800W Balcony Power Plant Set (890Wp) - Hoymiles HMS-800W-2T - JA Solar 445W Bifacial

JA Solar 445W Balcony Power Plant Set with Hoymiles 800W Microinverter – 890 Wp Total Output

Two bifacial high-performance modules, each with 445 Wp, deliver up to 890 Wp DC power – enough to cover the base load in the household and a large part of the daily consumption directly with solar power. The Sovinar Duo 890 Wp complete set combines 2 × JA Solar JAM54D41-445/LB with the Hoymiles HMS-800W-2T Microinverter with WiFi. Simply mount, connect – no electrician required or special tools needed.

Why an 890 Wp Balcony Power Plant with Two Modules?

• Optimal Space Utilization
Nearly 0.9 kWp on about 3.9 m² – ideal for balcony railings, carports, or terrace roofs.

• Ready to Use Immediately
Plug in the Schuko plug, and the feed-in begins. Registration is sufficient – no feed-in contract necessary.

• Short Payback Period
Set price under €400 with up to 1040 kWh annual yield = about 1.5 years payback time (at €0.32/kWh).

• Expandable
Add storage or change the mount – the system remains compatible.

• Significant CO₂ Reduction
Up to 520 kg CO₂ per year – energy payback after about 1.5 years.

The Modules – JA Solar JAM54D41-445/LB (2 pieces)

• 445 Wp module power, 22.3% efficiency per module
• Bifacial: Rear side light increases yield by up to 10%
• Robust glass-glass construction, IP68, load capacity: 5400 Pa (front), 2400 Pa (rear)
• Temperature coefficient –0.30%/°C – ideal in heat
• 15-year product warranty, 25-year linear performance warranty ≤ 0.55%/year

Dimensions per module: 1762 × 1134 × 30 mm, weight: 23.0 kg

Efficient Conversion – Hoymiles HMS 800W Inverter

• 800 W AC nominal power – below the 800-watt exemption limit, therefore approval-free in Germany
• 2 independent MPPT inputs – ideal for 2 separate solar modules with different orientations or shading
• High European efficiency up to 96.7% – maximum energy yield with minimal loss
• Passive, fanless cooling concept – silent operation and longer lifespan
• Protection class IP67 – dust and waterproof, for permanent outdoor use
• Compatible with Hoymiles DTU-WLite (optional) – remote monitoring via app and web portal possible
• Reliable safety features – including NA protection according to VDE-AR-N 4105
• Compact design – ideal for mounting directly on the solar module or on the wall

Mounting with Van-der-Valk quick clamps directly on the module frame – no drilling, no loops needed.

Configuration – Mounts, Cables, Storage Option

Mount Types
• Balcony (round), flat roof (with/without drilling), pitched roof (also full black), wall mounting, trapezoidal sheet (e.g., carport)

Connection Cables
• 3 m: Balcony, 5 m: Terrace, 10 m: Garage or garden shed – UV-resistant, pre-assembled with Schuko, Wieland optional

Storage Upgrade
• e.g., Sunlit BK215 (2.15 kWh, stackable), self-consumption > 95% achievable

Installation in 3 Steps

1. Attach the mount – e.g., clamp, ballast, or set roof hooks

2. Insert modules, connect inverter, connect MC4 contacts

3. AC cable into Schuko socket – the feed-in starts automatically

Duration: approx. 45–75 minutes; a second person simplifies the setup.

Yield, Cost-Effectiveness & CO₂ Savings

• Annual yield (south side, 30°): 900–1040 kWh
• Electricity savings at €0.32/kWh: €290–330 per year
• Self-consumption approx. 85%, with storage > 95%
• Payback: about 2 years without storage
• CO₂ savings: approx. 520 kg/year → > 5 tons in 10 years

Even with east/west orientation, 700–800 kWh remains realistic.

Legal Framework in Germany

• Approval-free up to 800 W AC power
• Registration in the market master data register required (approx. 10 min)
• Registration with the grid operator necessary (PDF or web form)
• VDE-AR-N 4105-compliant NA protection integrated in the inverter
• Operation with Schuko allowed (plug-and-play explicitly permitted)

As long as the documents are complete and 800 W is not exceeded, the grid operator cannot refuse the connection.

FAQ

Is bifacial on the balcony worth it?
Yes – light walls or floors reflect light onto the back of the module, which can bring up to 10% more yield.

What happens during a power outage?
The inverter automatically shuts off (NA protection) to ensure safety.

Is a meter change necessary?
Only if the current meter runs backward – in that case, the grid operator will replace it with a bidirectional meter for free.

How loud is the system?
The inverter is passively cooled and fully enclosed – therefore completely silent.

Do I need a storage unit?
Not necessarily. With low daily consumption, a storage unit increases self-consumption to over 95%.