Yes – solar batteries can be installed outside in the UK, but only if they are housed in a suitable weatherproof enclosure and the installation meets safety and warranty requirements. While most manufacturers recommend keeping battery systems indoors for better efficiency and longevity, there are. Sometimes my system voltage stays in the sub 250v range but for no reason I can fathom on other days it hits over 260v. (never seen it higher than 265v) My Victron Quattro inverter is actually set to output 220v, (10v below where it should be for continental Europe), in an attempt to help keep. The open circuit voltage is what should never be exceeded. That said at 130/260v you're going to be putting a strain on electronic circuits in the house. In solar PV applications, these boxes protect DC circuit breakers, DC fuses, surge protection devices, and wiring connections from. Sunwize Power & Battery Battery Enclosures are available in various sizes and configurations for housing batteries and support equipment, engineered specifically for the PV industry but suitable in a wide variety of applications. Most of our enclosures are designed to NEMA3R and rated for outdoor.