SolBox
SolBox by Axinar is the solution for saving electricity and reducing energy costs — convert your electric water heater into a photovoltaic hot water system, 365 days a year, without plumbing or maintenance.
SolBox by Axinar is the solution for saving electricity and reducing energy costs — convert your electric water heater into a photovoltaic hot water system, 365 days a year, without plumbing or maintenance.
THE PRODUCT
SolBox — solar water heating with photovoltaics for maximum energy savings
Using cables to transfer solar energy from photovoltaic panels on the roof, SolBox converts that energy to heat the water in your existing electric water heater. It offers an ecological and efficient alternative for hot water production without the need for plumbing or complex installations — with electricity savings up to 100% on domestic hot water heating.
Also see our burners for central heating systems, the SolBox FAQ, or visit the Academy for detailed guides.
Also see our burners for central heating systems, the SolBox FAQ, or visit the Academy for detailed guides.
ADVANTAGES
Why choose SolBox for energy and water heating savings
365-day operation
Hot water every day, even on cloudy days.
Hot water every day, even on cloudy days.
Any roof type
Tiled roof or flat terrace, any slope.
Tiled roof or flat terrace, any slope.
No plumbing needed
Only cables — ideal for multi-story buildings.
Only cables — ideal for multi-story buildings.
Zero maintenance
Installation by electrician or plumber.
Installation by electrician or plumber.
Safety
Lightning protection, low voltage 70V.
Lightning protection, low voltage 70V.
Smart control
App for remote operation, scheduling, diagnostics.
App for remote operation, scheduling, diagnostics.
Cold weather resistant
Durable in winter, safe in summer.
Durable in winter, safe in summer.
Subsidized
Greek “Exoikonomo” program — Intervention #5.
Greek “Exoikonomo” program — Intervention #5.
TECHNICAL SPECIFICATIONS
SolBox technical specifications — photovoltaic hot water system
SolBox is an innovative electronic device that converts the voltage from photovoltaic panels into the appropriate output to heat water via an electric heating element, delivering maximum electricity savings. It incorporates an advanced MPPT (P&O) algorithm for maximum power extraction. The device connects via Wi-Fi with SSL-encrypted communication for secure app connectivity.
| Specification | Detail |
|---|---|
| Dimensions (W x D x H) | 14.5 x 9.5 x 14.5 cm |
| Heating | 100 – 500 liters · up to 6 PV panels · 70V DC without inverter |
| Algorithm | MPPT (P&O) for maximum power extraction |
| Connectivity | Wi-Fi (SSL) · online app · statistics, fault alerts, technician diagnostics |
| Scheduling | 4 time-based programs (24h) · holiday calendar · boiler/buffer tank connection |
| Safety | Lightning protection · electrical safety · water thermometer |
| Subsidy | EXOIKONOMO |
CERTIFICATIONS & COMPLIANCE
Certifications, subsidy eligibility & invoicing
| Item | Detail |
|---|---|
| CE Certification | |
| PV panels (320Wp) | CE marked |
| SolBox MPPT controller | CE marked |
| Heating element + safety thermostat | CE marked |
| System classification | |
| Type | Standalone PV direct electric water heating — not grid-connected, no inverter |
| Operating voltage | 70V DC — low voltage, no grid connection permit required |
| Category | DHW system using Renewable Energy Sources (not a solar thermal collector) |
GREEK SUBSIDY PROGRAM
Exoikonomo eligibility & KENAK registration
SolBox qualifies for the Greek “Exoikonomo” energy efficiency subsidy under Intervention #5: DHW system using Renewable Energy Sources. Below are the registration steps for energy auditors and engineers working with the Greek building energy performance regulation (KENAK).
| Step | Section | What is registered |
|---|---|---|
| 1 | DHW System (6.3.5) |
Type: Electric resistance heater Efficiency: 0.95 (TOTEE 20701-4, Table 11.1) Storage tank: ≈ 0.90 |
| 2 | Photovoltaics (5.5) |
Type: Standalone (not grid-connected) Capacity: 0.64 kWp (2 × 320Wp) Orientation: per actual installation Substitutes grid consumption → reduces primary energy |
| 3 | What NOT to do (6.3.7) |
Do not register as solar thermal collector — not thermal, no EN 12975, no solar circuit parameters |
| Field | Content |
|---|---|
| Required invoice description | |
| “Domestic Hot Water production system using Renewable Energy Sources (Photovoltaic direct electric water heating system) – SolBox Light” | |
| Itemized components | |
| Photovoltaic panel 320Wp — CE | 2 pcs |
| SolBox device — MPPT controller — CE | 1 pc |
| Electric heating element with safety thermostat | 1 pc |
| Mounting base | 1 pc |
| Documentation from supplier | |
| 1. | SolBox Light technical datasheet |
| 2. | CE declaration |
| 3. | Invoice described as “DHW system using RES” |
Want more information?
Contact us for a personalised quote or any technical question about our products.