A floating cover sheet of a liquid reservoir is configured to rest on the liquid surface and includes a plurality of elongated sheet panels each defining edges and a lower region. The sheet panels are connected to one another and each of the sheet panels has a buoyant carrier sheet disposed in the lower region thereof. The buoyant carrier sheet is made of plastic and defines a carrier surface. A plurality of panel-shaped solar modules are applied to corresponding ones of the carrier surfaces of the carrier sheets. The solar module has a width less than the width of the corresponding sheet panel so as to define, on each sheet panel, a strip of carrier material free of the solar module corresponding thereto and configured to be walked on and to be slip resistant.

A dome shaped roof structure for outdoor pools, both above ground pools and with minimal modification inground pools, that does not interfere with the use of the pool consisting of a plurality of flexibility poles supported by the pool, with a flexible tension ring holding the pole ends together over the center of the pool and a net fabric material that covers the pole and tension ring frame which is secured around the top of the pool. The roof structure works for all shapes and many sizes of pools providing protection from bugs and debris while still maintaining the outdoor experience. The high flexibility of the frame and tension ring allows winds and rain to flow thru without damage to the roof during inclement weather. The low number of elements that make up the roof structure make it inexpensive as well as easy to assemble, dismantle and store.

A cover for a hot tub or spa is disclosed having a flat cross beam positioned across on a first axis of the tub, the flat cross beam having first and second ends, and being configured to support an interior cover, a curved joist disposed above the flat cross beam, and arranged in substantially the same plane as the cross beam, and pivotably connected to the flat cross beam at respective first and second ends, the curved joists being configured to support an exterior cover, a vertical connector engaged to the flat cross beam on one end and engaged to the curved joist on a second end, wherein upon applied motive force in a direction, the vertical connector is configured to collapse and flatten the exterior cover. A method of using the same is also disclosed.

A pool cover assembly includes a first encapsulation member defining a first side of a pool cover encapsulation, the first encapsulation member comprising a first mating feature. The pool cover assembly further includes a second encapsulation member defining a second side of the pool cover encapsulation, the second encapsulation member comprising a second mating feature. And the pool cover assembly further includes a corner endcap member comprising a third mating feature and a fourth mating feature. The first encapsulation member is coupleable to the corner endcap by the first mating feature and the third mating feature, and the second encapsulation member is coupleable to the corner endcap by the second mating feature and the fourth mating feature. The corner endcap member couples with the first encapsulation member and the second encapsulation member to form a corner of the pool cover encapsulation.

A photovoltaic (“PV”) macro-module for solar power generation includes a plurality of solar cell strings disposed within a laminated support structure. The solar cell strings generate solar power in response to light incident upon a frontside of the solar cell strings. Each of the solar cell strings includes a plurality of solar cells electrically connected in series. The laminated support includes a substrate layer to provide physical environmental protection to a back side of the solar cell strings, a backside encapsulant layer disposed between the substrate layer and the solar cell strings, and a frontside encapsulant layer. The backside encapsulant layer conforms to and molds around the back side of the solar cell strings while the frontside encapsulant layer conforms to and molds around the frontside of the solar cell strings. The laminated support structure is compliant to rolling or folding.

A roller apparatus (102) is provided including roller means (104), drive means (110) for driving rotation of the roller means in use, and an electrical power source for providing electrical power to the drive means in use. The electrical power source is provided by one or more batteries (112) located internally of the roller means.

A roll-up spa cover for protecting and insulating an outdoor swim spa includes a multi-layer flexible insulation sheet structure is sized to at least cover a top of a spa and comprises at least two flexible layers. Support members may be attached to the plurality of support members in a parallel spaced relationship. Flexible rods can be removable located onto or into the support members to form an arcing framework over the support members. A rain fly may be overlaid on the flexible rods. The support members may include an angled aperture for receiving an end of the flexible rods and end caps may be provided over ends of the support members. The flexible rods are held in compression between the angled apertures and/or the end caps.

A roll-up spa cover for protecting and insulating an outdoor swim spa includes a multi-layer flexible insulation sheet structure is sized to at least cover a top of a spa and comprises at least two flexible layers. Support members may be attached to the plurality of support members in a parallel spaced relationship. Flexible rods can be removable located onto or into the support members to form an arcing framework over the support members. A rain fly may be overlaid on the flexible rods. The support members may include an angled aperture for receiving an end of the flexible rods and end caps may be provided over ends of the support members. The flexible rods are held in compression between the angled apertures and/or the end caps.

A rolling-unrolling device for a protective cover for covering a surface to be protected is presented. The device is self-propelling and includes a braking system for blocking the rotation of at least one drive wheel of the carriages and causing the cover to be automatically tensioned during the rolling up thereof on the roller tube. This braking system includes a movable pawl integral with each of the carriages, and a ratchet wheel integral with the drive wheel of each of the carriages, such that, in the direction of rotation corresponding to the unrolling of the cover, the pawl is not engaged with the ratchet wheel and the braking system is in the passive position, and in the opposite direction of rotation corresponding to the rolling up of the cover, the pawl is engaged with the ratchet wheel and the braking system is in the active position.

A pool double safety cover with at least one protection protocol includes a first cover that is substantially impermeable to water, and a second cover that is substantially permeable to water. A track system having independent parallel tracks is provided for guiding the first cover and the second cover to open and close over a pool. At least one interlock switch is configured to generate a signal indicating whether the first cover and the second cover is in a fully open or fully closed state. A drive system is configured to open and close the first cover and the second cover over the pool according to a protection protection protocol based on feedback from the interlock switch and at least one sensor. In another example, the protection protocol is a freeze protection protocol. In another example, the protection protocol is a precipitation protection protocol.