{"id":7623,"date":"2026-07-06T11:35:53","date_gmt":"2026-07-06T08:35:53","guid":{"rendered":"https:\/\/axinar.com\/solbox-technical-specifications-en"},"modified":"2026-07-06T11:40:13","modified_gmt":"2026-07-06T08:40:13","slug":"solbox-technical-specifications","status":"publish","type":"page","link":"https:\/\/axinar.com\/en\/solbox-technical-specifications","title":{"rendered":"SolBox \u2014 Technical Specifications"},"content":{"rendered":"

<\/p>\n

\n

Complete technical data sheet<\/strong> for SolBox, the DC MPPT solar water heating controller by AXINAR. Direct DC from PV panels into the water heater resistance \u2014 no inverter, no grid connection, no permits.<\/p>\n

Summary<\/h2>\n

SolBox is a DC MPPT electronic controller that feeds power directly from photovoltaic panels into the resistance of any electric water heater (100L\u2013500L). It runs stand-alone \u2014 no inverter, no grid connection, no installation permits. Manufactured in Thessaloniki, Greece, with a 10-year warranty.<\/p>\n

Electrical<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Electrical<\/th>\n<\/tr>\n
Input voltage (DC)<\/td>\nup to 70 V<\/td>\n<\/tr>\n
Input from<\/td>\nPV panels (direct DC, no inverter)<\/td>\n<\/tr>\n
Panels supported<\/td>\nup to 6 units<\/td>\n<\/tr>\n
Panel wattage<\/td>\n400\u2013620 W per panel<\/td>\n<\/tr>\n
Total array power<\/td>\nup to ~3,500 W<\/td>\n<\/tr>\n
Output<\/td>\nDC into water heater resistance<\/td>\n<\/tr>\n
MPPT algorithm<\/td>\nP&O (Perturb & Observe)<\/td>\n<\/tr>\n
Idle grid draw<\/td>\nNone \u2014 no grid consumption when standing by<\/td>\n<\/tr>\n<\/table>\n

Mechanical<\/h2>\n\n\n\n\n\n\n\n
Mechanical<\/th>\n<\/tr>\n
Dimensions (W \u00d7 D \u00d7 H)<\/td>\n14.5 \u00d7 9.5 \u00d7 14.5 cm<\/td>\n<\/tr>\n
Weight<\/td>\n2.5 kg<\/td>\n<\/tr>\n
Enclosure material<\/td>\nMetal with powder coating<\/td>\n<\/tr>\n
Mounting<\/td>\nWall-mounted, near the water heater<\/td>\n<\/tr>\n
Cooling<\/td>\nPassive (no fan)<\/td>\n<\/tr>\n<\/table>\n

Water Heater Compatibility<\/h2>\n\n\n\n\n\n\n
Boiler<\/th>\n<\/tr>\n
Boiler capacity range<\/td>\n100 L \u2013 500 L<\/td>\n<\/tr>\n
Resistance type<\/td>\nStandard 220V electric resistance (2,000\u20134,500 W)<\/td>\n<\/tr>\n
Equipment replacement<\/td>\nNone \u2014 uses your existing water heater<\/td>\n<\/tr>\n
Extra plumbing<\/td>\nNone \u2014 only electrical connection<\/td>\n<\/tr>\n<\/table>\n

Operational<\/h2>\n\n\n\n\n\n\n\n\n
Operational<\/th>\n<\/tr>\n
Water temperature setpoint<\/td>\nUser-configurable, up to 85\u00b0C<\/td>\n<\/tr>\n
Two independent setpoints<\/td>\nSun + Backup source (e.g. grid)<\/td>\n<\/tr>\n
Scheduling<\/td>\n4 independent 24-hour programs<\/td>\n<\/tr>\n
Anti-freeze protection<\/td>\nAuto-activates < 5\u00b0C, cuts off at 8\u00b0C<\/td>\n<\/tr>\n
Behaviour when no sun<\/td>\nWater heater keeps working on grid power<\/td>\n<\/tr>\n
Cloudy-weather behaviour<\/td>\nProduces hot water even with ~10W from panels<\/td>\n<\/tr>\n<\/table>\n

Connectivity<\/h2>\n\n\n\n\n\n\n
Connectivity<\/th>\n<\/tr>\n
WiFi<\/td>\n2.4 GHz<\/td>\n<\/tr>\n
Mobile app<\/td>\niOS + Android<\/td>\n<\/tr>\n
Remote control<\/td>\nSetpoints + schedule adjustments<\/td>\n<\/tr>\n
Monitoring<\/td>\nEnergy produced, water temperature, statistics<\/td>\n<\/tr>\n<\/table>\n

Installation<\/h2>\n\n\n\n\n\n\n\n
Installation<\/th>\n<\/tr>\n
Installation type<\/td>\nOff-grid \u2014 no connection to the electrical grid<\/td>\n<\/tr>\n
Permits \/ net-metering<\/td>\nNone (not a grid-tied system)<\/td>\n<\/tr>\n
Installer<\/td>\nCertified SolBox installer or licensed electrician<\/td>\n<\/tr>\n
Installation time<\/td>\nTypically 3\u20135 hours<\/td>\n<\/tr>\n
Wiring<\/td>\nDC from panels to SolBox \u2192 output to resistance<\/td>\n<\/tr>\n<\/table>\n

Warranty & Lifespan<\/h2>\n\n\n\n\n\n\n
Warranty<\/th>\n<\/tr>\n
Controller warranty<\/td>\n10 years<\/td>\n<\/tr>\n
Expected service life<\/td>\n12+ years<\/td>\n<\/tr>\n
Panel performance warranty<\/td>\n20\u201325 years (from panel manufacturer)<\/td>\n<\/tr>\n
Service<\/td>\nAXINAR \u2014 Thessaloniki, Greece<\/td>\n<\/tr>\n<\/table>\n

Manufacturing<\/h2>\n\n\n\n\n\n\n\n
Manufacturing<\/th>\n<\/tr>\n
Country of manufacture<\/td>\nGreece<\/td>\n<\/tr>\n
Production site<\/td>\nThessaloniki<\/td>\n<\/tr>\n
Manufacturer<\/td>\nAXINAR A.E.<\/td>\n<\/tr>\n
Founded<\/td>\n2010<\/td>\n<\/tr>\n
Manufacturer certifications<\/td>\nISO 9001:2015, ISO 14001:2015<\/td>\n<\/tr>\n<\/table>\n
\n
Ready for SolBox?<\/div>\n

The SolBox Configurator calculates exactly what you need in 60 seconds \u2014 based on your water heater capacity, household size, and location.<\/p>\n

Open the Configurator<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Complete technical data sheet for SolBox, the DC MPPT solar water heating controller by AXINAR. Direct DC from PV panels […]<\/p>\n","protected":false},"author":16,"featured_media":3564,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_eb_attr":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-7623","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/pages\/7623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/comments?post=7623"}],"version-history":[{"count":0,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/pages\/7623\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/media\/3564"}],"wp:attachment":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/media?parent=7623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}