efficiency from 10-20% up to 70%, turning wasteful open fires into proper heating systems. They cost £800-3,000 plus installation but burn half the wood for better heat output, comply with UK emission rules, and typically pay for themselves within 3-5 years.

Are fittings included in the installation price?

Yes, reputable UK solar installers typically include all necessary mounting fittings and hardware in their quoted installation prices. However, some installers may exclude certain components, so always ask for a detailed breakdown before signing any contracts.

Are flat roof mounts safe in strong winds?

Yes, flat roof solar mounts are safe in strong winds when properly designed and installed. UK ballasted systems withstand winds up to 100mph using weighted blocks, but require professional structural assessment and correct ballast calculations.

Are flexible panels as efficient as traditional ones?

No, flexible solar panels are not as efficient as traditional ones. Flexible panels achieve 10-18% efficiency while rigid panels reach 19-22%. However, flexible panels are lighter, portable, work on curved surfaces, and excel for boats, caravans, and temporary installations.

  • Page 1
bottom of page