Indra Smart PRO vs Simpson & Partners Home 7
The Indra Smart PRO wins on more affordable, while the Simpson & Partners Home 7 excels at higher rated, longer warranty, three-phase support.
Quick Stats
Full Specs Comparison
| Specification | Indra Smart PRO | Simpson & Partners Home 7 |
|---|---|---|
| Max Power Output | 7.4kW (single-phase only) | 7kW (single-phase) / 22kW (three-phase) |
| Cable Length | 6 metres | 5 metres (tethered version) |
| Connector | Type 2 (tethered or untethered) | Type 2 (tethered or untethered) |
| Connectivity | Wi-Fi, Bluetooth | Wi-Fi |
| Dimensions | 340mm × 240mm × 115mm | 350mm × 200mm × 110mm |
| Weight | ~5.0 kg | ~5.5 kg |
| IP Rating | IP54 (weatherproof) | IP54 (weatherproof) |
| Certification | OLEV/OZEV approved | OLEV/OZEV approved |
Price & Value
The Indra Smart PRO is £50 cheaper at £599 compared to the Simpson & Partners Home 7 at £649.
When you factor in professional installation (typically £400–£600), the total installed cost for the Indra Smart PRO is approximately £999–£1199, while the Simpson & Partners Home 7 comes in at around £1049–£1249. Fully installed, the Indra Smart PRO remains the more affordable option.
If you're eligible for the OZEV grant (available to renters and flat owners), you can claim £350 off the installation cost. That would bring the effective unit-plus-install price down to roughly £649–£849 for the Indra Smart PRO and £699–£899 for the Simpson & Partners Home 7. Both chargers are OZEV-approved, so eligibility depends on your living situation rather than the charger itself.
Looking at overall value, the Indra Smart PRO offers a compelling combination of price and features at £599. The Simpson & Partners Home 7 at £649 may still be the better buy if its specific feature set — such as s&p app — is important for your setup. The best value depends on which features you'll actually use day-to-day.
Power & Charging Speed
The Simpson & Partners Home 7 (7kW / 22kW) supports three-phase charging at up to 22kW, while the Indra Smart PRO is single-phase only at 7.4kW. On the standard UK single-phase supply (95% of homes), both charge at roughly the same speed. Three-phase is only relevant if your property has a three-phase electrical supply.
On a standard UK single-phase supply, both will charge a Tesla Model 3 Long Range (75kWh battery) from 20% to 80% in approximately 5–6 hours overnight. Even a Tesla Model Y with its larger battery completes a typical daily top-up well within an overnight window. For the vast majority of UK Tesla owners, single-phase 7kW charging is more than sufficient — you'll wake up to a full battery every morning.
Cable length is an often-overlooked consideration. The Indra Smart PRO comes with a 6 metres cable, while the Simpson & Partners Home 7 has a 5 metres (tethered version) cable. A longer cable gives you more flexibility for driveway positioning — particularly useful if your charger is mounted on a side wall but your Tesla's charge port is on the rear left. Measure your likely cable run before buying to ensure the cable reaches comfortably without being fully stretched.
For most Tesla owners who plug in when they get home, both chargers provide more than enough power for a full overnight charge. The real-world difference between 7kW and 7.4kW is negligible — roughly 20 minutes over a full charge cycle. Unless you have a three-phase supply and regularly need rapid top-ups during the day, charging speed should not be the deciding factor between these two chargers.
Smart Features
The Indra Smart PRO offers: Indra app, Smart tariff integration, Solar mode (CT clamp included), Dynamic load balancing, Surge protection (SPD) included, RFID lock. The Simpson & Partners Home 7 offers: S&P app, Smart tariff support, Scheduled charging, Solar compatible, Energy monitoring, Wi-Fi connected.
Breaking these down by category: for connectivity, the Indra Smart PRO uses its companion app, while the Simpson & Partners Home 7 uses Wi-Fi connected. For energy management, the Indra Smart PRO provides Dynamic load balancing, compared to the Simpson & Partners Home 7's Energy monitoring. Solar and scheduling features are covered in the dedicated sections below.
The most meaningful differentiators: the Indra Smart PRO uniquely offers Indra app, Smart tariff integration, Solar mode (CT clamp included), Dynamic load balancing, Surge protection (SPD) included, RFID lock, while the Simpson & Partners Home 7 exclusively provides S&P app, Smart tariff support, Scheduled charging, Solar compatible, Energy monitoring, Wi-Fi connected. These unique features often determine which charger is the better fit — if a feature on one charger's exclusive list is a must-have for you, that should heavily influence your decision.
The app experience matters as much as the feature list — you'll use it daily. The Indra app provides standard charging management features. The Simpson & Partners app provides standard charging management features. Both apps are available on iOS and Android, but user reviews suggest the day-to-day experience can vary significantly between brands.
Solar Compatibility
Both the Indra Smart PRO and Simpson & Partners Home 7 support solar integration, allowing you to charge your Tesla using surplus solar energy rather than drawing from the grid. The implementation and sophistication of solar diversion differs between the two, which can significantly affect how much free charging you actually get.
The Indra Smart PRO supports solar diversion through its energy management system. The Simpson & Partners Home 7 supports solar diversion through its energy management system. The key difference is how precisely each charger tracks surplus generation — CT clamp-based systems typically offer more responsive diversion than those relying on smart meter data, which can have a slight delay.
For home battery pairing, the Indra Smart PRO can work alongside a home battery system, though the integration may require additional configuration. The Simpson & Partners Home 7 can work alongside a home battery system, though the integration may require additional configuration. A home battery lets you store daytime solar surplus and charge your EV overnight at zero cost — effectively eliminating the limitation of only being able to solar-charge while the sun is shining.
A typical 4kW solar array in the UK can provide approximately 1,400–1,700 kWh of free EV charging per year, worth £390–£475 at standard electricity rates (around 28p/kWh). For context, the average UK Tesla owner drives around 8,000 miles per year, requiring roughly 2,400 kWh — so solar could cover 60–70% of your annual charging needs. Over the charger's lifetime, solar diversion can save thousands of pounds and significantly reduce your carbon footprint.
Smart Tariff Support
Both the Indra Smart PRO and Simpson & Partners Home 7 support smart energy tariffs, enabling automated off-peak charging at significantly reduced rates. This is one of the most impactful ways to cut your EV running costs, potentially saving hundreds of pounds per year compared to charging on a standard tariff.
The Indra Smart PRO supports smart tariff scheduling with popular EV tariffs including Octopus Go (~8.5p/kWh) and similar time-of-use plans. The Simpson & Partners Home 7 supports smart tariff scheduling with popular EV tariffs including Octopus Go (~8.5p/kWh) and similar time-of-use plans. The most popular EV tariffs in the UK include Octopus Intelligent Go (~7p/kWh), Octopus Go (~8.5p/kWh), OVO Charge Anytime (~14p/kWh), and British Gas EV Power+ (~7.9p/kWh). Not all chargers work with all tariffs, so check compatibility with your specific provider before buying.
The depth of integration matters. The Indra Smart PRO supports scheduled charging aligned to off-peak windows, though it may not communicate directly with the energy provider. The Simpson & Partners Home 7 supports scheduled charging aligned to off-peak windows, though it may not communicate directly with the energy provider. Direct provider integration is more flexible — the energy company can shift your charging to the cheapest slots dynamically, rather than relying on fixed schedules that might miss cheaper windows.
The financial impact is substantial. Switching from a standard variable tariff (~28p/kWh) to Octopus Intelligent Go (~7p/kWh) saves approximately £400–£600 per year for a typical Tesla owner driving 8,000–10,000 miles annually. Even moving to Octopus Go (~8.5p/kWh) or British Gas EV Power+ (~7.9p/kWh) delivers savings of £350–£500 per year. A charger with smart tariff integration ensures you capture these savings automatically, every single night, without having to remember to set timers.
Warranty & Build Quality
The Indra Smart PRO comes with a 3 years warranty, while the Simpson & Partners Home 7 offers 10 years (enclosure). The Simpson & Partners Home 7 offers 7 years more coverage, giving you added peace of mind. Both are OZEV-approved and suitable for outdoor installation — a longer warranty provides more peace of mind for a product that lives outside year-round and is exposed to British weather.
For weatherproofing, the Indra Smart PRO is rated IP54 (weatherproof) (splash-proof — protected against splashing water from any direction), while the Simpson & Partners Home 7 is rated IP54 (weatherproof) (splash-proof — protected against splashing water from any direction). A higher IP rating means better protection against rain, hose water, and dust. In practical terms, any rating of IP54 or above is suitable for a UK outdoor installation, but a higher rating provides extra confidence in extreme weather — particularly relevant if your charger is exposed rather than sheltered under a car port.
Build quality is reflected in the materials and construction. The Indra Smart PRO weighs ~5.0 kg with dimensions of 340mm × 240mm × 115mm, while the Simpson & Partners Home 7 weighs ~5.5 kg with dimensions of 350mm × 200mm × 110mm. A heavier charger typically indicates more robust construction, though modern chargers use high-quality polycarbonate housings that are both lightweight and impact-resistant. If your charger is in a location where it might get bumped by car doors or footballs, look for IK10 impact resistance in the specs — this is the highest rating and means it can withstand 20 joules of impact (equivalent to a 5kg weight dropped from 40cm).
For extended protection: the Indra Smart PRO comes with a standard 3 years warranty from Indra. The Simpson & Partners Home 7 comes with a standard 10 years (enclosure) warranty from Simpson & Partners. When comparing warranties, also check what's covered — most warranties cover manufacturing defects and component failure, but may not cover damage from incorrect installation or extreme weather events. Having your charger installed by an OZEV-approved installer typically ensures the warranty remains valid.
Which Should You Buy?
Buy the Indra Smart PRO if you want the best value for money, or v2g pioneer.
Buy the Simpson & Partners Home 7 if overall quality and user satisfaction matter most, or long-term peace of mind is a priority, or you have or plan to install a three-phase electrical supply, or 10-year warranty.
Our Verdicts
The Indra Smart PRO's killer feature is the included SPD, which genuinely saves you money on installation. If your electrician would otherwise charge £150 for a surge protection device, the Indra effectively costs £449 — making it very competitive. The V2G pedigree is interesting but speculative for now. A practical, honest choice for people who want a solid British-made charger without overpaying for features they won't use.
Simpson & Partners is the underdog that deserves more attention. The Home 7 offers premium British-made build quality, a 10-year enclosure warranty, and three-phase support for £649 — less than the Andersen A3 (£995) and with a warranty that's 3 years longer. The trade-off is a less established brand with fewer reviews and a smaller installer network. If you're willing to take a chance on a smaller brand, the value proposition is excellent.
