GoodWe – ET Plus Series 3P Hybrid Inverter – 5 kW to 10 kW

The GoodWe ET Series (ET PLUS+ variant) is a three‐phase, high‐voltage hybrid inverter designed to combine solar PV generation, energy storage (battery) input, smart load control, peak shaving and backup / uninterruptible power features. It supports a power range around 5 kW to 10 kW (for residential/large residential applications) and is part of the global brand’s portfolio for energy independence, self‐consumption optimization and future‐proofing. The datasheet describes it as “among the most adaptive options in the market for flexible residential needs”.TThe model series covers variants such as GW5K‐ET, GW6.5K‐ET, GW8K‐ET and GW10K‐ET with nominal apparent power of 5 kW, 6.5 kW, 8 kW and 10 kW respectively.For example the GW10K‐ET variant has nominal output power of 10 000 VA to the utility grid, battery voltage range 180-600 V, maximum efficiency up to 98.2 %.

Features & Benefits

• High solar energy harvest: With 150% DC input oversizing, high input voltage range and high efficiency (~98.2 %), the inverter can extract more energy from the PV system under variable irradiance conditions. This means more kilowatt-hours of usable energy.
• Hybrid functionality: The unit supports battery input (180-600 V) so that PV + storage + grid interplay is possible. This supports shifting energy use to off-peak hours or backup during grid outages.
• Smart load control / Peak shaving: The unit supports peak shaving (reducing power drawn from the grid when demand peaks) and smart load control (e.g., activating external loads like heat pumps via dry contact). This can reduce imported grid power and lower energy bills.
• 100% unbalanced output: In many three-phase systems loads may not be perfectly balanced across phases; the ET Series allows full output even when one or more phases carry different loads, enhancing flexibility.
• Backup / UPS capability: With fast switch (<10 ms) it can provide uninterrupted power to critical loads (e.g., lighting, refrigeration) when grid fails — important for areas with unstable grid or frequent outages.
• Robust protection & build quality: IP66 rating, Type II SPD, natural (fanless) cooling (quiet), making it suitable for tropical/outdoor installations.
• Scalability & future-proofing: The “battery ready option” means that even if battery storage isn’t installed now, the system can be pre-configured for future storage addition.

Use Cases

• Residential solar + storage + grid-tie: Homeowners who have or plan to install rooftop PV and want to add storage for backup or energy shifting. For example: day time PV generation → use household, surplus charges battery → evening/night battery discharge → minimize grid import.
• Backup for grid-unstable areas: In areas where the main grid is unreliable (load-shedding, voltage dips), the inverter’s UPS backup capability ensures continuity of critical loads (lights, fridge, communications, security).
• Commercial/SME installations with three-phase supply: Shops, offices, small factories, guest houses that use three-phase supply and want to incorporate PV + battery to reduce demand charges, avoid peak rates, or ensure power reliability. The 100% unbalanced output means even if loads are uneven across phases, the system will still perform.
• Peak shaving & demand management: For places where utility tariffs penalize high demand peaks, the system can actively limit imported power and trigger battery or other loads via smart load control to flatten demand profile.
• Hybrid setups for emerging market grid-tie + islanding: In more remote locations where grid may be weak or intermittent, the hybrid inverter can operate in grid-tie mode and switch to backup / islanding when needed.

Value Propositions

• High solar potential: Tanzania has abundant solar insolation. A high-efficiency inverter with oversizing capability can harvest more of that solar resource and improve ROI for residential and commercial customers.
• Grid reliability considerations: In areas where grid outages or fluctuations are common, the inverter’s backup and hybrid capabilities provide resilience, value, and comfort – an important differentiator.
• Three-phase supply prevalent in higher-end homes & commercial: Many medium/large homes, lodges, offices use three-phase supply. A hybrid inverter built for three-phase (rather than single-phase) is therefore well-positioned.
• Cost savings & self-consumption focus: With rising electricity costs and possible incentives or policies encouraging solar, reducing grid import and peak demand is a compelling business case. The inverter’s smart load control and peak-shaving features address exactly that.
• Local environmental suitability: The IP66 rating and rugged build suit Tanzania’s climate (heat, humidity, dust) making it less likely to fail prematurely.
• Future-proof / turnkey system simplicity: For installers and customers, choosing a hybrid inverter that supports battery, grid, smart loads and backup in one simplifies system design, reduces components and may lower installation complexity / cost.
• Brand confidence: GoodWe is a recognized global supplier of inverters and energy storage solutions. That may matter for local installers and customers looking for reliability, warranty support and service in Tanzania/ East Africa.

Local Market Positioning in Tanzania

• Installation & support network: Ensure installation by certified/experienced technicians (three-phase hybrid + battery systems are more complex). Provide local training, service support, warranty management.
• Battery compatibility & ecosystem: Highlight which batteries are compatible (GoodWe typically supports a range). Customers will ask about battery size (kWh), brands, whether existing batteries can be used, etc.
• Import / local supply chain: Build distribution network, inventory, spare parts support in Tanzania (or neighbouring East-Africa region). Consider shipping costs, customs, duties, local inverter licensing/registration requirements.
• Cost vs ROI messaging: Provide clear calculations for Tanzanian tariffs (kWh rate), expected solar generation (kWh/year), self-consumption rates, possible battery savings during peak demand or outage scenarios. Emphasise pay-back time, return on investment.
• Regulatory & grid interconnection: Check local utility’s rules for solar export, net-metering, feed-in tariffs, three-phase grid connections, and ensure the system design aligns with Tanzania Electric Supply Company (TANESCO) or relevant body’s requirements. Provide documentation of certifications (CE, IEC) to build trust.
• Competition: There are other hybrid three-phase inverters in the market (local/regional Chinese brands, European brands). GoodWe’s selling points (high efficiency, 100% unbalanced output, strong brand, hybrid + backup capability) should be highlighted. Provide comparative advantages (e.g., higher efficiency, better flexibility, future battery-ready).
• After-sales support & warranty: Offer clear warranty terms (inverter warranty period, service support, monitoring app), show historical reliability. GoodWe’s global presence and track record can help build trust for Tanzanian buyers.
• Marketing message for Tanzania: Speak in terms of “energy independence”, “lower electricity bills”, “backup power during outages”, “three-phase home commercial ready”, “future-ready battery connection”. Make the value very local: e.g., where loads like air-conditioning, refrigeration, small business equipment run three-phase; talk about how the inverter enables self-consumption and resilience.
• Installation environment conditions: For Tanzania’s climate (high temperature, humidity, dust, sometimes rocky or seaside locations) reassured features such as fanless or efficient cooling, IP66 rating and wide operating temperature range are important selling points.
• Target customer segments: Middle to upper-income homeowners with three-phase supply.Small business owners (restaurants, lodges, offices) looking to cut electricity costs and gain backup.Solar installers seeking hybrid three-phase solutions for larger residential / commercial projects.

Technical Specification