Balboa Hot Tub Retrofit Kits For Easy Spa Upgrades provide a complete solution to replace aging spa control systems. The BP and VS families feature Balboa's patented M7 temperature and flow sensor technology, a rugged plastic enclosure to resist water intrusion, and a universal control platform for easier installation and service. This makes upgrading faster and more reliable for both professional technicians and informed owners.
Designed for flexibility and longevity, the kits support 120/240V power, 4.0 or 5.5kW heaters, and easy wiring to existing pumps, with components built to simplify service. For spa professionals and informed owners alike, Balboa Hot Tub Retrofit Kits For Easy Spa Upgrades offer proven reliability, streamlined installation, and confidence in ongoing performance.
![Balboa, BP7 4.0kW Control [VS510SZ] Retrofit Kit (54371HC2) [G6405] Spa Parts: Spa Control Systems (Balboa) OPTIMIZE_BACKUP_PRODUCT_G6405-1](http://bathparts.com/cdn/shop/files/OPTIMIZE_BACKUP_PRODUCT_G6405-1.jpg?v=1769976110&width=1000)
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![Balboa BP7 5.5kW Spa Control Hydro Spa [HS200VS] [120/240v] Retrofit Kit (55098) Spa Parts: Spa Control Systems (Balboa) 54218](http://bathparts.com/cdn/shop/files/54218.jpg?v=1769976170&width=800)
![Balboa, BP7 4.0kW Control [VS511SZ] [240V] [4.0kW] (54384) Spa Parts: Spa Control Systems (Balboa) g6405](http://bathparts.com/cdn/shop/products/g6405.jpg?v=1769976128&width=600)
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![Balboa VS500Z Spa Control Box [Replacement System] [4.0kW] (54368-03) Spa Parts: Spa Control Systems (Balboa) G6505](http://bathparts.com/cdn/shop/products/G6505.jpg?v=1769976089&width=1000)
![Balboa BP7 5.5kW Spa Control VS500 [5.5kW] Retrofit Kit (54368HC3) Spa Parts: Spa Control Systems (Balboa) 54216-Z_bf4eb5fe-75ac-4e18-a681-2f5e4d2bdae2](http://bathparts.com/cdn/shop/products/54216-Z_bf4eb5fe-75ac-4e18-a681-2f5e4d2bdae2.jpg?v=1769976089&width=800)
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![Balboa VS500 Keys 100D 5.5kw Spa Control [115/230v] (54358) Spa Parts: Spa Control System Parts (Balboa Retrofit Kits) Balboa-VS-Retro-G6405](http://bathparts.com/cdn/shop/files/Balboa-VS-Retro-G6405.jpg?v=1770913712&width=1526)
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![Balboa Spa Control, [Bullfrog] BP7 Series, 4kw, oval topside panel (52857) (G6406) Spa Controls G6406_5cf46763-8b46-4f38-930b-ced4463efb09](http://bathparts.com/cdn/shop/products/G6406_5cf46763-8b46-4f38-930b-ced4463efb09.jpg?v=1769976169&width=700)
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![Balboa, BP7 4.0kW Control [240v] TP500 Topside (G6405-01) Spa Parts: Spa Control System Parts (Balboa Retrofit Kits) 58-138-3255_6-DIAGRAM__XL_85817b39-60bc-4053-a5b5-88957f18e37e](http://bathparts.com/cdn/shop/products/58-138-3255_6-DIAGRAM__XL_85817b39-60bc-4053-a5b5-88957f18e37e.jpg?v=1769976125&width=1600)
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![Balboa Spa Control, Water Pro BP7 Retro-Fit Spa Control 4.0kW Low-Flow Heater SpaTouch Mini Panel [50-BP7-STM-40-C] Spa Parts: Spa Control Systems (hydro-quip) 50-BP7-STM-40-C](http://bathparts.com/cdn/shop/files/50-BP7-STM-40-C.webp?v=1769976161&width=1200)